Yamaha YZ85, YZ85W1 User Manual

OWNER’S MANUAL

MANUEL DU PROPRIÉTAIRE

BEDIENUNGSANLEITUNG

YZ85(W)

YZ85W1

YZ85LW(W)

5PA-28199-85

PRINTED ON RECYCLED PAPER
IMPRIMÉ SUR PAPIER RECYCLÉ
AUF RECYCLINGPAPIER GEDRUCKT

YAMAHA MOTOR CO., LTD.

PRINTED IN JAPAN

2006.04-1.4×1 CR
(E,F,G)

OWNER’S MANUAL

YZ85(W)

YZ85W1

YZ85LW(W)

5PA-28199-85-E0

INTRODUCTION

EAU41541

Congratulations on your purchase of the Yamaha YZ85(W)/YZ85W1/YZ85LW(W). This model is the result of Yamaha’s vast
experience in the production of fine sporting, touring, and pacesetting racing machines. It represents the high degree of
craftsmanship and reliability that have made Yamaha a leader in these fields.
This manual will give you an understanding of the operation, inspection, and basic maintenance of this motorcycle. If you
have any questions concerning the operation or maintenance of your motorcycle, please consult a Yamaha dealer.

AN IMPORTANT SAFETY MESSAGE:

● READ THIS MANUAL COMPLETELY BEFORE OPERATING YOUR MOTORCYCLE. MAKE SURE YOU UNDER-

STAND ALL INSTRUCTIONS.

● PAY CLOSE ATTENTION TO THE WARNING AND CAUTION LABELS ON THE MOTORCYCLE.

● NEVER OPERATE A MOTORCYCLE WITHOUT PROPER TRAINING OR INSTRUCTION.

AN IMPORTANT NOTE TO PARENTS:

This motorcycle is not a toy. Before you let your child ride this motorcycle, you should understand the instructions and warn­ings in this Owner’s Manual. Then be sure your child understands and will follow them. Children differ in skills, physical abil­ities, and judgment. Some children may not be able to operate a motorcycle safely. Parents should supervise their child’s
use of the motorcycle at all times. Parents should permit continued use only if they determine that the child has the ability to
operate the motorcycle safely.

MOTORCYCLES ARE SINGLE TRACK VEHICLES. THEIR SAFE USE AND OPERATION ARE DEPENDENT UPON
THE USE OF PROPER RIDING TECHNIQUES AS WELL AS THE EXPERTISE OF THE OPERATOR. EVERY OPERA­TOR SHOULD KNOW THE FOLLOWING REQUIREMENTS BEFORE RIDING THIS MOTORCYCLE.

HE OR SHE SHOULD:

● OBTAIN THOROUGH INSTRUCTIONS FROM A COMPETENT SOURCE ON ALL ASPECTS OF MOTORCYCLE

OPERATION.

● OBSERVE THE WARNINGS AND MAINTENANCE REQUIREMENTS IN THE OWNER’S MANUAL.

● OBTAIN QUALIFIED TRAINING IN SAFE AND PROPER RIDING TECHNIQUES.

● OBTAIN PROFESSIONAL TECHNICAL SERVICE AS INDICATED BY THE OWNER’S MANUAL AND/OR WHEN

MADE NECESSARY BY MECHANICAL CONDITIONS.

IMPORTANT MANUAL INFORMATION

Particularly important information is distinguished in this manual by the following notations:

The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS
INVOLVED!

EAU41090

WARNING

Failure to follow WARNING instructions could result in severe injury or death
motorcycle operator, a bystander or a person inspecting or repairing the motor-

to the

cycle.

CAUTION:

NOTE:

A CAUTION indicates special precautions that must be taken to avoid damage to
the motorcycle.

A NOTE provides key information to make procedures easier or clearer.

NOTE:

● This manual should be considered a permanent part of this motorcycle and should remain with it even if the motorcycle

is subsequently sold.

● Yamaha continually seeks advancements in product design and quality. Therefore, while this manual contains the most

current product information available at the time of printing, there may be minor discrepancies between your motorcycle
and this manual. If you have any questions concerning this manual, please consult your Yamaha dealer.

EWA10030

WARNING

PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS MOTORCYCLE.

IMPORTANT MANUAL INFORMATION

EWA14350

WARNING

THIS MOTORCYCLE IS DESIGNED AND MANUFACTURED FOR OFF-ROAD USE ONLY. IT IS ILLEGAL TO OPER­ATE THIS MOTORCYCLE ON ANY PUBLIC STREET, ROAD OR HIGHWAY. SUCH USE IS PROHIBITED BY LAW.
THIS MOTORCYCLE COMPLIES WITH ALMOST ALL STATE OFF-HIGHWAY NOISE LEVEL AND SPARK ARRESTER
LAWS AND REGULATIONS. PLEASE CHECK YOUR LOCAL RIDING LAWS AND REGULATIONS BEFORE OPERAT­ING THIS MOTORCYCLE.

*Product and specifications are subject to change without notice.

IMPORTANT MANUAL INFORMATION

YZ85(W)/YZ85W1/YZ85LW(W)

OWNER’S MANUAL

©2006 by Yamaha Motor Co., Ltd.

1st edition, March 2006

All rights reserved.

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Co., Ltd.

is expressly prohibited.

Printed in Japan.

EAU10200

TABLE OF CONTENTS

SAFETY INFORMATION ..................1-1

Location of important labels ...........1-4

DESCRIPTION ..................................2-1

Left view ..........................................2-1

Right view........................................2-2

Controls and instruments ................2-3

INSTRUMENT AND CONTROL

FUNCTIONS.......................................3-1

Handlebar switch ............................3-1

Clutch lever ....................................3-1

Shift pedal ......................................3-1

Brake lever .....................................3-2

Brake pedal ....................................3-2

Fuel tank cap ..................................3-3

Fuel ................................................3-3

Fuel tank breather hose .................3-5

Fuel cock ........................................3-5

Starter (choke) knob .......................3-6

Kickstarter ......................................3-6

Seat ................................................3-6

Adjusting the front fork ...................3-7

Front fork bleeding .........................3-8

Adjusting the shock absorber

assembly .....................................3-9

Removable sidestand ...................3-12

PRE-OPERATION CHECKS..............4-1

Pre-operation check list ..................4-2

OPERATION AND IMPORTANT

RIDING POINTS ................................ 5-1

Starting and warming up a cold

engine ......................................... 5-1

Starting a warm engine .................. 5-1

Shifting ........................................... 5-2

Engine break-in .............................. 5-3

Parking ........................................... 5-4

PERIODIC MAINTENANCE AND

MINOR REPAIR................................. 6-1

Periodic maintenance and

lubrication chart .......................... 6-2

Checking the spark plug ................ 6-8

Transmission oil ............................. 6-9

Coolant ........................................ 6-10

Cleaning the air filter element ...... 6-12

Adjusting the carburetor ............... 6-14

Adjusting the throttle cable

free play .................................... 6-14

Tires ............................................. 6-15

Spoke wheels .............................. 6-17

Accessories and replacement

parts ......................................... 6-17

Adjusting the clutch lever

free play .................................... 6-17

Checking the front and rear brake

pads .......................................... 6-18

Checking the brake fluid level ...... 6-19

Changing the brake fluid .............. 6-20

Drive chain slack .......................... 6-20

Cleaning and lubricating the

drive chain ................................6-21

Checking and lubricating the

cables .......................................6-22

Checking and lubricating the

throttle grip and cable ............... 6-22

Checking and lubricating the

brake and shift pedals ............... 6-23

Checking and lubricating the

brake and clutch levers .............6-23

Lubricating the swingarm pivots ... 6-24
Lubricating the rear suspension ... 6-24

Checking the front fork .................6-24

Checking the steering ..................6-25

Checking the wheel bearings .......6-26

Supporting the motorcycle ...........6-26

Front wheel .................................. 6-27

Rear wheel ...................................6-27

Troubleshooting ...........................6-29

Troubleshooting charts ................. 6-30

MOTORCYCLE CARE AND

STORAGE ..........................................7-1

Care ...............................................7-1

Storage ...........................................7-3

SPECIFICATIONS ............................ 8-1

CONSUMER INFORMATION ............9-1

Identification numbers ....................9-1

SAFETY INFORMATION

Safe riding

● Always make pre-operation

1

checks. Careful checks may help
prevent an accident.

● This motorcycle is designed for off-

road use only, therefore, it is illegal
to operate it on public streets,
roads, or highways, even a dirt or
gravel one. Off-road use on public
lands may be illegal. Please check
local regulations before riding.

● This motorcycle is designed to car-

ry the operator only. No passen­gers.

● Many accidents involve inexperi-

enced operators.

• Make sure that the operator is
qualified and that you only lend
your motorcycle to other quali­fied operators.

• Know your skills and limits.
Staying within your limits may
help you to avoid an accident.

● Many accidents have been caused

by error of the motorcycle opera­tor. A typical error made by the op­erator is veering wide on a turn
due to EXCESSIVE SPEED or un-

EAU41460

dercornering (insufficient lean an­gle for the speed). Never travel
faster than warranted by condi­tions.

● Ride cautiously in unfamiliar ar-

eas. You may encounter hidden
obstacles that could cause an ac­cident.

● The posture of the operator is im-

portant for proper control. The op­erator should keep both hands on
the handlebar and both feet on the
operator footrests during operation
to maintain control of the motor­cycle.

● Never ride under the influence of

alcohol or other drugs.

● Be sure the transmission is in neu-

tral before starting the engine.

Protective apparel

The majority of fatalities from motor­cycle accidents are the result of head
injuries. The use of a safety helmet is
the single most critical factor in the pre­vention or reduction of head injuries.

● Always wear an approved helmet.

● Wear a face shield or goggles.

Wind in your unprotected eyes
could contribute to an impairment
of vision that could delay seeing a
hazard.

● The use of a jacket, heavy boots,

trousers, gloves, etc., is effective in
preventing or reducing abrasions
or lacerations.

● Never wear loose-fitting clothes,

otherwise they could catch on the
control levers, footrests, or wheels
and cause injury or an accident.

● Never touch the engine or exhaust

system during or after operation.
They become very hot and can
cause burns. Always wear protec­tive clothing that covers your legs,
ankles, and feet.

Modifications

Modifications made to this motorcycle
not approved by Yamaha, or the re­moval of original equipment, may ren­der the motorcycle unsafe for use and
may cause severe personal injury.
Modifications may also make your
motorcycle illegal to use.

1-1

SAFETY INFORMATION

Loading and accessories

Adding accessories to your motorcycle
can adversely affect stability and han­dling if the weight distribution of the
motorcycle is changed. To avoid the
possibility of an accident, use extreme
caution when adding accessories to
your motorcycle. Use extra care when
riding a motorcycle that has added ac­cessories. Here are some general
guidelines to follow if adding accesso­ries to your motorcycle:
Loading

● Accessory weight should be kept

as low and close to the motorcycle
as possible. Make sure to distrib­ute the weight as evenly as possi­ble on both sides of the motorcycle
to minimize imbalance or instabili­ty.

● Shifting weights can create a sud-

den imbalance. Make sure that ac­cessories are securely attached to
the motorcycle before riding.
Check accessory mounts fre­quently.

● Never attach any large or heavy

items to the handlebar, front fork,
or front fender.

Accessories
Genuine Yamaha accessories have
been specifically designed for use on
this motorcycle. Since Yamaha cannot
test all other accessories that may be
available, you must personally be re­sponsible for the proper selection, in­stallation and use of non-Yamaha
accessories. Use extreme caution
when selecting and installing any ac­cessories.
Keep these guidelines in mind for
mounting accessories in addition to
those provided under “Loading”.

● Never install accessories or that

would impair the performance of
your motorcycle. Carefully inspect
the accessory before using it to
make sure that it does not in any
way reduce ground clearance or
cornering clearance, limit suspen­sion travel, steering travel or con­trol operation.

• Accessories fitted to the handle­bar or the front fork area can
create instability due to improper
weight distribution or aerody­namic changes. If accessories
are added to the handlebar or

1-2

front fork area, they must be as
lightweight as possible and
should be kept to a minimum.

• Bulky or large accessories may
seriously affect the stability of
the motorcycle due to aerody­namic effects. Wind may at­tempt to lift the motorcycle, or
the motorcycle may become un­stable in cross winds.

• Certain accessories can dis­place the operator from his or
her normal riding position. This
improper position limits the free­dom of movement of the opera­tor and may limit control ability,
therefore, such accessories are
not recommended.

● Use caution when adding electri-

cal accessories. If electrical acces­sories exceed the capacity of the
motorcycle’s electrical system an
electric failure could result, which
could cause a dangerous loss of
engine power.

1

SAFETY INFORMATION

Gasoline and exhaust gas

● GASOLINE IS HIGHLY FLAMMA-

BLE:

1

• Be sure to always use a fresh
mixture of oil and gasoline.

• Always turn the engine off when
refueling.

• Take care not to spill any gaso­line on the engine or exhaust
pipe/muffler when refueling.

• Never refuel while smoking or in
the vicinity of an open flame.

● Never start the engine or let it run

for any length of time in a closed
area. The exhaust fumes are poi­sonous and may cause loss of
consciousness and death within a
short time. Always operate your
motorcycle in an area that has ad­equate ventilation.

● Always turn the engine off before

leaving the motorcycle unattend­ed. When parking the motorcycle,
note the following:

• The engine and exhaust
pipe/muffler may be hot, there­fore, park the motorcycle in a

place where pedestrians or chil­dren are not likely to touch these
hot areas.

• Do not park the motorcycle on a
slope or soft ground, otherwise it
may fall over.

• Do not park the motorcycle near
a flammable source (e.g., a ker­osene heater, or near an open
flame), otherwise it could catch
fire.

● When transporting the motorcycle

in another vehicle, make sure that
it is kept upright and that the fuel
cock is turned to “OFF”. If the
motorcycle should lean over, gas­oline may leak out of the carbure­tor or fuel tank.

● If you should swallow any gaso-

line, inhale a lot of gasoline vapor,
or allow gasoline to get into your
eyes, see your doctor immediately.
If any gasoline spills on your skin
or clothing, immediately wash the
affected area with soap and water
and change your clothes.

1-3

Location of important labels

Please read the following important labels carefully before operating this vehicle.

YZ85(W)/YZ85W1

SAFETY INFORMATION

EAU41851

1

1-4

SAFETY INFORMATION

For Canada

1

1

CAUTION

Use premium unleaded gasoline/oil premix only.

3XJ-2415E-A0

2

ATTENTION

Utiliser de préférence un mélange huile/super sans plomb.

3XJ-2415E-B0

4

WARNING

Rinding as a passenger can cause the vehicle
to go out of control.

Loss of control can cause a collision
or rollover, which can result in severe injury
or death.

NEVER ride as a passenger.

3XJ-2151H-A1

5

3

Un passager pourrait causer une perte de
contrôle du véhicule.

Une perte de contrôle peut provoquer une
collision ou un renversement, résultant en
des blessures sérieuses, voire mortelles.

AUCUN passager permis.

4AA-22259-60

AVERTISSEMENT

3XJ-2151H-B1

1-5

SAFETY INFORMATION

6

WARNING

BEFORE YOU OPERATE THIS VEHICLE, READ
THE OWNER’S MANUAL AND ALL LABELS.

NEVER CARRY A PASSENGER. You increase
your risk of losing control if you carry a passenger.

NEVER OPERATE THIS VEHICLE ON PUBLIC
ROADS. You can collide with another vehicle if
you operate this vehicle on a public road.

ALWAYS WEAR AN APPROVED MOTORCYCLE
HELMET, eye protection, and protective clothing.
EXPERIENCED RIDER ONLY.

7

AVERTISSEMENT

LIRE LE MANUEL DU PROPRIETAIRE ANSI QUE TOUTES LES
ETIQUETTES AVANT D’UTILISER CE VEHICULE.

NE JAMAIS TRANSPORTER DE PASSAGER. La conduite avec
passager augmente les risques de perte de contrôle.

NE JAMAIS ROULER SUR DES CHEMINS PUBLICS.
Vous pourriez entrer en collision avec un aulre véhicule

TOUJOURS PORTER UN CASQUE DE MOTOCYCLISTE
APPROUVE, des lunettes et des vêlements de protection.

EXCLUSIVEMENT POUR L’USAGE D’UN CONDUCTEUR
EXPERIMENTE.

5PA-2118K-00

5PA-2118K-10

10

Cold tire normal pressure should be set as

TIRE INFOMATION

follows.
FRONT : 100kPa, {1.00kgf/cm2}, 15psi
REAR : 100kPa, {1.00kgf/cm

11

.

INFORMATION SUR LES PNEUS

La pression des pneus à froid doit normalement
être réglée comme suit.

AVANT : 100kPa, {1.00kgf/cm
ARRIERE

: 100kPa, {1.00kgf/cm2}, 15psi

2

}, 15psi

2

}, 15psi

3RV-21668-A0

3RV-21668-B0

1

1-6

SAFETY INFORMATION

For Europe

10

9

TIRE INFORMATION

Cold tire normal pressure should be set as
follows.
FRONT : 100kPa, {1.00kgf/cm

REAR : 100kPa, {1.00kgf/cm

2

}

, 15psi

2

}, 15psi

3RV-21668-A0

1

3

8

Before you operate this vehicle, read the owner’s manual.
Prima di usare il veicolo, leggete il manuale di istruzioni.
Lire le manuel du propriétaire avant d’utiliser ce véhicule.
Lesen Sie die Bedienungsanleitung bevor Sie dieses Fahrzeug fahren.
Antes de conducir este vehículo, lea el Manual del Propietario.

5PA-21568-00

12

YAMAHA MOTOR CO., LTD.

SHIZUOKA JAPAN

YAMAHA

4GB-2155A-00

1-7

For Oceania and South Africa

SAFETY INFORMATION

8

Before you operate this vehicle, read the owner’s manual.
Prima di usare il veicolo, leggete il manuale di istruzioni.
Lire le manuel du propriétaire avant d’utiliser ce véhicule.
Lesen Sie die Bedienungsanleitung bevor Sie dieses Fahrzeug fahren.
Antes de conducir este vehículo, lea el Manual del Propietario.

5PA-21568-00

103

TIRE INFORMATION

Cold tire normal pressure should be set as

follows.
FRONT : 100kPa, {1.00kgf/cm
REAR : 100kPa, {1.00kgf/cm

2

}

, 15psi

2

}, 15psi

3RV-21668-A0

1

1-8

YZ85LW(W)

1

SAFETY INFORMATION

1-9

For Europe

SAFETY INFORMATION

1

2

Before you operate this vehicle, read the owner’s manual.
Prima di usare il veicolo, leggete il manuale di istruzioni.
Lire le manuel du propriétaire avant d’utiliser ce véhicule.
Lesen Sie die Bedienungsanleitung bevor Sie dieses Fahrzeug fahren.
Antes de conducir este vehículo, lea el Manual del Propietario.

5PA-21568-00

3

4

Cold tire normal pressure should be set as
follows.
FRONT : 100kPa, {1.00kgf/cm

REAR : 100kPa, {1.00kgf/cm

TIRE INFORMATION

5

YAMAHA MOTOR CO., LTD.

SHIZUOKA JAPAN

YAMAHA

4GB-2155A-00

2

}

, 15psi

2

}, 15psi

1

3RV-21668-A0

1-10

SAFETY INFORMATION

For Oceania

1

41

TIRE INFORMATION

Cold tire normal pressure should be set as
follows.
FRONT : 100kPa, {1.00kgf/cm

REAR : 100kPa, {1.00kgf/cm

2

}

, 15psi

2

}, 15psi

3RV-21668-A0

2

Before you operate this vehicle, read the owner’s manual.
Prima di usare il veicolo, leggete il manuale di istruzioni.
Lire le manuel du propriétaire avant d’utiliser ce véhicule.
Lesen Sie die Bedienungsanleitung bevor Sie dieses Fahrzeug fahren.
Antes de conducir este vehículo, lea el Manual del Propietario.

5PA-21568-00

1-11

Left view

1. Radiator cap (page 6-10)

2. Fuel cock (page 3-5)

3. Shock absorber assembly spring preload adjusting nut (page 3-9)

4. Air filter element (page 6-12)

5. Seat (page 3-6)

6. Shift pedal (page 3-1)

7. Starter (choke) knob (page 3-6)

DESCRIPTION

EAU10410

2

2-1

DESCRIPTION

Right view

2

EAU10420

1. Shock absorber assembly compression damping force adjusting screw
(page 3-9)

2. Kickstarter (page 3-6)

3. Front fork rebound damping force adjusting screw (page 3-7)

4. Bleed screw (page 3-8)

5. Front fork compression damping force adjusting screw (page 3-7)

6. Spark plug cap (page 6-8)

7. Oil filler cap (page 6-9)

8. Coolant drain bolt (page 6-11)

9. Transmission oil drain bolt (page 6-9)

10.Brake pedal (page 3-2)

11.Shock absorber assembly rebound damping force adjusting screw
(page 3-9)

2-2

Controls and instruments

1. Clutch lever (page 3-1)

2. Left handlebar switch (page 3-1)

3. Brake lever (page 3-2)

4. Throttle grip (page 6-14)

5. Fuel tank cap (page 3-3)

DESCRIPTION

EAU10430

2

2-3

INSTRUMENT AND CONTROL FUNCTIONS

Handlebar switch

EAU40660

Clutch lever

EAU12850

3

1. Engine stop button “ENGINE STOP” 1. Clutch lever 1. Shift pedal

“ENGINE STOP” button

EAU12670

Hold this button pushed until the engine
stops in case of an emergency, such as
when the vehicle overturns or when the
throttle cable is stuck.

The clutch lever is located at the left
handlebar grip. To disengage the
clutch, pull the lever toward the handle­bar grip. To engage the clutch, release
the lever. The lever should be pulled
rapidly and released slowly for smooth
clutch operation.

EAU12870

Shift pedal

The shift pedal is located on the left
side of the engine and is used in com­bination with the clutch lever when
shifting the gears of the 6-speed con­stant-mesh transmission equipped on
this motorcycle.

3-1

INSTRUMENT AND CONTROL FUNCTIONS

EAU41261

Brake lever

The brake lever is located at the right
handlebar grip. To apply the front
brake, pull the lever toward the handle­bar grip.

1. Brake lever

2. Locknut

3. Adjusting bolt

4. Distance between brake lever and handlebar
grip

The brake lever is equipped with a po­sition adjusting bolt. Adjust the distance
between the brake lever and the han­dlebar grip as follows.

1. Loosen the locknut.

2. While holding the lever pushed
away from the handlebar grip, turn
the adjusting bolt in direction (a) to
increase the distance, and in direc­tion (b) to decrease it.

Distance between the brake lever
and the handlebar grip:

Minimum (shortest):

76 mm (2.99 in)

Standard:

95 mm (3.74 in)

Maximum (longest):

97 mm (3.82 in)

3. Tighten the locknut.

EAU12941

Brake pedal

3

1. Brake pedal

The brake pedal is on the right side of
the motorcycle. To apply the rear
brake, press down on the brake pedal.

3-2

INSTRUMENT AND CONTROL FUNCTIONS

Fuel tank cap

3

1. Fuel tank cap

To remove the fuel tank cap, turn it
counterclockwise, and then pull it off.
To install the fuel tank cap, insert it into
the tank opening, and then turn it clock­wise.

WARNING

Make sure that the fuel tank cap is
properly closed before riding.

EAU13180

EWA11090

EAU41831

Fuel

This motorcycle has been designed to
use a premixed fuel of gasoline and 2­stroke engine oil. Always mix the gaso­line and oil in a clean container before
filling the fuel tank.

ECA15601

CAUTION:

Always use fresh gasoline, and fill
the fuel tank with a fresh mix just be­fore riding. Do not use premixed fuel
that is more than a few hours old.

Mixing gasoline and 2-stroke engine
oil

Pour 2-stroke engine oil into a clean
container, and then add gasoline. To
mix the fuel thoroughly, shake the con­tainer from side to side.

1. 2-stroke engine oil

2. Gasoline

3. Container

Recommended fuel:

Premium unleaded gasoline only

Recommended 2-stroke engine oil:

See page 8-1.

Fuel tank capacity:

5.0 L (1.32 US gal) (1.10 Imp.gal)

Mixing ratios (gasoline to oil):

Break-in period: 15:1
After break-in: 30:1

ECA15590

CAUTION:

Use only unleaded gasoline. The use
of leaded gasoline will cause severe
damage to internal engine parts,
such as the piston rings as well as to
the exhaust system.

3-3

INSTRUMENT AND CONTROL FUNCTIONS

Your Yamaha engine has been de­signed to use premium unleaded gaso­line with a pump octane number
[(R+M)/2] of 91 or higher, or a research
octane number of 95 or higher. If
knocking (or pinging) occurs, use a
gasoline of a different brand.
If the recommended 2-stroke engine oil
is not available, use an equivalent oil.

ECA15551

CAUTION:

Never mix two brands of 2-stroke en­gine oil in the same batch. Always
use the same type of oil to ensure
maximum engine performance.
Should it be necessary to use a dif­ferent oil brand, be sure to drain the
fuel tank and the carburetor float
chamber of the old premixed fuel
prior to filling with the new type.

Filling the fuel tank

1. Fuel level

2. Fuel tank filler tube

Make sure that there is sufficient fuel in
the tank. Fill the fuel tank to the bottom
of the filler tube as shown.

EWA10880

WARNING

● Do not overfill the fuel tank, oth-

erwise it may overflow when the
fuel warms up and expands.

● Avoid spilling fuel on the hot en-

gine.

ECA10070

CAUTION:

Immediately wipe off spilled fuel
with a clean, dry, soft cloth, since
fuel may deteriorate painted surfac­es or plastic parts.

3

3-4

INSTRUMENT AND CONTROL FUNCTIONS

Fuel tank breather hose

3

1. Fuel tank breather hose

2. One-way valve

Before operating the motorcycle:

● Check the fuel tank breather hose

connection.

● Check the fuel tank breather hose

for cracks or damage, and replace
it if damaged.

● Make sure that the end of the fuel

tank breather hose is not blocked,
and clean it if necessary.

NOTE:

If the fuel tank breather hose falls out,
reinstall it on the fuel tank cap with the
arrow mark on the one-way valve point­ed downward as shown.

EAU41360

EAU41280

Fuel cock

The fuel cock supplies fuel from the
tank to the carburetor while filtering it al­so.
The fuel cock has two positions:

OFF

1. Arrow mark positioned over “OFF”

With the lever in this position, fuel will
not flow. Always return the lever to this
position when the engine is not running.

ON

1. Arrow mark positioned over “ON”

With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.

3-5

INSTRUMENT AND CONTROL FUNCTIONS

EAU13640

Starter (choke) knob

1. Starter (choke) knob 1. Kickstarter lever

Starting a cold engine requires a richer
air-fuel mixture, which is supplied by
the starter (choke).
Move the knob in direction (a) to turn on
the starter (choke).
Move the knob in direction (b) to turn off
the starter (choke).

Kickstarter

To start the engine, fold out the kick­starter lever, move it down lightly with
your foot until the gears engage, and
then push it down smoothly but force­fully. This model is equipped with a pri­mary kickstarter, allowing the engine to
be started in any gear if the clutch is
disengaged. However, shifting the
transmission into the neutral position
before starting is recommended.

EAU13650

EAU13960

Seat

To remove the seat

Remove the bolts, and then pull the
seat off.

3

1. Bolt

To install the seat

1. Insert the projections on the front
of the seat into the seat holders as
shown.

3-6

INSTRUMENT AND CONTROL FUNCTIONS

3

1. Projection

2. Seat holder

2. Place the seat in the original posi­tion, and then tighten the bolts.

NOTE:

Make sure that the seat is properly se­cured before riding.

EAU41470

Adjusting the front fork

This front fork is equipped with rebound
damping force adjusting screws and
compression damping force adjusting
screws.

EWA10180

WARNING

Always adjust both fork legs equal­ly, otherwise poor handling and loss
of stability may result.

Rebound damping force

1. Rebound damping force adjusting screw

To increase the rebound damping force
and thereby harden the rebound damp­ing, turn the adjusting screw on each
fork leg in direction (a). To decrease the
rebound damping force and thereby

3-7

soften the rebound damping, turn the
adjusting screw on each fork leg in di­rection (b).

Rebound damping setting:

Minimum (soft):

20 click(s) in direction (b)*

Standard:

7 click(s) in direction (b)*

Maximum (hard):

1 click(s) in direction (b)*

* With the adjusting screw fully turned

in direction (a)

Compression damping force

1. Rubber cap

2. Compression damping force adjusting screw

1. Remove the rubber cap by pulling
it out of the front fork leg.

INSTRUMENT AND CONTROL FUNCTIONS

2. To increase the compression
damping force and thereby harden
the compression damping, turn the
adjusting screw on each fork leg in
direction (a). To decrease the
compression damping force and
thereby soften the compression
damping, turn the adjusting screw
on each fork leg in direction (b).

Compression damping setting:

Minimum (soft):

20 click(s) in direction (b)*

Standard:

YZ85(W)/YZ85W1: 10 click(s) in
direction (b)*
YZ85LW(W): 9 click(s) in direction
(b)*

Maximum (hard):

1 click(s) in direction (b)*

* With the adjusting screw fully turned

in direction (a)

3. Install the rubber cap.

ECA10100

CAUTION:

Never attempt to turn an adjusting
mechanism beyond the maximum or
minimum settings.

NOTE:

Although the total number of clicks of a
damping force adjusting mechanism
may not exactly match the above spec­ifications due to small differences in
production, the actual number of clicks
always represents the entire adjusting
range. To obtain a precise adjustment,
it would be advisable to check the num­ber of clicks of each damping force ad­justing mechanism and to modify the
specifications as necessary.

EAU14790

Front fork bleeding

3

1. Bleed screw

When riding in extremely rough condi­tions, the air temperature and pressure
in the front fork will rise. This will in­crease the spring preload and harden
the front suspension. If this occurs,
bleed the front fork as follows.

1. Elevate the front wheel by placing
a suitable stand under the engine.

NOTE:

When bleeding the front fork, there
should be no weight on the front end of
the vehicle.

2. Remove the bleed screws and al­low all of the air to escape from
each fork leg.

3-8

INSTRUMENT AND CONTROL FUNCTIONS

WARNING

Always bleed both fork legs, other­wise poor handling and loss of sta­bility may result.

3. Install the bleed screws.

3

EWA10200

EAU41330

Adjusting the shock absorber
assembly

This shock absorber assembly is
equipped with a spring preload adjust­ing nut, a rebound damping force ad­justing screw and a compression
damping force adjusting screw.

ECA10100

CAUTION:

Never attempt to turn an adjusting
mechanism beyond the maximum or
minimum settings.

Spring preload

Adjust the spring preload as follows.

1. Loosen the locknut.

2. To increase the spring preload and
thereby harden the suspension,
turn the adjusting nut in direction
(a). To decrease the spring pre­load and thereby soften the sus­pension, turn the adjusting nut in
direction (b).

NOTE:

● A special wrench can be obtained

at a Yamaha dealer to make this
adjustment.

● The spring preload setting is deter-

mined by measuring distance A,
shown in the illustration. The long­er distance A is, the lower the
spring preload; the shorter dis­tance A is, the higher the spring
preload. With each complete turn
of the adjusting nut, distance A is
changed by 1.5 mm (0.06 in).

1. Locknut

2. Spring preload adjusting nut

3-9

INSTRUMENT AND CONTROL FUNCTIONS

1. Distance A

Spring preload:

Minimum (soft):

Distance A = 218.5 mm (8.60 in)

Standard: YZ85(W)/YZ85W1

Distance A = 215.0 mm (8.46 in)
For Europe only: Distance A =

212.0 mm (8.35 in)

Standard: YZ85LW(W)

Distance A = 207.0 mm (8.15 in)
For Europe only: Distance A =

212.0 mm (8.35 in)

Maximum (hard):

Distance A = 202.5 mm (7.97 in)

3. Tighten the locknut to the specified
torque.

ECA10120

CAUTION:

Always tighten the locknut against
the adjusting nut, and then tighten
the locknut to the specified torque.

Rebound damping force

To increase the rebound damping force
and thereby harden the rebound damp­ing, turn the adjusting screw in direction
(a). To decrease the rebound damping
force and thereby soften the rebound
damping, turn the adjusting screw in di­rection (b).

1. Rebound damping force adjusting screw

Rebound damping setting:

Minimum (soft):

20 click(s) in direction (b)*

Standard: YZ85(W)/YZ85W1

6 click(s) in direction (b)*
For Europe only: 12 click(s) in di­rection (b)*

Standard: YZ85LW(W)

7 click(s) in direction (b)*
For Europe only: 12 click(s) in di­rection (b)*

Maximum (hard):

1 click(s) in direction (b)*

* With the adjusting screw fully turned

in direction (a)

Compression damping force

To increase the compression damping
force and thereby harden the compres­sion damping, turn the adjusting screw
in direction (a). To decrease the com­pression damping force and thereby
soften the compression damping, turn
the adjusting screw in direction (b).

3

Tightening torque:

Locknut:

35 Nm (3.5 m·kgf, 25 ft·lbf)

3-10

INSTRUMENT AND CONTROL FUNCTIONS

3

1. Compression damping force adjusting screw

Compression damping setting:

Minimum (soft):

20 click(s) in direction (b)*

Standard: YZ85(W)/YZ85W1

9 click(s) in direction (b)*
For Europe only: 12 click(s) in di­rection (b)*

Standard: YZ85LW(W)

7 click(s) in direction (b)*
For Europe only: 12 click(s) in di­rection (b)*

Maximum (hard):

1 click(s) in direction (b)*

* With the adjusting screw fully turned

in direction (a)

NOTE:

Although the total number of clicks of a
damping force adjusting mechanism
may not exactly match the above spec-

ifications due to small differences in
production, the actual number of clicks
always represents the entire adjusting
range. To obtain a precise adjustment,
it would be advisable to check the num­ber of clicks of each damping force ad­justing mechanism and to modify the
specifications as necessary.

EWA10220

WARNING

This shock absorber contains highly
pressurized nitrogen gas. For prop­er handling, read and understand
the following information before
handling the shock absorber. The
manufacturer cannot be held re­sponsible for property damage or
personal injury that may result from
improper handling.

● Do not tamper with or attempt to

open the gas cylinder.

● Do not subject the shock ab-

sorber to an open flame or other
high heat sources, otherwise it
may explode due to excessive
gas pressure.

3-11

● Do not deform or damage the

gas cylinder in any way, as this
will result in poor damping per­formance.

● Always have a Yamaha dealer

service the shock absorber.

EAU41381

Removable sidestand

1. Sidestand

This motorcycle is equipped with a re­movable sidestand.

NOTE:

Make sure that the sidestand is proper­ly secured when the motorcycle is be­ing supported or is being transported.

EWA14601

WARNING

● Never apply force on the motor-

cycle while it is on the side­stand.

● Always remove the sidestand

before starting out.

INSTRUMENT AND CONTROL FUNCTIONS

3

3-12

PRE-OPERATION CHECKS

The condition of a vehicle is the owner’s responsibility. Vital components can start to deteriorate quickly and unexpectedly,
even if the vehicle remains unused (for example, as a result of exposure to the elements). Any damage, fluid leakage or loss
of tire air pressure could have serious consequences. Therefore, it is very important, in addition to a thorough visual inspec­tion, to check the following points before each ride.

NOTE:

Pre-operation checks should be made each time the vehicle is used. Such an inspection can be accomplished in a very short
time; and the added safety it assures is more than worth the time involved.

4

WARNING

If any item in the Pre-operation check list is not working properly, have it inspected and repaired before operating
the vehicle.

EAU15591

EWA11150

4-1

Pre-operation check list

ITEM CHECKS PAGE

Fuel

Transmission oil

Coolant

Front brake

Rear brake

Clutch

Throttle grip

• Check fuel level in fuel tank.

• Always use a fresh mixture of gasoline and oil.

• Check fuel line for leakage.

• Check oil level in transmission case.

• If necessary, add recommended oil to specified level.

• Check coolant level.

• If necessary, add recommended coolant to specified level.

• Check cooling system for leakage.

• Check operation.

• If soft or spongy, have Yamaha dealer bleed hydraulic system.

• Check brake pads for wear.

• Replace if necessary.

• Check fluid level in reservoir.

• If necessary, add recommended brake fluid to specified level.

• Check hydraulic system for leakage.

• Check operation.

• If soft or spongy, have Yamaha dealer bleed hydraulic system.

• Check brake pads for wear.

• Replace if necessary.

• Check fluid level in reservoir.

• If necessary, add recommended brake fluid to specified level.

• Check hydraulic system for leakage.

• Check operation.

• Lubricate cable if necessary.

• Check lever free play.

• Adjust if necessary.

• Make sure that operation is smooth.

• Check cable free play.

• If necessary, have Yamaha dealer adjust cable free play and lubricate cable and

PRE-OPERATION CHECKS

EAU15605

3-3

6-9

6-10

4

6-18, 6-19

6-18, 6-19

6-17

6-14, 6-22

grip housing.

4-2

PRE-OPERATION CHECKS

ITEM CHECKS PAGE

• Check chain slack.

Drive chain

Wheels and tires

Shift pedal

4

Brake pedal

Steering • Check that the handlebar can be turned smoothly and has no excessive play. 6-25

Front fork and rear shock ab­sorber assembly

Chassis fasteners

Moving parts and cables

Exhaust system

Ignition system • Check that all leads and cables are properly connected. 6-8

• Adjust if necessary.

• Check chain condition.

• Lubricate if necessary.

• Check for damage.

• Check tire condition and tread depth.

• Check air pressure.

• Correct if necessary.

• Check for loose spokes and tighten if necessary.

• Make sure that operation is smooth.

• Correct if necessary.

• Make sure that operation is smooth.

• Lubricate pedal pivoting point if necessary.

• Check that they operate smoothly and there is no oil leakage. 3-7, 3-8, 3-9, 6-24

• Make sure that all nuts, bolts and screws are properly tightened.

• Tighten if necessary.

• Check that the control cables move smoothly.

• Check that the control cables are not caught when the handlebars are turned or

when the front forks travel up and down.

• Lubricate moving parts and cables if necessary.

• Check that the exhaust pipe is tightly mounted and has no cracks.

• Check for leakage.

6-20, 6-21

6-15, 6-17

6-23

6-23

—

6-22, 6-23, 6-24, 6-24

—

4-3

OPERATION AND IMPORTANT RIDING POINTS

EAU41400

EWA14610

WARNING

● This model is designed for off-

road use only. Become thor­oughly familiar with all operat­ing controls and their functions
before riding. Consult a Yamaha
dealer regarding any control or
function that you do not thor­oughly understand.

● Never start the engine or oper-

ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con­sciousness and death within a
short time. Always make sure
that there is adequate ventila­tion.

● Before starting out, make sure

that the sidestand is removed. If
the sidestand is not removed, it
will contact the ground, which
could distract the operator or af­fect the balance of the motor­cycle, resulting in a possible
loss of control.

EAU41300

Starting and warming up a
cold engine

1. Turn the fuel cock lever to “ON”.

2. Shift the transmission into the neu­tral position.

3. Turn the starter (choke) on and
completely close the throttle. (See
page 3-6.)

4. Start the engine by pushing the
kickstarter lever down.

ECA11130

CAUTION:

For maximum engine life, always
warm the engine up before starting
off. Never accelerate hard when the
engine is cold!

5. When the engine is warm, turn the
starter (choke) off.

NOTE:

The engine is warm when it responds
normally to the throttle with the starter
(choke) turned off.

EAU16660

Starting a warm engine

Follow the same procedure as for start­ing a cold engine with the exception
that the starter (choke) is not required
when the engine is warm. Instead, start
the engine with the throttle slightly
open.

NOTE:

If the engine does not start after several
kicks, try again with the throttle 1/4 to
1/2 open.

5

5-1

OPERATION AND IMPORTANT RIDING POINTS

Shifting

1. Shift pedal

2. Neutral position

5

Shifting gears lets you control the
amount of engine power available for
starting off, accelerating, climbing hills,
etc.
The gear positions are shown in the il­lustration.

NOTE:

To shift the transmission into the neu­tral position, press the shift pedal down
repeatedly until it reaches the end of its
travel, and then slightly raise it.

EAU16671

ECA10260

CAUTION:

● Even with the transmission in

the neutral position, do not
coast for long periods of time
with the engine off, and do not
tow the motorcycle for long dis­tances. The transmission is
properly lubricated only when
the engine is running. Inade­quate lubrication may damage
the transmission.

● Always use the clutch while

changing gears to avoid damag­ing the engine, transmission,
and drive train, which are not
designed to withstand the
shock of forced shifting.

EAU16690

To start out and accelerate

1. Pull the clutch lever to disengage
the clutch.

2. Shift the transmission into first
gear.

3. Open the throttle gradually and si­multaneously release the clutch le­ver slowly.

4. Once the motorcycle has reached
a speed high enough to change
gears, close the throttle, and at the
same time, quickly pull the clutch
lever in.

5. Shift the transmission into second
gear. (Make sure not to shift the
transmission into the neutral posi­tion.)

6. Open the throttle halfway and
gradually release the clutch lever.

7. Follow the same procedure when
shifting to the next gear.

EAU16710

To decelerate

1. Close the throttle and apply both
the front and the rear brakes to
slow the motorcycle.

2. Downshift through the gears and
shift the transmission into the neu­tral position when the motorcycle
is almost completely stopped.

5-2

OPERATION AND IMPORTANT RIDING POINTS

EAU41502

Engine break-in

1. Before starting the engine, fill the
fuel tank with a break-in oil-fuel
mixture as follows.

Recommended 2-stroke engine oil:

See page 8-1.

Mixing ratio (gasoline to oil):

15:1

2. Start and warm up the engine.
Check the operation of the controls
and the engine stop button. (See
page 3-1.)

3. Operate the motorcycle in the low­er gears at moderate throttle open­ings for five to eight minutes. Stop
the engine and check the spark
plug condition (see page 6-8); it
will show a rich condition during
break-in.

4. Allow the engine to cool. Restart
the engine and operate the motor­cycle as in the step above for five
minutes. Then, very briefly shift to
the higher gears and check the
full-throttle response. Stop the en­gine and check the spark plug.

5. After again allowing the engine to
cool, restart and run the motor­cycle for five more minutes. Full
throttle and the higher gears may
be used, but sustained full-throttle
operation should be avoided. Stop
the engine and check the spark
plug again.

6. Allow the engine to cool, remove
the cylinder head and cylinder, and
inspect the piston and cylinder.
Remove any high spots on the pis­ton with #600-grit wet sandpaper.
Clean all components and careful­ly reassemble the cylinder head
and cylinder.

EWA10320

WARNING

If you are not familiar with mainte­nance work, have a Yamaha dealer
do it for you.

7. Drain the break-in oil-fuel mixture
from the fuel tank and refill with the
specified mix. (See page 3-3.)

8. Start the engine and check the op­eration of the motorcycle through­out its entire operating range. Stop
the engine and check the spark

plug condition. Restart the motor­cycle and ride it for about 10 to 15
more minutes. The motorcycle will

now be ready to ride normally.
After the engine break-in period, thor­oughly check the motorcycle for loose
parts, oil leakage and any other prob­lems. Be sure to inspect and make ad­justments thoroughly, especially cable
and drive chain slack and loose
spokes. In addition, check all fittings
and fasteners for looseness, and tight­en if necessary.

ECA15560

CAUTION:

● When any of the following parts

have been replaced, they must

be broken in.

Cylinder or crankshaft:

About one hour of break-in op-

eration is necessary.

Piston, rings or transmission

gears:

These parts require about 30

minutes of break-in operation at

half-throttle or less. Observe the

condition of the engine carefully

during operation.

5

5-3

OPERATION AND IMPORTANT RIDING POINTS

● If any engine trouble should oc-

cur during the engine break-in
period, immediately have a
Yamaha dealer check the vehi­cle.

5

EAU17190

Parking

When parking, stop the engine, and
then turn the fuel cock lever to “OFF”.

EWA10310

WARNING

● Since the engine and exhaust

system can become very hot,
park in a place where pedestri­ans or children are not likely to
touch them.

● Do not park on a slope or on soft

ground, otherwise the vehicle
may overturn.

5-4

EAU17240

Safety is an obligation of the owner. Pe­riodic inspection, adjustment and lubri­cation will keep your vehicle in the
safest and most efficient condition pos­sible. The most important points of in­spection, adjustment, and lubrication
are explained on the following pages.
The intervals given in the periodic
maintenance and lubrication chart
should be simply considered as a gen­eral guide under normal riding condi­tions. However, DEPENDING ON THE
WEATHER, TERRAIN, GEOGRAPHI­CAL LOCATION, AND INDIVIDUAL
USE, THE MAINTENANCE INTER­VALS MAY NEED TO BE SHORT­ENED.

EWA10320

WARNING

If you are not familiar with mainte­nance work, have a Yamaha dealer
do it for you.

PERIODIC MAINTENANCE AND MINOR REPAIR

6

6-1

PERIODIC MAINTENANCE AND MINOR REPAIR

EAU41794

Periodic maintenance and lubrication chart

The following chart is intended as a general guide to maintenance and lubrication. Bear in mind that such factors as weather,
terrain, geographical location, and individual usage will alter the required maintenance and lubrication intervals. If you are in
doubt as to what intervals to follow in maintaining and lubricating your motorcycle, consult your Yamaha dealer.

NOTE:

● From the seventh race, repeat the maintenance intervals starting from “Every race”.

● Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical

skills.

NO. ITEM ROUTINE

• Check piston for carbon deposits and cracks or dam-

1

* Piston

6

2*Piston rings

*

3

4 * Cylinder head

Piston pin and small
end bearing

age.

• Clean.

• Replace.

• Check piston ring end gap and rings for damage. √

• Replace.

Check piston pin and small end bearing for damage. √

•

• Replace. √

• Check cylinder head for carbon deposits.

• Clean.

• Check cylinder head gasket for damage.

• Tighten cylinder head bolts if necessary.

• Replace cylinder head gasket.

6-2

After

break-in

√

√

√

Every

race

√

√

√

√

Every

third race

√√

Every

fifth raceAsrequired

√√

√

PERIODIC MAINTENANCE AND MINOR REPAIR

NO. ITEM ROUTINE

• Check cylinder for score marks or wear.

5*Cylinder

6 * Clutch

7 * Transmission

Shift forks, guide bars,

8 *

shift cam

Rotor nut

9 *

(flywheel magneto)

10 * Kickstarter system

11 * Exhaust system

12 * Crankshaft

• Clean.

• Replace. √

• Check clutch housing, friction plates, clutch plates

and clutch springs for wear or damage.

• Adjust.

• Replace. √

• Change the transmission oil. √

• Check transmission for damage. √

• Replace bearings. √

• Check all parts for wear and damage.

• Replace if necessary.

• Tighten. √√

• Check idle gear for damage.

• Replace if necessary.

• Check exhaust pipe and muffler for carbon deposits. √√

• Clean. √

• Check crankshaft for carbon deposits and damage.

• Clean.

After

break-in

√

Every

race

√

√√

Every

third race

Every

fifth raceAsrequired

√

√

√

√
√

√
√

6

6-3

PERIODIC MAINTENANCE AND MINOR REPAIR

NO. ITEM ROUTINE

13 * Carburetor

14 Spark plug

15 Drive chain

16 * Cooling system

6

17 * Chassis fasteners

18 * Air filter element

19 * Frame • Clean and check for damage. √
20 * Fuel line • Clean and check for leakage. √√

• Check carburetor settings and for obstructions. √

• Adjust and clean. √

• Check condition.

• Clean and regap.

• Replace. √

• Check chain slack, alignment and condition.

• Adjust and thoroughly lubricate chain with Yamaha

chain and cable lube or equivalent.

• Replace. √

• Check coolant level and for leakage. √√

• Check hoses for cracks or damage. √

• Check radiator cap spring operation. √

• Change coolant. Every 2 years √

• Check all chassis fitting and fasteners.

• Correct or tighten if necessary.

• Clean.

• Replace. √

After

break-in

√

√

√

√

Every

race

√
√

√

√

√

√

√

Every

third race

fifth raceAsrequired

Every

6-4

PERIODIC MAINTENANCE AND MINOR REPAIR

NO. ITEM ROUTINE

• Adjust lever position and pedal height.

• Lubricate pivot points.

• Check brake disk surface.

• Check fluid level and for leakage.

21 * Brakes

22 * Front fork

Shock absorber assem-

23 *

bly

• Tighten brake disk bolts, caliper bolts, master cylinder
bolts and union bolts.

• Replace brake pads. √

• Replace brake fluid. Every year √

• Check operation and for oil leakage.

•

Adjust if necessary.
Clean dust seal and lubricate with lithium-soap-based

•

grease.

• Replace fork oil.

• Replace oil seals.

• Check operation and adjust.

• Tighten if necessary.

• Lubricate with molybdenum disulfide grease. √

After

break-in

√

√

√√

Every

race

√

√

√√

Every

third race

Every

fifth raceAsrequired

√

√

(After

washing

the
motorcycle
or riding in

the rain)

6

6-5

PERIODIC MAINTENANCE AND MINOR REPAIR

NO. ITEM ROUTINE

Drive chain roller and

24 *

support guide

25 * Rear suspension

26 * Steering head

27 * Tires and wheels

6

Moving parts and ca-

28 *

bles

Throttle grip housing

29 *

and cable

• Check for wear or damage.

• Replace if necessary.

• Check operation and tighten if necessary.

• Lubricate with molybdenum disulfide grease.

• Check operation, free play, and tighten if necessary.

• Clean and lubricate with lithium-soap-based grease.

• Replace bearings.

• Check tire air pressure, wheel runout, spokes for

looseness, and tires for wear.

• Tighten sprocket bolts if necessary.

• Check wheel bearings for looseness.

• Lubricate wheel bearings with lithium-soap-based

grease.

• Replace wheel bearings.

• Lubricate.

• Check operation and free play.

• Adjust the throttle cable free play if necessary.

• Lubricate the throttle grip housing and cable.

After

break-in

√√
√
√

√

√

√

Every

race

√
√

√

√

√

√√

Every

third race

√

√

Every

fifth raceAsrequired

√

√

√

√

EAU42010

NOTE:

● Hydraulic brake service

• Regularly check and, if necessary, correct the brake fluid level.

6-6

PERIODIC MAINTENANCE AND MINOR REPAIR

• Every two years replace the internal components of the brake master cylinders and calipers, and change the brake
fluid.

• Replace the brake hoses every four years and if cracked or damaged.

6

6-7

PERIODIC MAINTENANCE AND MINOR REPAIR

Checking the spark plug

The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plug should be removed and checked
in accordance with the periodic mainte­nance and lubrication chart. In addition,
the condition of the spark plug can re­veal the condition of the engine.

To remove the spark plug

1. Remove the spark plug cap.

6

1. Spark plug cap

2. Remove the spark plug as shown,
with a spark plug wrench available
at a Yamaha dealer.

EAU19612

1. Spark plug wrench

To check the spark plug

1. Check that the porcelain insulator
around the center electrode of the
spark plug is a medium-to-light tan
(the ideal color when the vehicle is
ridden normally).

NOTE:

If the spark plug shows a distinctly dif­ferent color, the engine could be oper­ating improperly. Do not attempt to
diagnose such problems yourself. In­stead, have a Yamaha dealer check
the vehicle.

2. Check the spark plug for electrode
erosion and excessive carbon or
other deposits, and replace it if
necessary.

Specified spark plug:

NGK/BR10EG

To install the spark plug

1. Measure the spark plug gap with a
wire thickness gauge and, if nec­essary, adjust the gap to specifica­tion.

1. Spark plug gap

Spark plug gap:

0.5–0.6 mm (0.020–0.024 in)

6-8

PERIODIC MAINTENANCE AND MINOR REPAIR

2. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.

3. Install the spark plug with the
spark plug wrench, and then tight­en it to the specified torque.

Tightening torque:

Spark plug:

20 Nm (2.0 m·kgf, 14 ft·lbf)

NOTE:

If a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4–1/2 turn
past finger tight. However, the spark
plug should be tightened to the speci­fied torque as soon as possible.

4. Install the spark plug cap.

EAU41441

Transmission oil

The transmission oil must be checked
for oil leakage before each ride. If any
leakage is found, have a Yamaha deal­er check and repair the motorcycle. In
addition, the transmission oil must be
changed at the intervals specified in the
periodic maintenance and lubrication
chart.

1. Start the engine, warm it up for
several minutes, and then turn it
off.

2. Place the motorcycle on a level
surface and hold it in an upright po­sition.

3. Place an oil pan under the trans­mission to collect the used oil.

4. Remove the oil filler cap and drain
bolt to drain the oil from the trans­mission.

1. Oil filler cap

2. Transmission oil drain bolt

5. Install the transmission oil drain
bolt, and then tighten it to the spec­ified torque.

6

Tightening torque:

Transmission oil drain bolt:

10 Nm (1.0 m·kgf, 7.2 ft·lbf)

6. Add the specified amount of the
recommended transmission oil,
and then install and tighten the oil
filler cap.

6-9

Recommended transmission oil:

See page 8-1.

Oil change quantity:

0.50 L (0.53 US qt) (0.44 Imp.qt)

PERIODIC MAINTENANCE AND MINOR REPAIR

CAUTION:

● In order to prevent clutch slip-

page (since the transmission oil
also lubricates the clutch), do
not mix any chemical additives.
Do not use oils with a diesel
specification of “CD” or oils of a
higher quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.

● Make sure that no foreign mate-

rial enters the transmission.

7. Start the engine, and then let it idle

6

for several minutes while checking
the transmission for oil leakage. If
oil is leaking, immediately turn the
engine off and check for the cause.

ECA10452

EAU20070

Coolant

The coolant level should be checked
before each ride. In addition, the cool­ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.

EAUM1291

To check the coolant level

1. Place the vehicle on a level sur­face and hold it in an upright posi­tion.

EWA10380

WARNING

Never attempt to remove the radiator
cap when the engine is hot.

2. Remove the radiator cap and
check the coolant level in the radi­ator.

1. Radiator cap

NOTE:

● The coolant level must be checked

on a cold engine since the level
varies with engine temperature.

● Make sure that the vehicle is posi-

tioned straight up when checking
the coolant level. A slight tilt to the
side can result in a false reading.

NOTE:

The coolant should be at the brim of the
radiator filler. The level will change with
variation of engine temperature.

6-10

PERIODIC MAINTENANCE AND MINOR REPAIR

1. Correct coolant level

3. If the coolant is below this level,
add coolant, and then install the
radiator cap.

NOTE:

If the engine overheats, see page 6-30
for further instructions.

EAUM1311

To change the coolant

1. Place the vehicle on a level sur­face and let the engine cool if nec­essary.

2. Place a container under the engine
to collect the used coolant.

EWA10380

WARNING

Never attempt to remove the radiator
cap when the engine is hot.

3. Remove the radiator cap.

1. Radiator cap

4. Remove the coolant drain bolt to
drain the cooling system.

5. After the coolant is completely
drained, thoroughly flush the cool­ing system with clean tap water.

6. Install the coolant drain bolt, and
then tighten it to the specified
torque.

NOTE:

Check the washer for damage and re­place it if necessary.

Tightening torque:

Coolant drain bolt:

10 Nm (1.0 m·kgf, 7.2 ft·lbf)

7. Pour the recommended coolant
into the radiator until it is full.

Antifreeze/water mixture ratio:

1:1

Recommended antifreeze:

High-quality ethylene glycol anti­freeze containing corrosion inhibitors
for aluminum engines

Coolant quantity:

Radiator capacity (including all
routes):

0.54 L (0.57 US qt) (0.48 Imp.qt)

6

1. Coolant drain bolt

6-11

PERIODIC MAINTENANCE AND MINOR REPAIR

CAUTION:

● If coolant is not available, use

distilled water or soft tap water
instead. Do not use hard water
or salt water since it is harmful
to the engine.

● If water has been used instead

of coolant, replace it with cool­ant as soon as possible, other­wise the cooling system will not
be protected against frost and
corrosion.

● If water has been added to the

coolant, have a Yamaha dealer

6

check the antifreeze content of
the coolant as soon as possible,
otherwise the effectiveness of
the coolant will be reduced.

8. Install the radiator cap, start the
engine, let it idle for several min­utes, and then turn it off.

9. Remove the radiator cap to check
the coolant level in the radiator. If
necessary, add sufficient coolant
until it reaches the top of the radia­tor, and then install the radiator
cap.

ECA10471

10. Start the engine, and then check
the vehicle for coolant leakage. If
coolant is leaking, have a Yamaha
dealer check the cooling system.

EAU41431

Cleaning the air filter element

The air filter element should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
Clean the air filter element more fre­quently if you are riding in unusually
wet or dusty areas.

1. Remove the seat. (See page 3-6.)

2. Remove the air filter case cover as
shown.

1. Air filter case cover

6-12

3. Remove the air filter element by
removing the wing bolt and wash­er.

1. Wing bolt

2. Washer

3. Sponge material

4. Remove the sponge material from
the air filter element frame.

PERIODIC MAINTENANCE AND MINOR REPAIR

NOTE:

The sponge material should be wet but
not dripping.

Recommended oil:

Yamaha foam air filter oil or other
quality foam air filter oil

7. Pull the sponge material over the

1. Sponge material

2. Air filter element frame

5. Clean the sponge material with
solvent, and then squeeze the re­maining solvent out.

6. Apply oil of the recommended type
to the entire surface of the sponge
material, and then squeeze the ex­cess oil out.

air filter element frame.

8. Insert the air filter element into the
air filter case with the projection
facing upward, and then install the
washer and wing bolt.

1. Sponge material

2. Projection

6

6-13

PERIODIC MAINTENANCE AND MINOR REPAIR

CAUTION:

● Make sure that the air filter ele-

ment is properly seated in the
air filter case.

● The engine should never be op-

erated without the air filter ele­ment installed, otherwise the
piston(s) and/or cylinder(s) may
become excessively worn.

9. Install the air filter case cover in the
original position as shown.

6

10. Install the seat.

ECA10480

EAU39930

Adjusting the carburetor

The carburetor is an important part of
the engine and requires very sophisti­cated adjustment. Therefore, most car­buretor adjustments should be left to a
Yamaha dealer, who has the neces­sary professional knowledge and expe­rience. The adjustment described in the
following section, however, may be ser­viced by the owner as part of routine
maintenance.

ECA10550

CAUTION:

The carburetor has been set and ex­tensively tested at the Yamaha fac­tory. Changing these settings
without sufficient technical knowl­edge may result in poor perfor­mance of or damage to the engine.

EAU21370

Adjusting the throttle cable
free play

1. Throttle cable free play

The throttle cable free play should mea­sure 3.0–5.0 mm (0.12–0.20 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces­sary, adjust it as follows.

NOTE:

The engine idling speed must be cor­rectly adjusted before checking and ad­justing the throttle cable free play.

1. Loosen the locknut.

6-14

PERIODIC MAINTENANCE AND MINOR REPAIR

2. To increase the throttle cable free
play, turn the adjusting nut in direc­tion (a). To decrease the throttle
cable free play, turn the adjusting
nut in direction (b).

1. Locknut

2. Throttle cable free play adjusting nut

3. Tighten the locknut.

EAU41820

Tires

To maximize the performance, durabil­ity, and safe operation of your motor­cycle, note the following points
regarding the specified tires.

Tire air pressure

The tire air pressure should be checked
and, if necessary, adjusted before each
ride.

EWA14380

WARNING

● The tire air pressure must be

checked and adjusted on cold
tires (i.e., when the temperature
of the tires equals the ambient
temperature).

● The tire air pressure must be ad-

justed in accordance with the
weight of the rider, the riding
speed, and the riding condi­tions.

Standard tire air pressure:

Front:

100 kPa (15 psi) (1.00 kgf/cm²)

Rear:

100 kPa (15 psi) (1.00 kgf/cm²)

Tire inspection

2

1

1. Tire sidewall

2. Tire tread depth

The tires must be checked before each
ride.

ECA15580

CAUTION:

● Be sure the bead stoppers are

tightened. Loose bead stoppers
will cause the tire to slip off the
rim if tire pressure is too low.

● Be sure the valve stem is posi-

tioned straight. A tilted valve
stem indicates that the tire has
slipped from its original posi­tion on the rim. Rotate the tire
so that the valve stem is posi­tioned straight.

6

6-15

PERIODIC MAINTENANCE AND MINOR REPAIR

If the center tread depth reaches the
specified limit, if the tire has a nail or
glass fragments in it, or if the sidewall is
cracked, have a Yamaha dealer re­place the tire immediately.

Minimum tire tread depth (front and
rear):

4.0 mm (0.16 in)

Tire information

This motorcycle is equipped with spoke
wheels and tube tires.

WARNING

6

● The front and rear tires should

be of the same make and de­sign, otherwise the handling
characteristics of the vehicle
cannot be guaranteed.

● After extensive tests, only the

tires listed below have been ap­proved for this model by
Yamaha Motor Co., Ltd.

EWA10460

Front tire:

Size:

YZ85 70/100-17 40M
YZ85LW 70/100-19 42M
YZ85LWW 70/100-19 42M
YZ85W 70/100-17 40M
YZ85W1 70/100-17 40M

Manufacturer/model:

YZ85 DUNLOP/D739FA (ZAF)
YZ85 DUNLOP/D756F
(AUT)(BEL)(CHE)(DEU)(DNK)(ES
P)(FIN)(FRA)(GBR)(GRC)(IRL)(N
LD)(NOR)(PRT)(SWE)
YZ85LW DUNLOP/D756F
YZ85LWW DUNLOP/D756F
YZ85W DUNLOP/D756F
YZ85W1 DUNLOP/D756F

Rear tire:

Size:

YZ85 90/100-14 49M
YZ85LW 90/100-16 52M
YZ85LWW 90/100-16 52M
YZ85W 90/100-14 49M
YZ85W1 90/100-14 49M

Manufacturer/model:

DUNLOP/D756

EWA14390

WARNING

● Have a Yamaha dealer replace

excessively worn tires. Operat­ing the motorcycle with exces-

sively worn tires decreases
riding stability and can lead to
loss of control.

● The replacement of all wheel-

and brake-related parts, includ­ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl­edge and experience.

● It is not recommended to patch

a punctured tube. If unavoid­able, however, patch the tube
very carefully and replace it as
soon as possible with a high­quality product.

6-16

PERIODIC MAINTENANCE AND MINOR REPAIR

EAU21940

Spoke wheels

To maximize the performance, durabil­ity, and safe operation of your motor­cycle, note the following points
regarding the specified wheels.

● The wheel rims should be checked

for cracks, bends or warpage, and
the spokes for looseness or dam­age before each ride. If any dam­age is found, have a Yamaha
dealer replace the wheel. Do not
attempt even the smallest repair to
the wheel. A deformed or cracked
wheel must be replaced.

● The wheel should be balanced

whenever either the tire or wheel
has been changed or replaced. An
unbalanced wheel can result in
poor performance, adverse han­dling characteristics, and a short­ened tire life.

● Ride at moderate speeds after

changing a tire since the tire sur­face must first be “broken in” for it
to develop its optimal characteris­tics.

EAU40431

Accessories and replacement
parts

EWA14481

WARNING

The accessories or replacement
parts you choose for your vehicle
should be designed specifically for
this model, and they must be se­curely mounted to maintain the in­herent stability of the original
design. Genuine Yamaha Parts and
Accessories are designed and test­ed to be compatible with your vehi­cle. Yamaha recommends the use of
Genuine Yamaha Parts and Acces­sories before making a purchase.
Use of non-Yamaha-approved ac­cessories or replacement parts may
cause loss of handling stability and
riding safety. Since Yamaha cannot
control the quality of accessories or
parts manufactured by other compa­nies, Yamaha cannot be held liable
for any consequences caused by
the use of items which have not
been approved by Yamaha.

EAU22031

Adjusting the clutch lever free
play

1. Clutch lever free play

2. Locknut (clutch lever)

3. Adjusting bolt

6

The clutch lever free play should mea­sure 10.0–15.0 mm (0.39–0.59 in) as
shown. Periodically check the clutch le­ver free play and, if necessary, adjust it
as follows.

1. Loosen the locknut at the clutch le­ver.

2. To increase the clutch lever free
play, turn the adjusting bolt in di­rection (a). To decrease the clutch
lever free play, turn the adjusting
bolt in direction (b).

6-17

PERIODIC MAINTENANCE AND MINOR REPAIR

3. If the specified clutch lever free
play could be obtained as de­scribed above, tighten the locknut
and skip the rest of the procedure,
otherwise, proceed as follows.

4. Fully turn the adjusting bolt in di­rection (a) to loosen the clutch ca­ble.

5. Loosen the locknut further down
the clutch cable.

6

1. Locknut (clutch cable)

2. Adjusting nut

6. To increase the clutch lever free
play, turn the adjusting nut in direc­tion (a). To decrease the clutch le­ver free play, turn the adjusting nut
in direction (b).

7. Tighten both locknuts.

EAU22390

Checking the front and rear
brake pads

The front and rear brake pads must be
checked for wear at the intervals spec­ified in the periodic maintenance and
lubrication chart.

EAU22400

Front brake pads

1. Lining thickness

Check each front brake pad for dam­age and measure the lining thickness. If
a brake pad is damaged or if the lining
thickness is less than 0.8 mm (0.03 in),
have a Yamaha dealer replace the
brake pads as a set.

Rear brake pads

EAU22500

1. Lining thickness

Check each rear brake pad for damage
and measure the lining thickness. If a
brake pad is damaged or if the lining
thickness is less than 1.0 mm (0.04 in),
have a Yamaha dealer replace the
brake pads as a set.

6-18

PERIODIC MAINTENANCE AND MINOR REPAIR

EAU22580

Checking the brake fluid level

Front brake

1. Minimum level mark

Rear brake

1. Minimum level mark

Before riding, check that the brake fluid
is above the minimum level mark and
replenish if necessary. A low brake fluid
level may indicate worn brake pads
and/or brake system leakage. If the
brake fluid level is low, be sure to check
the brake pads for wear and the brake
system for leakage.
Observe these precautions:

● When checking the fluid level,

make sure that the top of the brake
fluid reservoir is level.

● Use only the recommended quality

brake fluid, otherwise the rubber
seals may deteriorate, causing
leakage and poor braking perfor­mance.

Recommended brake fluid:

DOT 4

● Refill with the same type of brake

fluid. Mixing fluids may result in a
harmful chemical reaction and
lead to poor braking performance.

● Be careful that water does not en-

ter the brake fluid reservoir when
refilling. Water will significantly
lower the boiling point of the fluid
and may result in vapor lock.

● Brake fluid may deteriorate paint-

ed surfaces or plastic parts. Al­ways clean up spilled fluid
immediately.

● As the brake pads wear, it is nor-

mal for the brake fluid level to grad­ually go down. However, if the
brake fluid level goes down sud­denly, have a Yamaha dealer
check the cause.

6

Insufficient brake fluid may allow air to
enter the brake system, possibly caus­ing it to become ineffective.

6-19

PERIODIC MAINTENANCE AND MINOR REPAIR

Changing the brake fluid

Have a Yamaha dealer change the
brake fluid at the intervals specified in
the NOTE after the periodic mainte­nance and lubrication chart. In addition,
have the oil seals of the master cylin­ders and calipers as well as the brake
hoses replaced at the intervals listed
below or whenever they are damaged
or leaking.

● Oil seals: Replace every two

years.

● Brake hoses: Replace every four

years.

6

EAU22730

EAU22760

Drive chain slack

The drive chain slack should be
checked before each ride and adjusted
if necessary.

EAU41410

To check the drive chain slack

1. Install the removable sidestand
and place the motorcycle on it.

NOTE:

When checking and adjusting the drive
chain slack, there should be no weight
on the motorcycle.

2. Shift the transmission into the neu­tral position.

3. Move the rear wheel by pushing
the motorcycle to locate the tight­est portion of the drive chain, and
then measure the drive chain slack
as shown.

Drive chain slack:

35.0–45.0 mm (1.38–1.77 in)

1. Drive chain slack

4. If the drive chain slack is incorrect,
adjust it as follows.

EAU41480

To adjust the drive chain slack

1. Loosen the axle nut and the lock­nut on each side of the swingarm.

2. To tighten the drive chain, turn the
adjusting bolt on each side of the
swingarm in direction (a). To loos­en the drive chain, turn the adjust­ing bolt on each side of the
swingarm in direction (b), and then
push the rear wheel forward.

6-20

PERIODIC MAINTENANCE AND MINOR REPAIR

NOTE:

Using the alignment marks on each
chain puller, make sure that both chain
pullers are in the same position for
proper wheel alignment.

1. Axle nut

2. Locknut

3. Drive chain slack adjusting bolt

4. Alignment marks

ECA10570

CAUTION:

Improper drive chain slack will over­load the engine as well as other vital
parts of the motorcycle and can lead
to chain slippage or breakage. To
prevent this from occurring, keep
the drive chain slack within the
specified limits.

3. Tighten both locknuts and the axle
nut to the specified torques.

Tightening torques:

Locknut:

16 Nm (1.6 m·kgf, 11 ft·lbf)

Axle nut:

90 Nm (9.0 m·kgf, 65 ft·lbf)

EAU23013

Cleaning and lubricating the
drive chain

The drive chain must be cleaned and
lubricated at the intervals specified in
the periodic maintenance and lubrica­tion chart, otherwise it will quickly wear
out, especially when riding in dusty or
wet areas. Service the drive chain as
follows.

ECA10581

CAUTION:

The drive chain must be lubricated
after washing the motorcycle and
riding in the rain.

1. Remove all dirt and mud from the
drive chain with a brush or cloth.

NOTE:

For a thorough cleaning, have a
Yamaha dealer remove the drive chain
and soak it in solvent.

2. Spray Yamaha Chain and Cable
Lube or a high-quality spray-type
drive chain lubricant on both sides
and on the middle of the chain,

6

6-21

PERIODIC MAINTENANCE AND MINOR REPAIR

making sure that all side plates
and rollers have been sufficiently
oiled.

EAU41840

Checking and lubricating the
cables

The operation of all control cables and
the condition of the cables should be
checked before each ride, and the ca­bles and cable ends should be lubricat­ed if necessary. If a cable is damaged

Checking and lubricating the
throttle grip and cable

The operation of the throttle grip should
be checked before each ride. In addi­tion, the cable should be lubricated at
the intervals specified in the periodic
maintenance chart.

EAU23111

or does not move smoothly, have a
Yamaha dealer check or replace it.

Recommended lubricant:

Yamaha Chain and Cable Lube or
engine oil SAE 10W-30 (API SE)

EWA10710

6

WARNING

Damage to the outer housing of ca­bles may result in internal rusting
and cause interference with cable
movement. Replace damaged ca­bles as soon as possible to prevent
unsafe conditions.

6-22

PERIODIC MAINTENANCE AND MINOR REPAIR

EAU23131

Checking and lubricating the
brake and shift pedals

The operation of the brake and shift
pedals should be checked before each
ride, and the pedal pivots should be lu­bricated if necessary.

Recommended lubricant:

Lithium-soap-based grease (all-pur­pose grease)

EAU23140

Checking and lubricating the
brake and clutch levers

Brake lever

Clutch lever

Recommended lubricant:

Lithium-soap-based grease (all-pur­pose grease)

6

The operation of the brake and clutch
levers should be checked before each
ride, and the lever pivots should be lu­bricated if necessary.

6-23

PERIODIC MAINTENANCE AND MINOR REPAIR

Lubricating the swingarm piv­ots

The swingarm pivots must be lubricat­ed at the intervals specified in the peri­odic maintenance and lubrication chart.

6

Recommended lubricant:

Lithium-soap-based grease

EAUM1650

EAU23250

Lubricating the rear suspen­sion

The pivoting points of the rear suspen­sion must be lubricated at the intervals
specified in the periodic maintenance
and lubrication chart.

Recommended lubricant:

Lithium-soap-based grease

EAU23271

Checking the front fork

The condition and operation of the front
fork must be checked as follows at the
intervals specified in the periodic main­tenance and lubrication chart.

To check the condition

EWA10750

WARNING

Securely support the vehicle so that
there is no danger of it falling over.

Check the inner tubes for scratches,
damage and excessive oil leakage.

To check the operation

1. Place the vehicle on a level sur­face and hold it in an upright posi­tion.

2. While applying the front brake,
push down hard on the handlebars
several times to check if the front
fork compresses and rebounds
smoothly.

6-24

ECA10590

CAUTION:

If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or re­pair it.

PERIODIC MAINTENANCE AND MINOR REPAIR

EAU23280

Checking the steering

Worn or loose steering bearings may
cause danger. Therefore, the operation
of the steering must be checked as fol­lows at the intervals specified in the pe­riodic maintenance and lubrication
chart.

1. Place a stand under the engine to
raise the front wheel off the
ground.

EWA10750

WARNING

Securely support the vehicle so that
there is no danger of it falling over.

2. Hold the lower ends of the front
fork legs and try to move them for­ward and backward. If any free
play can be felt, have a Yamaha
dealer check or repair the steering.

6

6-25

PERIODIC MAINTENANCE AND MINOR REPAIR

Checking the wheel bearings

The front and rear wheel bearings must
be checked at the intervals specified in
the periodic maintenance and lubrica­tion chart. If there is play in the wheel
hub or if the wheel does not turn
smoothly, have a Yamaha dealer check
the wheel bearings.

6

EAU23290

EAU24350

Supporting the motorcycle

Since this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear
wheel or performing other maintenance
requiring the motorcycle to stand up­right. Check that the motorcycle is in a
stable and level position before starting
any maintenance. A strong wooden
box can be placed under the engine for
added stability.

To service the front wheel

1. Stabilize the rear of the motorcycle
by using a motorcycle stand or, if
an additional motorcycle stand is
not available, by placing a jack un­der the frame in front of the rear
wheel.

2. Raise the front wheel off the
ground by using a motorcycle
stand.

To service the rear wheel

Raise the rear wheel off the ground by
using a motorcycle stand or, if a motor­cycle stand is not available, by placing

a jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.

6-26

PERIODIC MAINTENANCE AND MINOR REPAIR

EAU24360

Front wheel

EAU41340

To remove the front wheel

EWA10820

WARNING

● It is advisable to have a Yamaha

dealer service the wheel.

● Securely support the motor-

cycle so that there is no danger
of it falling over.

1. Loosen the axle nut.

1. Washer

2. Axle nut

4. Pull the wheel axle out, and then
remove the wheel.

1. Wheel axle

EAU41420

To install the front wheel

1. Lift the wheel up between the fork
legs.

2. Insert the wheel axle from the right
side.

3. Lower the front wheel so that it is
on the ground.

4. Install the washer and axle nut,
and then tighten the axle nut to the
specified torque.

EAU25080

Rear wheel

EAU41310

To remove the rear wheel

EWA10820

WARNING

● It is advisable to have a Yamaha

dealer service the wheel.

● Securely support the motor-

cycle so that there is no danger
of it falling over.

1. Loosen the axle nut.

2. Lift the rear wheel off the ground
according to the procedure on
page 6-26.

3. Loosen the locknut and drive chain
adjusting bolt on each side of the
swingarm.

4. Remove the axle nut and washer.

6

2. Lift the front wheel off the ground
according to the procedure on
page 6-26.

3. Remove the axle nut and washer.

Tightening torque:

Axle nut:

70 Nm (7.0 m·kgf, 50 ft·lbf)

6-27

PERIODIC MAINTENANCE AND MINOR REPAIR

NOTE:

● Make sure that the retainer on the

swingarm is inserted into the slot in
the brake caliper bracket.

● Make sure that there is enough

space between the brake pads be­fore installing the wheel.

1. Axle nut

2. Washer

3. Locknut

4. Drive chain slack adjusting bolt

5. Push the wheel forward, and then

6

remove the drive chain from the
rear sprocket.

NOTE:

● If the drive chain is difficult to re-

move, remove the wheel axle first,
and then lift the wheel upward
enough to remove the drive chain
from the rear sprocket.

● The drive chain cannot be disas-

sembled.

6. While supporting the brake caliper
and slightly lifting the wheel, pull
the wheel axle out.

1. Wheel axle

NOTE:

A rubber mallet may be useful to tap the
wheel axle out.

7. Remove the wheel.

ECA11070

CAUTION:

Do not apply the brake after the
wheel has been removed together
with the brake disc, otherwise the
brake pads will be forced shut.

EAU41320

To install the rear wheel

1. Install the wheel and the brake cal­iper bracket by inserting the wheel
axle from the right-hand side.

6-28

1. Retainer

2. Slot

2. Install the drive chain onto the rear
sprocket.

3. Install the washer and axle nut,
and then lower the rear wheel so
that it is on the ground.

4. Adjust the drive chain slack. (See
page 6-20.)

5. Tighten the axle nut to the speci­fied torque.

PERIODIC MAINTENANCE AND MINOR REPAIR

Tightening torque:

Axle nut:

90 Nm (9.0 m·kgf, 65 ft·lbf)

EAU25870

Troubleshooting

Although Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur dur­ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting charts
represent quick and easy procedures
for checking these vital systems your­self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace­ment parts. Imitation parts may look like
Yamaha parts, but they are often inferi­or, have a shorter service life and can
lead to expensive repair bills.

6

6-29

PERIODIC MAINTENANCE AND MINOR REPAIR

Troubleshooting charts

EAU41491

Starting problems or poor engine performance

WARNING

Keep away open flames and do not smoke while checking or working on the fuel system.

1. Fuel

Check the fuel level in
the fuel tank.

There is
enough fuel.

There is
no fuel.

Check the compression.

Supply fuel.

The engine does not start.
Check the compression.

6

2. Compression

Operate the kickstarter.

3. Ignition

Remove the spark plug
and check the electrodes.

There is compression.

There is
no compression.

Wet

Dry

Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.

Have a Yamaha dealer check the vehicle.

Check the ignition.

Have a Yamaha dealer
check the vehicle.

EWA10840

Open the throttle halfway and operate
the kickstarter.

The engine does not start.
Have a Yamaha dealer check the vehicle.

6-30

PERIODIC MAINTENANCE AND MINOR REPAIR

Engine overheating

EWAT1040

WARNING

● Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be

blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.

● Place a thick rag, like a towel, over the radiator cap, and then slowly rotate the cap counterclockwise to the de-

tent to allow any residual pressure to escape. When the hissing sound has stopped, press down on the cap
while turning it counterclockwise, and then remove the cap.

Wait until the
engine has cooled.

Check the coolant level in the
radiator.

The coolant level is low.
Check the cooling system
for leakage.

The coolant level
is OK.

There is
leakage.

There is
no leakage.

Start the engine. If the engine overheats again, have a

Yamaha dealer check

Have a Yamaha dealer check

and repair the cooling system.

Add coolant. (See NOTE.)

and repair the cooling system.

NOTE:

If coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended coolant
as soon as possible.

6

6-31

MOTORCYCLE CARE AND STORAGE

Care

While the open design of a motorcycle
reveals the attractiveness of the tech­nology, it also makes it more vulnera­ble. Rust and corrosion can develop
even if high-quality components are
used. A rusty exhaust pipe may go un­noticed on a car, however, it detracts
from the overall appearance of a motor­cycle. Frequent and proper care does
not only comply with the terms of the
warranty, but it will also keep your
motorcycle looking good, extend its life
and optimize its performance.

Before cleaning

1. Cover the muffler outlet with a

7

plastic bag after the engine has
cooled down.

2. Make sure that all caps and covers
as well as all electrical couplers
and connectors, including the
spark plug cap, are tightly in­stalled.

3. Remove extremely stubborn dirt,
like oil burnt onto the crankcase,
with a degreasing agent and a
brush, but never apply such prod-

EAU41351

ucts onto seals, gaskets, sprock­ets, the drive chain and wheel
axles. Always rinse the dirt and de­greaser off with water.

Cleaning

ECA10770

CAUTION:

● Avoid using strong acidic wheel

cleaners, especially on spoked
wheels. If such products are
used on hard-to-remove dirt, do
not leave the cleaner on the af­fected area any longer than in­structed. Also, thoroughly rinse
the area off with water, immedi­ately dry it, and then apply a cor­rosion protection spray.

● Improper cleaning can damage

windshields, cowlings, panels
and other plastic parts. Use only
a soft, clean cloth or sponge
with mild detergent and water to
clean plastic.

● Do not use any harsh chemical

products on plastic parts. Be
sure to avoid using cloths or
sponges which have been in
contact with strong or abrasive

7-1

cleaning products, solvent or
thinner, fuel (gasoline), rust re­movers or inhibitors, brake flu­id, antifreeze or electrolyte.

● Do not use high-pressure wash-

ers or steam-jet cleaners since
they cause water seepage and
deterioration in the following ar­eas: seals (of wheel and swing­arm bearings, fork and brakes),
electric components (couplers,
connectors, instruments,
switches and lights), breather
hoses and vents.

● For motorcycles equipped with

a windshield: Do not use strong
cleaners or hard sponges as
they will cause dulling or
scratching. Some cleaning com­pounds for plastic may leave
scratches on the windshield.
Test the product on a small hid­den part of the windshield to
make sure that it does not leave
any marks. If the windshield is
scratched, use a quality plastic
polishing compound after
washing.

MOTORCYCLE CARE AND STORAGE

After normal use
Remove dirt with warm water, a mild
detergent, and a soft, clean sponge,
and then rinse thoroughly with clean
water. Use a toothbrush or bottlebrush
for hard-to-reach areas. Stubborn dirt
and insects will come off more easily if
the area is covered with a wet cloth for
a few minutes before cleaning.
After riding in the rain or near the sea
Since sea salt is extremely corrosive,
carry out the following steps after each
ride in the rain or near the sea.

1. Clean the motorcycle with cold wa­ter and a mild detergent, after the
engine has cooled down.

ECA10790

CAUTION:

Do not use warm water since it in­creases the corrosive action of the
salt.

2. Apply a corrosion protection spray
on all metal, including chrome- and
nickel-plated, surfaces to prevent
corrosion.

After cleaning

1. Dry the motorcycle with a chamois
or an absorbing cloth.

2. Immediately dry the drive chain
and lubricate it to prevent it from
rusting.

3. Use a chrome polish to shine
chrome, aluminum and stainless­steel parts, including the exhaust
system. (Even the thermally in­duced discoloring of stainless­steel exhaust systems can be re­moved through polishing.)

4. To prevent corrosion, it is recom­mended to apply a corrosion pro­tection spray on all metal,
including chrome- and nickel-plat­ed, surfaces.

5. Use spray oil as a universal clean­er to remove any remaining dirt.

6. Touch up minor paint damage
caused by stones, etc.

7. Wax all painted surfaces.

8. Let the motorcycle dry completely
before storing or covering it.

EWA11130

WARNING

● Make sure that there is no oil or

wax on the brakes or tires.

7-2

● If necessary, clean the brake

discs and brake linings with a
regular brake disc cleaner or ac­etone, and wash the tires with
warm water and a mild deter­gent. Before riding at higher
speeds, test the motorcycle’s
braking performance and cor­nering behavior.

ECA10800

CAUTION:

● Apply spray oil and wax spar-

ingly and make sure to wipe off
any excess.

● Never apply oil or wax to any

rubber and plastic parts, but
treat them with a suitable care
product.

● Avoid using abrasive polishing

compounds as they will wear
away the paint.

NOTE:

Consult a Yamaha dealer for advice on
what products to use.

7

MOTORCYCLE CARE AND STORAGE

Storage

Short-term

Always store your motorcycle in a cool,
dry place and, if necessary, protect it
against dust with a porous cover.

CAUTION:

● Storing the motorcycle in a

poorly ventilated room or cover­ing it with a tarp, while it is still
wet, will allow water and humid­ity to seep in and cause rust.

● To prevent corrosion, avoid

damp cellars, stables (because
of the presence of ammonia)

7

and areas where strong chemi­cals are stored.

Long-term

Before storing your motorcycle for sev­eral months:

1. Follow all the instructions in the
“Care” section of this chapter.

2. For motorcycles equipped with a
fuel cock that has an “OFF” posi­tion: Turn the fuel cock lever to
“OFF”.

EAU41511

ECA10810

3. Drain the fuel tank and fuel lines,
and the carburetor float chamber
by loosening the drain bolt; this will
prevent fuel deposits from building
up.

4. Perform the following steps to pro­tect the cylinder, piston rings, etc.
from corrosion.
a. Remove the spark plug cap

and spark plug.

b. Pour a teaspoonful of engine oil

into the spark plug bore.

c. Install the spark plug cap onto

the spark plug, and then place
the spark plug on the cylinder
head so that the electrodes are
grounded. (This will limit spark­ing during the next step.)

d. Turn the engine over several

times with the starter. (This will
coat the cylinder wall with oil.)

e. Remove the spark plug cap

from the spark plug, and then
install the spark plug and the
spark plug cap.

7-3

EWA10950

WARNING

To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turning
the engine over.

5. Lubricate all control cables and the
pivoting points of all levers and
pedals.

6. Check and, if necessary, correct
the tire air pressure, and then lift
the motorcycle so that both of its
wheels are off the ground. Alterna­tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.

7. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.

NOTE:

Make any necessary repairs before
storing the motorcycle.

SPECIFICATIONS

Dimensions:

Overall length:

YZ85 1818 mm (71.6 in)
(AUT)(BEL)(CHE)(DEU)(DNK)(ESP)(FIN)(
FRA)(GBR)(GRC)(IRL)(NLD)(NOR)(PRT)(
SWE)
YZ85 1821 mm (71.7 in) (ZAF)
YZ85LW 1903 mm (74.9 in)
YZ85LWW 1903 mm (74.9 in)
YZ85W 1818 mm (71.6 in)
YZ85W1 1818 mm (71.6 in)

Overall width:

758 mm (29.8 in)

Overall height:

YZ85 1161 mm (45.7 in)
YZ85LW 1205 mm (47.4 in)
YZ85LWW 1205 mm (47.4 in)
YZ85W 1161 mm (45.7 in)
YZ85W1 1161 mm (45.7 in)

Seat height:

YZ85 864 mm (34.0 in)
YZ85LW 904 mm (35.6 in)
YZ85LWW 904 mm (35.6 in)
YZ85W 864 mm (34.0 in)
YZ85W1 864 mm (34.0 in)

Wheelbase:

YZ85 1255 mm (49.4 in)
(AUT)(BEL)(CHE)(DEU)(DNK)(ESP)(FIN)(
FRA)(GBR)(GRC)(IRL)(NLD)(NOR)(PRT)(
SWE)
YZ85 1258 mm (49.5 in) (ZAF)
YZ85LW 1286 mm (50.6 in)

YZ85LWW 1286 mm (50.6 in)
YZ85W 1255 mm (49.4 in)
YZ85W1 1255 mm (49.4 in)

Ground clearance:

YZ85 351 mm (13.82 in)
YZ85LW 393 mm (15.47 in)
YZ85LWW 393 mm (15.47 in)
YZ85W 351 mm (13.82 in)
YZ85W1 351 mm (13.82 in)

Weight:

With oil and fuel:

YZ85 71.0 kg (157 lb)
YZ85LW 73.9 kg (163 lb)
YZ85LWW 73.9 kg (163 lb)
YZ85W 71.0 kg (157 lb)
YZ85W1 71.0 kg (157 lb)

Engine:

Engine type:

Liquid cooled 2-stroke

Cylinder arrangement:

Forward-inclined single cylinder

Displacement:

84.7 cm³ (5.17 cu.in)

Bore × stroke:

47.5 × 47.8 mm (1.87 × 1.88 in)

Compression ratio:

8.20 :1

Starting system:

Kickstarter

Lubrication system:

Premix

Engine oil:

Type:

YAMALUBE 2-R

Transmission oil:

Type:

YAMALUBE 4 (10W30) or SAE10W30 type
SE motor oil

Oil change quantity:

0.50 L (0.53 US qt) (0.44 Imp.qt)

Cooling system:

Radiator capacity (including all routes):

0.54 L (0.57 US qt) (0.48 Imp.qt)

Air filter:

Air filter element:

Wet element

Fuel:

Recommended fuel:

Premium unleaded gasoline only

Fuel tank capacity:

5.0 L (1.32 US gal) (1.10 Imp.gal)

Carburetor:

Manufacturer:

KEIHIN

Type × quantity:

PWK28 x 1

Spark plug (s):

Manufacturer/model:

NGK/BR10EG

Spark plug gap:

0.5–0.6 mm (0.020–0.024 in)

Clutch:

Clutch type:

Wet, multiple-disc

Transmission:

Primary reduction system:

Spur gear

8

8-1

SPECIFICATIONS

8

Primary reduction ratio:

65/18 (3.611)

Secondary reduction system:

Chain drive

Secondary reduction ratio:

YZ85 47/14 (3.357) (ZAF)
YZ85 48/14 (3.428)
(AUT)(BEL)(CHE)(DEU)(DNK)(ESP)(FIN)(
FRA)(GBR)(GRC)(IRL)(NLD)(NOR)(PRT)(
SWE)
YZ85LW 52/14 (3.714)
YZ85LWW 52/14 (3.714)
YZ85W 47/14 (3.357)
YZ85W1 48/14 (3.428)

Transmission type:

Constant mesh 6-speed

Operation:

Left foot operation

Gear ratio:

1st:

27/11 (2.454)

2nd:

32/17 (1.882)

3rd:

26/17 (1.529)

4th:

22/17 (1.294)

5th:

26/23 (1.130)

6th:

25/25 (1.000)

Chassis:

Frame type:

Semi double cradle

Caster angle:

YZ85 26.30 °
YZ85LW 26.90 °
YZ85LWW 26.90 °
YZ85W 26.30 °
YZ85W1 26.30 °

Trail:

YZ85 88.0 mm (3.46 in)
YZ85LW 105.5 mm (4.15 in)
YZ85LWW 105.5 mm (4.15 in)
YZ85W 88.0 mm (3.46 in)
YZ85W1 88.0 mm (3.46 in)

Front tire:

Type:

With tube

Size:

YZ85 70/100-17 40M
YZ85LW 70/100-19 42M
YZ85LWW 70/100-19 42M
YZ85W 70/100-17 40M
YZ85W1 70/100-17 40M

Manufacturer/model:

YZ85 DUNLOP/D739FA (ZAF)
YZ85 DUNLOP/D756F
(AUT)(BEL)(CHE)(DEU)(DNK)(ESP)(FIN)(
FRA)(GBR)(GRC)(IRL)(NLD)(NOR)(PRT)(
SWE)
YZ85LW DUNLOP/D756F
YZ85LWW DUNLOP/D756F
YZ85W DUNLOP/D756F
YZ85W1 DUNLOP/D756F

Rear tire:

Type:

With tube

Size:

YZ85 90/100-14 49M
YZ85LW 90/100-16 52M
YZ85LWW 90/100-16 52M
YZ85W 90/100-14 49M
YZ85W1 90/100-14 49M

Manufacturer/model:

DUNLOP/D756

Tire air pressure (measured on cold
tires):

Front:

100 kPa (15 psi) (1.00 kgf/cm²)

Rear:

100 kPa (15 psi) (1.00 kgf/cm²)

Front wheel:

Wheel type:

Spoke wheel

Rim size:

YZ85 17x1.40
YZ85LW 19x1.40
YZ85LWW 19x1.40
YZ85W 17x1.40
YZ85W1 17x1.40

Rear wheel:

Wheel type:

Spoke wheel

Rim size:

YZ85 14x1.60
YZ85LW 16x1.85
YZ85LWW 16x1.85
YZ85W 14x1.60
YZ85W1 14x1.60

8-2

SPECIFICATIONS

Front brake:

Type:

Single disc brake

Operation:

Right hand operation

Recommended fluid:

DOT 4

Rear brake:

Type:

Single disc brake

Operation:

Right foot operation

Recommended fluid:

DOT 4

Front suspension:

Type:

Telescopic fork

Spring/shock absorber type:

Coil spring/oil damper

Wheel travel:

275.0 mm (10.83 in)

Rear suspension:

Type:

Swingarm (link suspension)

Spring/shock absorber type:

Coil spring/gas-oil damper

Wheel travel:

YZ85 282.0 mm (11.10 in)
YZ85LW 287.0 mm (11.30 in)
YZ85LWW 287.0 mm (11.30 in)
YZ85W 282.0 mm (11.10 in)
YZ85W1 282.0 mm (11.10 in)

Electrical system:

Ignition system:

CDI

8

8-3

CONSUMER INFORMATION

Identification numbers

Record the vehicle identification num­ber and model label information in the
spaces provided below for assistance
when ordering spare parts from a
Yamaha dealer or for reference in case
the vehicle is stolen.
VEHICLE IDENTIFICATION
NUMBER:

MODEL LABEL INFORMATION:

9

EAU40790

Vehicle identification number

1. Vehicle identification number 1. Model label

The vehicle identification number is
stamped into the steering head pipe.
Record this number in the space pro­vided.

NOTE:

EAU26400

Model label

The model label is affixed to the loca­tion shown. Record the information on
this label in the space provided. This in­formation will be needed when ordering
spare parts from a Yamaha dealer.

The vehicle identification number is
used to identify your motorcycle and
may be used to register your motor­cycle with the licensing authority in your
area.

EAU26460

9-1

INDEX

A

Accessories and replacement parts ..... 6-17

Air filter element, cleaning .................... 6-12

B

Brake and clutch levers, checking

and lubricating .................................... 6-23

Brake and shift pedals, checking

and lubricating .................................... 6-23

Brake fluid, changing ............................ 6-20

Brake fluid level, checking .................... 6-19

Brake lever ............................................. 3-2

Brake pedal ............................................ 3-2

C

Cables, checking and lubricating.......... 6-22

Carburetor, adjusting ............................ 6-14

Care........................................................ 7-1

Clutch lever............................................. 3-1

Clutch lever free play, adjusting ........... 6-17

Coolant ................................................. 6-10

D

Drive chain, cleaning and lubricating .... 6-21

Drive chain slack .................................. 6-20

E

Engine break-in ...................................... 5-3

Engine, starting a warm.......................... 5-1

Engine stop button.................................. 3-1

F

Front and rear brake pads, checking .... 6-18

Front fork, adjusting................................ 3-7

Front fork, bleeding................................. 3-8

Front fork, checking .............................. 6-24

Fuel......................................................... 3-3

Fuel cock ................................................ 3-5

Fuel tank breather hose.......................... 3-5

Fuel tank cap...........................................3-3

H

Handlebar switch.....................................3-1

I

Identification numbers .............................9-1

K

Kickstarter ...............................................3-6

L

Labels, location of ...................................1-4

M

Model label..............................................9-1

P

Parking....................................................5-4

Part locations ..........................................2-1

Periodic maintenance and lubrication

chart......................................................6-2

Pre-operation check list...........................4-2

R

Rear suspension, lubricating .................6-24

S

Safety information ...................................1-1

Seat.........................................................3-6

Shifting ....................................................5-2

Shift pedal ...............................................3-1

Shock absorber assembly, adjusting ......3-9

Sidestand ..............................................3-12

Spark plug, checking...............................6-8

Specifications..........................................8-1

Starter (choke) knob................................3-6

Starting and warming up a cold

engine ...................................................5-1

Steering, checking.................................6-25

Storage....................................................7-3

Supporting the motorcycle ....................6-26

Swingarm pivots, lubricating ................. 6-24

T

Throttle cable free play, adjusting......... 6-14

Throttle grip and cable, checking

and lubricating .................................... 6-22

Tires...................................................... 6-15

Transmission oil......................................6-9

Troubleshooting .................................... 6-29

Troubleshooting charts ......................... 6-30

V

Vehicle identification number.................. 9-1

W

Wheel bearings, checking..................... 6-26

Wheel (front) ......................................... 6-27

Wheel (rear).......................................... 6-27

Wheels.................................................. 6-17

YAMAHA MOTOR CO., LTD.

PRINTED ON RECYCLED PAPER PRINTED IN JAPAN

2006.04-1.4×1 CR

(E)