Yamaha TTR250 User Manual
OWNER’S MANUAL
TTR250R(C)
LIT-11626-16-24
5GF-28199-14
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INTRODUCTION
Congratulations on your purchase of the Yamaha TTR250R. 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 machine. If you have any questions concerning the operation or maintenance of your machine,
please consult a Yamaha dealer.
IMPORTANT MANUAL INFORMATION
Particularly important information is distinguished in this manual by the following notations:
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NOTE:
NOTE:
The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY
IS INVOLVED!
Failure to follow WARNING instructions could result in severe injury or death
to the machine operator, a bystander or a person inspecting or repairing the
machine.
A CAUTION indicates special precautions that must be taken to avoid damage
to the machine.
A NOTE provides key information to make procedures easier or clearer.
8 This manual should be considered a permanent part of this machine and should remain with
it even if the machine is subsequently sold.
8 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 machine and this manual. If you have any questions concerning this manual, please consult your Yamaha dealer.
IMPORTANT MANUAL INFORMATION
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PLEASE READ THIS MANUAL AND THE “YOU AND YOUR MOTORCYCLE: RIDING TIPS”
BOOKLET CAREFULLY AND COMPLETELY BEFORE OPERATING THIS MACHINE. DO
NOT ATTEMPT TO OPERATE THIS MACHINE UNTIL YOU HAVE ATTAINED ADEQUATE
KNOWLEDGE OF ITS CONTROLS AND OPERATING FEATURES AND UNTIL YOU HAVE
BEEN TRAINED IN SAFE AND PROPER RIDING TECHNIQUES. REGULAR INSPECTIONS
AND CAREFUL MAINTENANCE, ALONG WITH GOOD RIDING SKILLS, WILL ENSURE THAT
YOU SAFELY ENJOY THE CAPABILITIES AND THE RELIABILITY OF THIS MACHINE.
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THIS MACHINE IS DESIGNED AND MANUFACTURED FOR OFF-ROAD USE ONLY. IT IS
ILLEGAL TO OPERATE THIS MACHINE ON ANY PUBLIC STREET, ROAD OR HIGHWAY.
SUCH USE IS PROHIBITED BY LAW. THIS MACHINE 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 MACHINE.
AFFIX DEALER
LABEL HERE
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TTR250R
OWNER’S MANUAL
©2002 by Yamaha Motor Corporation, U.S.A.
1st edition, April 2002
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation, U.S.A.
is expressly prohibited.
Printed in Japan.
P/N LIT-11626-16-24
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TABLE OF CONTENTS
SAFETY INFORMATION ...................................1-1
1
Safe riding .......................................................1-1
Protective apparel ...........................................1-2
Modifications ...................................................1-3
Loading and accessories ................................1-3
Gasoline and exhaust gas ...............................1-5
Location of important labels ............................1-7
DESCRIPTION ...................................................2-1
2
Left view ..........................................................2-1
Right view ........................................................2-2
Controls and instruments ................................2-3
INSTRUMENT AND CONTROL
3
FUNCTIONS ......................................................3-1
Main switch .....................................................3-1
Tripmeter .........................................................3-1
Handlebar switches .........................................3-1
Clutch lever .....................................................3-2
Shift pedal .......................................................3-2
Brake lever ......................................................3-3
Brake pedal .....................................................3-3
Fuel tank cap ...................................................3-3
Fuel .................................................................3-4
Fuel tank breather hose ..................................3-5
Fuel cock .........................................................3-5
Starter (choke) knob ........................................3-6
Seat .................................................................3-7
Adjusting the front fork ....................................3-7
Adjusting the shock absorber assembly ........3-10
Starting circuit cut-off system ........................3-12
PRE-OPERATION CHECKS .............................4-1
4
Pre-operation check list ...................................4-1
OPERATION AND IMPORTANT RIDING
5
POINTS ..............................................................5-1
Starting and warming up a cold engine ...........5-1
Starting a warm engine ...................................5-3
Shifting ............................................................5-3
Engine break-in ...............................................5-4
Parking ............................................................5-5
PERIODIC MAINTENANCE AND MINOR
6
REPAIR ..............................................................6-1
Owner’s tool kit ................................................6-1
Periodic maintenance and lubrication chart ....6-2
Removing and installing the cowling and
panels ..........................................................6-5
Checking the spark plug ..................................6-6
TABLE OF CONTENTS
Engine oil and oil filter element .......................6-8
Cleaning the air filter element .......................6-12
Cleaning the spark arrester ...........................6-13
Adjusting the carburetor ................................6-14
Adjusting the throttle cable free play .............6-14
Adjusting the valve clearance .......................6-15
Tires ..............................................................6-15
Spoke wheels ................................................6-17
Accessories and replacement parts ..............6-18
Adjusting the clutch lever free play ...............6-19
Adjusting the brake lever free play ................6-19
Adjusting the brake pedal position ................6-20
Checking the front and rear brake pads ........6-21
Checking the brake fluid level .......................6-21
Changing the brake fluid ...............................6-22
Drive chain slack ...........................................6-23
Lubricating the drive chain ............................6-24
Checking and lubricating the cables .............6-25
Checking and lubricating the throttle grip
and cable ...................................................6-26
Checking and lubricating the brake and
shift pedals .................................................6-26
Checking and lubricating the brake and
clutch levers ...............................................6-26
Checking and lubricating the sidestand ........6-27
Checking the front fork ..................................6-27
Checking the steering ...................................6-28
Checking the wheel bearings ........................6-28
Battery ...........................................................6-29
Replacing the fuse .......................................6-30
Replacing the headlight bulb .........................6-31
Replacing the taillight bulb ............................6-33
Supporting the machine ................................6-33
Front wheel ...................................................6-34
Rear wheel ....................................................6-36
Troubleshooting ............................................6-38
Troubleshooting chart ...................................6-39
MACHINE CARE AND STORAGE ....................7-1
7
Care ................................................................7-1
Storage ............................................................7-4
SPECIFICATIONS .............................................8-1
8
Specifications ..................................................8-1
CONSUMER INFORMATION ............................9-1
9
Identification numbers .....................................9-1
Key identification number ................................9-1
Vehicle identification number ..........................9-1
Model label ......................................................9-2
Motorcycle noise regulation ............................9-3
Maintenance record ........................................9-5
Off-road motorcycle limited warranty ..............9-7
Yamaha extended service (Y.E.S.) .................9-9
TABLE OF CONTENTS
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SAFETY INFORMATION
MACHINES ARE SINGLE TRACK VEHICLES. THEIR SAFE USE AND OPERATION ARE DEPENDENT UPON THE USE OF PROPER RIDING TECHNIQUES AS WELL AS THE EXPERTISE OF
1
THE OPERATOR. EVERY OPERATOR SHOULD KNOW THE FOLLOWING REQUIREMENTS
BEFORE RIDING THIS MACHINE.
HE OR SHE SHOULD:
1. OBTAIN THOROUGH INSTRUCTIONS FROM A COMPETENT SOURCE ON ALL ASPECTS
OF MACHINE OPERATION.
2. OBSERVE THE WARNINGS AND MAINTENANCE REQUIREMENTS IN THE OWNER’S MANUAL.
3. OBTAIN QUALIFIED TRAINING IN SAFE AND PROPER RIDING TECHNIQUES.
4. OBTAIN PROFESSIONAL TECHNICAL SERVICE AS INDICATED BY THE OWNER’S MANUAL
AND/OR WHEN MADE NECESSARY BY MECHANICAL CONDITIONS.
Safe riding
1. Always make pre-operation checks. Careful checks may help prevent an accident.
2. This machine is designed for off-road use only, therefore, it is illegal to operate it on public
streets, roads, or highways. Off-road use on public lands may be illegal. Please check local regulations before riding.
3. This machine is designed to carry the operator only. No passengers.
4. Many accidents involve inexperienced operators.
a. Make sure that you are qualified and that you only lend your machine to other qualified opera-
tors.
b. Know your skills and limits. Staying within your limits may help you to avoid an accident.
5. Many accidents have been caused by error of the machine operator. A typical error made by the
operator is veering wide on a turn due to EXCESSIVE SPEED or undercornering (insufficient
lean angle for the speed). Never travel faster than warranted by conditions.
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Q
SAFETY INFORMATION
6. Ride cautiously in unfamiliar areas. You may encounter hidden obstacles that could cause an
accident.
7. The posture of the operator is important 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 machine.
8. Never ride under the influence of alcohol or other drugs.
Protective apparel
The majority of fatalities from machine 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.
1. Always wear an approved helmet.
2. Wear a face shield or goggles. Wind in your unprotected eyes could contribute to an impairment
of vision that could delay seeing a hazard.
3. The use of a jacket, heavy boots, trousers, gloves, etc., is effective in preventing or reducing
abrasions or lacerations.
4. Never wear loose-fitting clothes, otherwise they could catch on the control levers, footrests, or
wheels and cause injury or an accident.
5. 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.
1
1-2
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SAFETY INFORMATION
Modifications
Modifications made to this machine not approved by Yamaha, or the removal of original equipment,
1
may render the machine unsafe for use and may cause severe personal injury. Modifications may
also make your machine illegal to use.
Loading and accessories
Adding accessories or cargo to your machine can adversely affect stability and handling if the weight
distribution of the machine is changed. To avoid the possibility of an accident, use extreme caution
when adding cargo or accessories to your machine. Use extra care when riding a machine that has
added cargo or accessories. Here are some general guidelines to follow if loading cargo or adding
accessories to your machine:
Loading
The total weight of the operator, accessories and cargo must not exceed the maximum load limit of
90 kg (198 lb). When loading within this weight limit, keep the following in mind:
1. Cargo and accessory weight should be kept as low and close to the machine as possible. Make
sure to distribute the weight as evenly as possible on both sides of the machine to minimize
imbalance or instability.
2. Shifting weights can create a sudden imbalance. Make sure that accessories and cargo are
securely attached to the machine before riding. Check accessory mounts and cargo restraints
frequently.
3. Never attach any large or heavy items to the handlebar, front fork, or front fender. These items,
including such cargo as sleeping bags, duffel bags, or tents, can create unstable handling or a
slow steering response.
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SAFETY INFORMATION
Accessories
Genuine Yamaha accessories have been specifically designed for use on this machine. 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”.
1. Never install accessories or carry cargo that would impair the performance of your machine.
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, or obscure lights or reflectors.
a. 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 front
fork area, they must be as lightweight as possible and should be kept to a minimum.
b. Bulky or large accessories may seriously affect the stability of the machine due to aerodynamic
effects. Wind may attempt to lift the machine, or the machine may become unstable in cross
winds.
c. 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.
2. Use caution when adding electrical accessories. If electrical accessories exceed the capacity of
the machine’s electrical system an electric failure could result, which could cause a dangerous
loss of lights or engine power.
1
1-4
Q
SAFETY INFORMATION
Gasoline and exhaust gas
1. GASOLINE IS HIGHLY FLAMMABLE:
1
a. Always turn the engine off when refueling.
b. Take care not to spill any gasoline on the engine or exhaust pipe(s)/muffler(s) when refueling.
c. Never refuel while smoking or in the vicinity of an open flame.
2. 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 machine in an area that has adequate ventilation.
3. Always turn the engine off before leaving the machine unattended and remove the key from the
main switch. When parking the machine, note the following:
a. The engine and exhaust pipe(s)/muffler(s) may be hot, therefore, park the machine in a place
where pedestrians or children are not likely to touch these hot areas.
b. Do not park the machine on a slope or soft ground, otherwise it may fall over.
c. Do not park the machine near a flammable source (e.g., a kerosene heater, or near an open
flame), otherwise it could catch fire.
4. When transporting the machine in another vehicle, make sure that it is kept upright and that the
fuel cock(s) are turned to “ON” or “RES” (for vacuum type)/”OFF” (for manual type). If the
machine should lean over, gasoline may leak out of the carburetor or fuel tank.
5. If you should swallow any gasoline, 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.
1-5
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SAFETY INFORMATION
1
1-6
Q
1
2
3
4
SAFETY INFORMATION
Location of important labels
Please read the following important labels carefully before operating this machine.
1
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1-7
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Riding 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-A0
WARNING
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WARNING
q
8
8
This unit contains high pressure nitrogen gas.
Mishandling can cause explosion.
Read owner's manual for instructions.
Do not incinerate, puncture or open.
YAMAHA
4AA-22259-80
WARNING
q
THE OWNER'S MANUAL AND ALL LABELS.
NEVER CARRY A PASSENGER. You increase
you operate this vehicle on a public road.
EXPERIENCED RIDER ONLY.
8
8
8
8
8
5PA-2118K-00
ALWAYS WEAR AN APPROVED MOTORCYCLE
HELMET,eye protection, and protective clothing.
ROADS. You can collide with another vehicle if
NEVER OPERATE THIS VEHICLE ON PUBLIC
your risk of losing control if you carry a passenger.
BEFORE YOU OPERATE THIS VEHICLE, READ
TIRE INFORMATION
follows.
FRONT :
:REAR
3RV-21668-A0
Cold tire normal pressure should be set as
100 kPa,{1.00 kgf/cm2}, 15 psi
100 kPa,{1.00 kgf/cm2}, 15 psi
SAFETY INFORMATION
1
2
3
1
4
1-8
DESCRIPTION
1345
6
78
2
Left view
2
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1. Headlight (page 6-31)
2. Front fork air valve (page 3-7)
3. Fuel cock (page 3-5)
4. Starter (choke) knob (page 3-6)
5. Air filter element (page 6-12)
6. Shock absorber rebound
damping adjusting dial (page 3-11)
7. Shift pedal (page 3-2)
8. Front fork damping adjusting
screw (page 3-9)
2-1
910111213
1415
16
Right view
DESCRIPTION
2
9. Spark arrester (page 6-13)
10. Battery (page 6-29)
11. Fuse (page 6-30)
12. Shock absorber compression
damping adjusting knob (page 3-11)
13. Main switch (page 3-1)
14. Engine oil filter element (page 6-9)
15. Brake pedal (page 3-3, 6-20)
16. Shock absorber spring preload
adjusting nut (page 3-10)
2-2
DESCRIPTION
1
2
34
5
6
7
Controls and instruments
2
1. Clutch lever (page 3-2, 6-19)
2. Left handlebar switch (page 3-1)
3. Tripmeter (page 3-1)
4. Right handlebar switches (page 3-2)
5. Brake lever (page 3-3, 6-19)
6. Throttle grip (page 6-14)
7. Fuel tank cap (page 3-3)
2-3
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OFF
ON
1
1
2
INSTRUMENT AND CONTROL FUNCTIONS
3
Main switch
The main switch controls the ignition
and lighting systems. The various
main switch positions are described
below.
ON
All electrical systems are supplied
with power, and the engine can be
started. The key cannot be removed.
OFF
All electrical systems are off. The key
can be removed.
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1. Tripmeter
2. Reset knob
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Tripmeter
The tripmeter shows the distance
traveled since it was last set to zero
with the reset knob. The tripmeter
can be used to estimate the distance
that can be traveled with a full tank of
fuel. This information will enable you
to plan future fuel stops.
3-1
1. Light switch “:”
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Handlebar switches
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Light switch “:”
Set this switch to “:” to turn on the
headlight and the taillight.
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Always turn the key to “OFF” and
light switch to “OFF” when the
engine is not running, otherwise
the headlight will stay on and the
battery may discharge due to
extended use.
INSTRUMENT AND CONTROL FUNCTIONS
1
2
1
1
3
1. Engine stop switch “#/$”
2. Start switch “START”
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Engine stop switch “#/$”
Set this switch to “#” before starting
the engine. Set this switch to “$” to
stop the engine in case of an emergency, such as when the machine
overturns or when the throttle cable is
stuck.
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Start switch “START”
Push this switch to crank the engine
with the starter.
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See page 5-1 for starting instructions prior to starting the engine.
1. Clutch lever
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Clutch lever
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.
The clutch lever is equipped with a
clutch switch, which is part of the ignition circuit cut-off system. (See page
3-12 for an explanation of the ignition
circuit cut-off system.)
3-2
1. Shift pedal
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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 machine.
INSTRUMENT AND CONTROL FUNCTIONS
1
1
a
1
3
1. Brake lever
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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 pedal
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Brake pedal
The brake pedal is on the right side
of the machine. To apply the rear
brake, press down on the brake
pedal.
3-3
1. Fuel tank cap
a. Remove.
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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.
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Make sure that the fuel tank cap is
properly closed before riding.
INSTRUMENT AND CONTROL FUNCTIONS
1
2
3
1. Filler tube
2. Fuel level
Fuel
Make sure that there is sufficient fuel
in the tank. Fill the fuel tank to the
bottom of the filler tube as shown.
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8 Do not overfill the fuel tank,
otherwise it may overflow
when the fuel warms up and
expands.
8 Avoid spilling fuel on the hot
engine.
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Immediately wipe off spilled fuel
with a clean, dry, soft cloth, since
fuel may deteriorate painted surfaces or plastic parts.
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Recommended fuel:
UNLEADED GASOLINE
ONLY
Fuel tank capacity:
Total amount:
10.0 L
(2.2 lmp gal, 2.64 US gal)
Reserve amount:
2.0 L
(0.44 lmp gal, 0.53 US gal)
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Use only unleaded gasoline. The
use of leaded gasoline will cause
severe damage to internal engine
parts, such as the valves and piston rings, as well as to the exhaust
system.
3-4
INSTRUMENT AND CONTROL FUNCTIONS
RES
ON
FUEL
OFF
1
1
Your Yamaha engine has been
designed to use regular unleaded
gasoline with a pump octane number
[(R+M)/2] of 86 or higher, or a
research octane number of 91 or
higher. If knocking (or pinging)
occurs, use a gasoline of a different
brand or premium unleaded fuel. Use
of unleaded fuel will extend spark
plug life and reduce maintenance
costs.
Gasohol
There are two types of gasohol:
gasohol containing ethanol and that
containing methanol. Gasohol containing ethanol can be used if the
ethanol content does not exceed
10%. Gasohol containing methanol is
not recommended by Yamaha
because it can cause damage to the
fuel system or vehicle performance
problems.
1. Fuel tank breather hose
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Fuel tank breather hose
Before operating the machine:
8 Check the fuel tank breather
hose connection.
8 Check the fuel tank breather
hose for cracks or damage, and
replace it if damaged.
8 Make sure that the end of the
fuel tank breather hose is not
blocked, and clean it if necessary.
OFF: closed position
3
1. Arrow mark positioned over “OFF”
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Fuel cock
The fuel cock supplies fuel from the
tank to the carburetor while filtering it
also.
The fuel cock has three positions:
OFF
With the lever in this position, fuel will
not flow. Always return the lever to
this position when the engine is not
running.
3-5
INSTRUMENT AND CONTROL FUNCTIONS
ON
FUEL
RES
OFF
1
ON
OFF
ON
FUEL
RES
1
RES
1
a
b
ON: normal position RES: reserve position
3
1. Arrow mark positioned over “ON”
ON
With the lever in this position, fuel
flows to the carburetor. Normal riding
is done with the lever in this position.
1. Arrow mark positioned over “RES”
RES
This indicates reserve. If you run out
of fuel while riding, move the lever to
this position. Fill the tank at the first
opportunity. Be sure to set the lever
back to “ON” after refueling!
3-6
1. Starter (choke) knob “1”
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Starter (choke) knob “1”
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).
1
1. Bolt (×2)
1
2
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Seat
To remove the seat
Remove the bolts, and then pull the
seat off.
INSTRUMENT AND CONTROL FUNCTIONS
Adjusting the front fork
The front fork is equipped with air
valves for adjusting the spring rate
and screws for adjusting the damping
force.
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There should be no difference in
1. Projection (×2)
2. Seat holder (×2)
To install the seat
1. Insert the projections on the front
of the seat into the seat holders
as shown.
2. Place the seat in the original
position, and then tighten the
bolts.
NOTE:
Make sure that the seat is properly
secured before riding.
air pressure between the fork legs.
Spring rate
The total spring rate is adjusted by
changing the air pressure as follows.
1. Lift the front wheel off the ground
according to the procedure on
page 6-33.
NOTE:
When checking and adjusting the air
pressure, there should be no weight
on the front end of the machine.
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3
3-7
INSTRUMENT AND CONTROL FUNCTIONS
1
2
3
1. Air valve cap
2. Air valve
2. Remove the air valve cap from
each fork leg.
3. Check the air pressure in each
fork leg with an air pressure
gauge.
NOTE:
An optional air pressure gauge is
available at a Yamaha dealer.
4. To increase the spring rate and
thereby harden the suspension,
increase the air pressure with an
air pump. To decrease the spring
rate and thereby soften the suspension, decrease the air pressure by pushing each valve stem
down.
Spring rate:
Minimum (soft):
Air pressure = 0 kPa
(0 kgf/cm2, 0 psi)
Standard:
Air pressure = 0 kPa
(0 kgf/cm2, 0 psi)
Maximum (hard):
Air pressure = 40 kPa
(0.4 kgf/cm2, 5.8 psi)
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Never exceed the maximum air
pressure, otherwise the front fork
oil seals may become damaged.
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Always adjust both fork legs
equally, otherwise poor handling
and loss of stability may result.
5. Securely install the air valve
caps.
3-8
1
1. Rubber cap
1
a
b
Minimum (soft) 20 clicks in direction b*
Standard 11 clicks in direction b*
Maximum (hard) 1 click in direction b*
* With the adjusting screw fully turned in direction a
Damping force
1. Remove the rubber cap from
each fork leg.
INSTRUMENT AND CONTROL FUNCTIONS
cC
Never attempt to turn an adjusting
mechanism beyond the maximum
or minimum settings.
3. Securely install the rubber caps.
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1. Damping force adjusting screw
2. To increase the damping force
and thereby harden the damping,
turn the adjusting screw on each
fork leg in direction a. To
decrease the damping force and
thereby soften the damping, turn
the adjusting screw on each fork
leg in direction b.
3-9
Be sure to install the rubber caps
to prevent dust, etc. from entering
the fork legs.
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.
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3
INSTRUMENT AND CONTROL FUNCTIONS
12
A
b
a
Adjusting the shock
absorber assembly
This shock absorber assembly is
equipped with a spring preload
adjusting nut, a rebound damping
force adjusting dial and a compression damping force adjusting knob.
3
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Never attempt to turn an adjusting
mechanism beyond the maximum
or minimum settings.
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EC000015
1. Locknut
2. Adjusting nut
Spring preload
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:
8 A special wrench is needed to
make this adjustment and it can
be obtained at a Yamaha dealer.
8 The spring preload setting is
determined by measuring distance A, shown in the illustration.
The shorter the distance A is, the
higher the spring preload; the
longer distance A is, the lower
the spring preload.
Spring preload:
Minimum (soft):
Distance A = 236 mm (9.3 in)
Standard:
Distance A = 228 mm (9.0 in)
Maximum (hard):
Distance A = 224 mm (8.8 in)
3. Tighten the locknut to the specified torque.
3-10
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