Yamaha XV125S User Manual
OWNER’S MANUAL
XV125S
5AJ-28199-E3
Welcome to the Yamaha world of motorcycling!
INTRODUCTION
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As the owner of a XV125S, you are benefiting from Yamaha’s vast experience in and newest
technology for the design and the manufacture of high-quality products, which have earned
Yamaha a reputation for dependability.
Please take the time to read this manual thoroughly, so as to enjoy all your XV125S’s advantages. The owner’s manual does not only instruct you in how to operate, inspect and maintain
your motorcycle, but also in how to safeguard yourself and others from trouble and injury.
In addition, the many tips given in this manual will help to keep your motorcycle in the best
possible condition. If you have any further questions, do not hesitate to contact your Yamaha
dealer.
The Yamaha team wishes you many safe and pleasant rides. So, remember to put safety first!
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IMPORTANT MANUAL INFORMATION
Particularly important information is distinguished in this manual by the following notations:
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NOTE:
NOTE:
8 This manual should be considered a permanent part of this motorcycle and should
8 Yamaha continually seeks advancements in product design and quality. Therefore,
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
motorcycle operator, a bystander or a person inspecting or repairing the motorcycle.
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.
remain with it even if the motorcycle is subsequently sold.
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 there is any question concerning this manual, please consult your Yamaha dealer.
IMPORTANT MANUAL INFORMATION
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PLEASE READ THIS MANUAL CAREFULLY AND COMPLETELY BEFORE OPERATING THIS
MOTORCYCLE.
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XV125S
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OWNER’S MANUAL
©1999 by Yamaha Motor Co., Ltd.
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1st Edition, June 1999
All rights reserved. Any reprinting or
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unauthorized use without the written
permission of Yamaha Motor Co., Ltd.
is expressly prohibited.
Printed in Japan.
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TABLE OF CONTENTS
GIVE SAFETY THE RIGHT OF WAY ..................1-1
1
DESCRIPTION .....................................................2-1
2
Left view............................................................2-1
Right view.........................................................2-2
Controls/Instruments .......................................2-3
INSTRUMENT AND CONTROL
3
FUNCTIONS........................................................3-1
Main switch ......................................................3-1
Indicator lights..................................................3-1
Speedometer....................................................3-2
Handlebar switches..........................................3-2
Clutch lever.......................................................3-4
Shift pedal.........................................................3-4
Front brake lever ..............................................3-4
Rear brake pedal ..............................................3-5
Fuel tank cap.....................................................3-5
Fuel....................................................................3-6
Fuel cock ...........................................................3-7
Starter (choke) “1”.........................................3-8
Steering lock.....................................................3-8
Seat ...................................................................3-9
Helmet holder...................................................3-9
Rear shock absorber adjustment..................3-10
Sidestand........................................................3-10
Sidestand/clutch switch operation check.....3-11
PRE-OPERATION CHECKS.................................4-1
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Pre-operation check list ...................................4-1
OPERATION AND IMPORTANT RIDING
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POINTS................................................................5-1
Starting the engine ..........................................5-1
Starting a warm engine...................................5-3
Shifting..............................................................5-4
Recommended shift point
(for Switzerland only) ......................................5-4
Tips for reducing fuel consumption ...............5-5
Engine break-in ................................................5-5
Parking ..............................................................5-6
PERIODIC MAINTENANCE AND MINOR
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REPAIR ................................................................6-1
Tool kit ..............................................................6-1
Periodic maintenance and lubrication............6-3
Panel removal and installation .......................6-6
Panel A..............................................................6-6
Panel B ..............................................................6-7
Spark plugs.......................................................6-8
Engine oil..........................................................6-9
Air filter ...........................................................6-12
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TABLE OF CONTENTS
Carburetor adjustment ..................................6-15
Idle speed adjustment ...................................6-15
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Throttle cable free play adjustment..............6-16
Valve clearance adjustment ..........................6-16
Tires.................................................................6-17
Wheels ............................................................6-19
Clutch lever free play adjustment.................6-19
Front brake lever free play adjustment ........6-20
Rear brake pedal height and free play
adjustment......................................................6-21
Brake light switch adjustment.......................6-22
Checking the front brake pads and rear brake
shoes...............................................................6-22
Inspecting the brake fluid level.....................6-23
Brake fluid replacement.................................6-24
Drive chain slack check..................................6-24
Drive chain slack adjustment ........................6-25
Drive chain lubrication...................................6-26
Cable inspection and lubrication ..................6-27
Throttle cable and grip lubrication ...............6-27
Brake and shift pedal lubrication..................6-28
Brake and clutch lever lubrication ................6-28
Sidestand lubrication.....................................6-28
Front fork inspection......................................6-29
Steering inspection........................................6-29
Wheel bearings ..............................................6-30
Battery.............................................................6-30
Fuse replacement...........................................6-32
Headlight bulb replacement..........................6-33
Turn signal light bulb replacement ..............6-34
Taillight bulb replacement ............................6-35
Supporting the motorcycle ...........................6-36
Front wheel removal......................................6-36
Front wheel installation.................................6-37
Rear wheel removal.......................................6-38
Rear wheel installation ..................................6-39
Troubleshooting.............................................6-40
Troubleshooting chart ...................................6-41
MOTORCYCLE CARE AND STORAGE ..............7-1
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Care ...................................................................7-1
Storage..............................................................7-4
SPECIFICATIONS................................................8-1
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How to use the conversion table ....................8-5
CONSUMER INFORMATION .............................9-1
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Identification number records.........................9-1
Key identification number ...............................9-1
Vehicle identification number .........................9-1
Model label.......................................................9-2
Q GIVE SAFETY THE RIGHT OF WAY
Motorcycles are fascinating vehicles, which can give you an unsurpassed feeling of power and
freedom. However, they also impose certain limits, which you must accept; even the best
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motorcycle does not ignore the laws of physics.
Regular care and maintenance are essential for preserving your motorcycle’s value and operating condition. Moreover, what is true for the motorcycle is also true for the rider: good performance depends on being in good shape. Riding under the influence of medication, drugs and
alcohol is, of course, out of the question. Motorcycle riders - more than car drivers - must
always be at their mental and physical best. Under the influence of even small amounts of
alcohol, there is a tendency to take dangerous risks.
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Protective clothing is as essential for the motorcycle rider as seat belts are for car drivers and
passengers. Always wear a complete motorcycle suit (whether made of leather or tear-resistant
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synthetic materials with protectors), sturdy boots, motorcycle gloves and a properly fitting helmet. Optimum protective wear, however, should not encourage carelessness. Though full-coverage helmets and suits, in particular, create an illusion of total safety and protection, motorcy-
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clists will always be vulnerable. Riders who lack critical self-control run the risk of going too
fast and are apt to take chances. This is even more dangerous in wet weather. The good motor-
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cyclist rides safely, predictably and defensively - avoiding all dangers, including those caused
by others.
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Enjoy your ride!
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DESCRIPTION
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Left view
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1. Headlight (page 6-33)
2. Steering lock (page 3-8)
3. Fuel cock (page 3-7)
4. Main switch (page 3-1)
5. Fuses (page 6-32)
6. Helmet holder (page 3-9)
7. Rear shock absorber spring preload
adjusting ring (page 3-10)
8. Shift pedal (page 3-4)
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Right view
DESCRIPTION
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9. Battery (page 6-30)
10. Air filter (page 6-12)
11. Rear brake pedal (page 3-5, 6-21)
12. Oil filter (page 6-9)
13. Tool kit (page 6-1)
14. Rear shock absorber spring preload
adjusting ring (page 3-10)
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DESCRIPTION
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Controls/Instruments
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15. Clutch lever (page 3-4, 6-19)
16. Left handlebar switches (page 3-2)
17. Speedometer (page 3-2)
18. Right handlebar switches (page 3-3)
19. Front brake lever (page 3-4, 6-20)
20. Throttle grip (page 6-16)
21. Fuel tank cap (page 3-5)
2-3
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ON
OFF
P
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Main switch
The main switch controls the ignition and lighting systems. Its operation is described below.
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ON
Electrical circuits are switched on.
The engine can be started. The key
cannot be removed in this position.
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OFF
All electrical circuits are switched
off. The key can be removed in this
position.
INSTRUMENT AND CONTROL FUNCTIONS
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P (Parking)
The taillight and auxiliary light
come on but all other circuits are
off. With the key at “OFF”, push it
into the main switch, turn it counterclockwise to “P”, and remove it.
To cancel the parking, turn the key
clockwise.
1. High beam indicator light “&”
2. Neutral indicator light “N”
3. Turn indicator light “5”
Indicator lights
High beam indicator light “&”
This indicator comes on when the
headlight high beam is used.
Neutral indicator light “N”
This indicator comes on when the
transmission is in neutral.
Turn indicator light “5”
This indicator flashes when the
turn switch is moved to the left or
right.
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INSTRUMENT AND CONTROL FUNCTIONS
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NOTE:
(for German model equipped with
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speed limiter only)
This motorcycle is equipped with a
speed limiter which prevents it
from exceeding a top speed of 80
km/h.
1. Odometer
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2. Trip odometer
3. Reset knob
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Speedometer
The speedometer shows riding
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speed. This speedometer is
equipped with an odometer and
trip odometer. The trip odometer
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can be reset to “0” with the reset
knob. Use the trip odometer to
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estimate how far you can ride on a
tank of fuel. This information will
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enable you to plan fuel stops in the
future.
1. Pass switch “&”
2. Dimmer switch
3. Turn signal switch
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4. Horn switch “*”
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Handlebar switches
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Pass switch “&“
Press the switch to operate the
passing light.
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Dimmer switch
Turn the switch to “&” for the
high beam and to “%” for the low
beam.
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INSTRUMENT AND CONTROL FUNCTIONS
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Turn signal switch
To signal a right-hand turn, push
the switch to “6”. To signal a lefthand turn, push the switch to
“4”. Once the switch is released
it will return to the center position.
To cancel the signal, push the
switch in after it has returned to
the center position.
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Horn switch “*”
Press the switch to sound the horn.
1. Engine stop switch
2. Lights switch
3. Start switch “$”
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Lights switch
Turning the light switch to “'”,
turns on the auxiliary light, meter
lights and taillight. Turning the
light switch to “:” turns the head-
light on also.
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Engine stop switch
The engine stop switch is a safety
device for use in an emergency
such as when the motorcycle overturns or if trouble occurs in the
throttle system. Turn the switch to
“#” to start the engine.
In case of emergency, turn the
switch to “$” to stop the engine.
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Start switch “,“
The starter motor cranks the
engine when pushing the start
switch.
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See starting instructions prior to
starting the engine.
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INSTRUMENT AND CONTROL FUNCTIONS
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N
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Clutch lever
The clutch lever is located on the
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left handlebar, and the ignition circuit cut-off system is incorporated
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in the clutch lever holder. Pull the
clutch lever to the handlebar to dis-
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engage the clutch, and release the
lever to engage the clutch. The
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lever should be pulled rapidly and
released slowly for smooth clutch
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operation. (Refer to the engine
starting procedures for a description of the ignition circuit cut-off
system.)
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N. Neutral
1. Shift pedal
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Shift pedal
This motorcycle is equipped with a
constant-mesh 5-speed transmission.
The shift pedal is located on the
left side of the engine and is used
in combination with the clutch
when shifting.
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Front brake lever
The front brake lever is located on
the right handlebar. Pull it toward
the handlebar to apply the front
brake.
INSTRUMENT AND CONTROL FUNCTIONS
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Rear brake pedal
The rear brake pedal is on the right
side of the motorcycle. Press down
on the brake pedal to apply the
rear brake.
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1. Open
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Fuel tank cap
To open
Insert the key and turn it 1/4 turn
clockwise. The lock will be released
and the cap can be opened.
To close
Push the tank cap into position
with the key inserted. To remove
the key, turn it counterclockwise to
the original position.
NOTE:
This tank cap cannot be closed
unless the key is in the lock. The
key cannot be removed if the cap is
not locked properly.
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Be sure the cap is properly
installed and locked in place
before riding the motorcycle.
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INSTRUMENT AND CONTROL FUNCTIONS
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1. Filler tube
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2. Fuel level
Fuel
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Make sure there is sufficient fuel in
the tank. Fill the fuel tank to the
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bottom of the filler tube as shown
in the illustration.
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Do not overfill the fuel tank. Avoid
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spilling fuel on the hot engine. Do
not fill the fuel tank above the bot-
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tom of the filler tube or it may
overflow when the fuel heats up
later and expands.
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Always wipe off spilled fuel immediately with a dry and clean soft
cloth. Fuel may deteriorate painted
surfaces or plastic parts.
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Recommended fuel:
Regular unleaded gasoline
with a research octane
number of 91 or higher.
Fuel tank capacity:
Total:
9.5 L
Reserve:
2.6 L
NOTE:
If knocking or pinging occurs, use a
different brand of gasoline or higher octane grade.
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INSTRUMENT AND CONTROL FUNCTIONS
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ON RES
1. Arrow mark pointing to “ON”
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Fuel cock
The negative pressure fuel cock
supplies fuel from the tank to the
carburetor while filtering it also.
The fuel cock has the following
three positions:
ON
With the lever in this position, fuel
flows if the engine is running, but
stops if the engine is not running.
1. Arrow mark pointing to “RES”
RES
This indicates reserve. If you run
out of fuel while riding, move the
lever to “PRI”, start the engine,
then move the lever to “RES”. FILL
THE TANK AT THE FIRST OPPORTUNITY. BE SURE TO MOVE THE
LEVER TO “ON” AFTER REFUELING.
NOTE:
The fuel cock operates on vacuum
from the engine when set at “ON”
or “RES”. If the line connecting the
cock to the carburetor intake mani-
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fold is not connected or has a leak,
the cock will not function properly.
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INSTRUMENT AND CONTROL FUNCTIONS
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PRI
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1. Arrow mark pointing to “PRI”
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PRI
This indicates prime. With the lever
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in this position, fuel flows whether
the engine is running or not. If the
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fuel tank is completely empty, refill
the tank and move the lever to
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“PRI” to prime the carburetor.
Move the lever to “ON” after start-
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ing the engine.
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a
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b
1. Starter (choke) “1”
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Starter (choke) “1”
Starting a cold engine requires a
richer air-fuel mixture. A separate
starter circuit supplies this mixture.
Move in direction a to turn on the
starter (choke).
Move in direction b to turn off the
starter (choke).
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1. Steering lock
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Steering lock
To lock the steering
Turn the handlebars all the way to
the right and open the steering
lock cover.
Insert the key and turn it 1/8 turn
counterclockwise. Then, push the
key in while turning the handlebars
slightly to the left and turn the key
1/8 turn clockwise.
Check that the steering is locked,
remove the key and close the lock
cover.
To unlock the steering
Insert the key, push it in and turn it
1/8 turn counterclockwise so that it
moves out. Then, release and
remove the key.
INSTRUMENT AND CONTROL FUNCTIONS
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1. Bolt (×2)
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Seat
To remove
1. Remove panels A and B. (See
page 6-6 for panel removal
and installation procedures.)
2. Remove the rider seat bolts
and lift the seat upward.
1. Projection
2. Seat holder
To install
1. Insert the projection on the
front of the rider seat into the
seat holder, then tighten the
seat bolts.
2. Install the panels.
NOTE:
Make sure that the seat is securely
fitted.
3-9
1. Helmet holder
2. Open
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Helmet holder
To open the helmet holder, insert
the key in the lock and turn it as
shown. To lock the helmet holder,
replace the holder in its original
position.
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Never ride with a helmet in the
helmet holder. The helmet may hit
objects, causing loss of control
and possibly an accident.
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INSTRUMENT AND CONTROL FUNCTIONS
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b
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1. Position indicator
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Rear shock absorber
adjustment
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Each shock absorber is equipped
with a spring preload adjusting
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ring. Adjust spring preload as follows.
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Turn the adjusting ring in direction
a to increase spring preload and
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in direction b to decrease spring
preload. Make sure that the appro-
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priate notch in the adjusting ring is
aligned with the position indicator
on the rear shock absorber.
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Stan-
Adjusting
position
Soft
dard
12345
Hard
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Always adjust each shock
absorber to the same setting.
Uneven adjustment can cause
poor handling and loss of stability.
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Sidestand
This model is equipped with an
ignition circuit cut-off system. The
motorcycle must not be ridden
when the sidestand is down. The
sidestand is located on the left side
of the frame. (Refer to page 5-1 for
an explanation of this system.)
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INSTRUMENT AND CONTROL FUNCTIONS
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This motorcycle must not be operated with the sidestand in the
down position. If the stand is not
properly retracted, it could contact
the ground and distract the operator, resulting in a possible loss of
control. Yamaha has designed into
this motorcycle a lockout system
to assist the operator in fulfilling
the responsibility of retracting the
sidestand. Please check carefully
the operating instructions listed
below and if there is any indication
of a malfunction, return the motorcycle to a Yamaha dealer immediately for repair.
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Sidestand/clutch switch
operation check
Check the operation of the sidestand switch and clutch switch
against the information below.
TURN THE MAIN SWITCH TO “ON”
AND THE ENGINE STOP SWITCH TO
“#”.
TRANSMISSION IS IN GEAR AND
SIDESTAND IS UP.
PULL IN CLUTCH LEVER AND
PUSH THE START SWITCH.
ENGINE WILL START.
CLUTCH SWITCH IS OK.
SIDESTAND IS DOWN.
ENGINE WILL STALL.
SIDESTAND SWITCH IS OK.
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If improper operation is noted,
consult a Yamaha dealer immediately.
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3-11
PRE-OPERATION CHECKS
Owners are personally responsible for their vehicle’s condition. Your motorcycle’s vital functions can start to
deteriorate quickly and unexpectedly, even if it remains unused (for instance, if it is exposed to the elements).
Any damage, fluid leak or loss of tire pressure could have serious consequences. Therefore, it is very important
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that, in addition to a thorough visual inspection, you check the following points before each ride.
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Front brake
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Rear brake
Clutch
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Throttle grip and housing
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Engine oil
Drive chain
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Wheels and tires
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Control and meter cable
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Brake and shift pedal shafts
Brake and clutch lever pivots
PRE-OPERATION CHECK LIST
ITEM CHECKS PAGE
9 Check operation, free play, fluid level and vehicle for fluid leakage.
9 Fill with DOT 4 (or DOT 3) brake fluid if necessary.
9 Check operation and free play.
9 Adjust if necessary.
9 Check operation and free play.
9 Adjust if necessary.
9 Check for smooth operation.
9 Lubricate.
9 Check oil level.
9 Fill with oil if necessary.
9 Check chain slack and condition.
9 Adjust if necessary.
9 Check tire pressure, wear, damage and spoke tightness.
9 Tighten spokes if necessary.
9 Check for smooth operation.
9 Lubricate if necessary.
9 Check for smooth operation.
9 Lubricate if necessary.
9 Check for smooth operation.
9 Lubricate if necessary.
3-4 ~ 3-5, 6-20 ~ 6-24
3-4, 6-19 ~ 6-20
6-16, 6-27
6-9 ~ 6-12
6-24 ~ 6-27
6-17 ~ 6-19
6-27
6-28
6-28
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4-1
ITEM CHECKS PAGE
Sidestand pivot
Chassis fasteners
Fuel tank
Lights, signals and
switches
Battery
PRE-OPERATION CHECKS
9 Check for smooth operation.
9 Lubricate if necessary.
9 Make sure that all nuts, bolts, and screws are properly tightened.
9 Tighten if necessary.
9 Check fuel level.
9 Fill with fuel if necessary.
9 Check for proper operation. 6-33 ~ 6-35
9 Check fluid level.
9 Fill with distilled water if necessary.
6-28
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3-5 ~ 3-6
6-30 ~ 6-32
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NOTE:
Pre-operation checks should be made each time the motorcycle 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.
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If any item in the Pre-Operation Check is not working properly, have it inspected and repaired before operating
the motorcycle.
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