EAU25922
Troubleshooting charts
Starting problems or poor engine performance
Check the fuel level in
the fuel tank.
1. FuelThere is enough fuel.
There is no fuel.Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.
2. CompressionThere is compression.
There is no compression.Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plug
and check the electrodes.
3. IgnitionWipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.
4. BatteryThe engine turns over
quickly.
The engine turns over
slowly.The battery is good.
Check the battery lead connections,
and charge the battery if necessary.
Dry
WetOpen the throttle halfway and operate
the electric starter.
PERIODIC MAINTENANCE AND ADJUSTMENT
6-37
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Engine overheatingEWA10400
●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.
●After removing the radiator cap retaining bolt, place a thick rag, like a towel, over the radiator cap, and then
slowly rotate the cap counterclockwise to the detent to allow any residual pressure to escape. When the his-
sing sound has stopped, press down on the cap while turning it counterclockwise, and then remove the cap.
TIP
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.
Wait until the
engine has cooled.Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.
The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.
Add coolant. (See TIP.)
Start the engine. If the engine overheats again, have a
Yamaha dealer check and repair the cooling system.
There is
leakage.
There is
no leakage.
WARNING
PERIODIC MAINTENANCE AND ADJUSTMENT
6-38
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AAir filter element .......................................6-15
Anti-theft device housing .........................3-12
Autolube pump, adjusting........................6-27
BBattery......................................................6-30
Brake and clutch levers, checking and
lubricating ..............................................6-27
Brake and shift pedals, checking and
lubricating ..............................................6-27
Brake fluid level, checking .......................6-22
Brake fluid, changing ...............................6-23
Brake lever .................................................3-6
Brake pedal ................................................3-6
Brake pedal free play, adjusting ..............6-20
CCables, checking and lubricating ............6-26
Carburetor, adjusting ...............................6-16
Care............................................................7-1
Catalytic converter .....................................3-9
Clutch lever ................................................3-5
Clutch lever free play, adjusting...............6-19
Coolant.....................................................6-13
Coolant temperature warning light ............3-3
Cowlings and panels, removing and
installing ...................................................6-8
DDimmer switch ...........................................3-4
Drive chain slack ......................................6-24
Drive chain, cleaning and lubricating.......6-25
EEngine break-in ..........................................5-3
Engine idling speed .................................6-16
Engine oil ...................................................3-9Engine stop switch ....................................3-5
Engine trouble warning light ......................3-3
Engine, starting a warm .............................5-2
FFront and rear brake pads, checking ......6-21
Front brake lever free play, checking.......6-20
Front fork, checking .................................6-28
Fuel ............................................................3-7
Fuel cock..................................................3-10
Fuel consumption, tips for reducing ..........5-3
Fuel tank breather/overflow hose ..............3-8
Fuel tank cap .............................................3-6
Fuse, replacing.........................................6-31
HHandlebar switches ...................................3-4
Headlight bulb, replacing .........................6-32
Horn switch ................................................3-4
IIdentification numbers ...............................9-1
Ignition circuit cut-off system ..................3-13
Indicator and warning lights ......................3-2
KKey identification number ..........................9-1
LLicense plate light bulb, replacing ...........6-35
MMain switch/steering lock ..........................3-1
Maintenance and lubrication, periodic ......6-4
Maintenance, emission control system .....6-3
Matte color, caution ...................................7-1
Model label ................................................9-2
NNeutral indicator light.................................3-2
OOil level warning light .................................3-2
PParking .......................................................5-4
Part locations .............................................2-1
Pass switch ................................................3-4
Pre-operation check list .............................4-2
RRear brake light switch, adjusting ...........6-21
Rear view mirrors .....................................3-12
SSafety information ......................................1-1
Seat ..........................................................3-11
Shift pedal ..................................................3-5
Shift pedal position, adjusting .................6-21
Shifting .......................................................5-2
Sidestand .................................................3-13
Sidestand, checking and lubricating .......6-28
Spark plug, checking ...............................6-10
Specifications.............................................8-1
Speedometer unit ......................................3-3
Start switch ................................................3-5
Starter (choke) lever .................................3-11
Starting a cold engine ................................5-1
Steering, checking ...................................6-29
Storage.......................................................7-3
TTachometer ................................................3-4
Tail/brake light bulb, replacing .................6-33
Throttle cable free play, adjusting ............6-17
Throttle grip and cable, checking and
lubricating ..............................................6-26
Tires .........................................................6-17
Tool kit ........................................................6-1
INDEX
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