9-55
9
EBU27696Troubleshooting chartsStarting problems or poor engine performance
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.There is no fuel.
Check the battery.
Supply fuel.
The engine does not start.
Check the battery.
Operate the electric starter.4. Compression
There is compression.
There is no compression.
The engine does not start.
Have a Yamaha dealer check the ATV.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug. Have a Yamaha dealer check the ATV.
The engine does not start.
Check the compression.
DryWet
Operate the electric starter.
Have a Yamaha dealer check the ATV.
The engine does not start.
Check the ignition.
Operate the electric starter.2. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
UBCX61E0.book Page 55 Friday, January 22, 2021 1:54 PM
9-56
9
Engine overheating
WARNING
EWB02291Wait for the engine and radiator to cool before removing the radiator cap. You could be burned by
hot fluid and steam blown out under pressure. Always put a thick rag over the cap when opening.
Allow any remaining pressure to escape before completely removing the cap. TIP
Tap water can be used in an emergency. Change to the recommended coolant as soon as possible.
The engine will tend to overheat if the radiator is caked with mud, or if the ATV is overloaded. 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 check
and 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.
UBCX61E0.book Page 56 Friday, January 22, 2021 1:54 PM
12-1
12
INDEX
AAccessories and loading ................................................ 7-6
Air filter element, cleaning ............................................ 9-21BBattery .......................................................................... 9-45
Brake and clutch levers, checking and lubricating ...... 9-41
Brake fluid, changing ...................................................9-33
Brake fluid level, checking ........................................... 9-30
Brake lever ..................................................................... 5-6
Brake lever free play, checking the front ..................... 9-33
Brake light switches ..................................................... 9-36
Brake pads, checking the front and rear ..................... 9-29
Brake pedal .................................................................... 5-6
Brake pedal, checking and lubricating ........................ 9-41
Brake pedal height, checking ...................................... 9-34
Brakes .......................................................................... 9-29
Brakes, front and rear .................................................... 6-4
Brake/tail light .............................................................. 9-52CCables, checking and lubricating ................................. 9-40
Chassis fasteners ........................................................... 6-7
Cleaning ....................................................................... 10-1
Clutch lever .................................................................... 5-5
Clutch lever free play, adjusting ................................... 9-36
Coolant ................................................................. 6-4, 9-18
Coolant temperature warning light ................................. 5-2DDrive chain ..................................................................... 6-5
Drive chain, lubricating ................................................ 9-40 Drive chain slack .......................................................... 9-38
EEngine break-in .............................................................. 7-5
Engine idling speed ...................................................... 9-27
Engine oil ....................................................................... 6-4
Engine oil and oil filter element .................................... 9-12
Engine, start ................................................................... 7-1
Engine stop switch ......................................................... 5-4
Engine trouble warning light .......................................... 5-3FFuel ...................................................................... 5-10, 6-4
Fuel level warning light ................................................... 5-2
Fuel tank cap ................................................................. 5-9
Fuses, replacing ........................................................... 9-49HHandlebar switches ....................................................... 5-3
Headlight beam, adjusting ........................................... 9-52
Headlight bulb, replacing ............................................. 9-50IIdentification numbers ................................................... 1-1
Indicator lights and warning lights ................................. 5-1
Instruments, lights and switches ................................... 6-7LLabel locations ............................................................... 2-1
Light switch .................................................................... 5-4MMain switch .................................................................... 5-1
Maintenance chart, emission control system ................ 9-3
UBCX61E0.book Page 1 Friday, January 22, 2021 1:54 PM
