Troubleshooting Charts - Yamaha XT660R Owner's Manual

PERIODIC MAINTENANCE AND MINOR REPAIR

Troubleshooting charts

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.
2. Compression
6
Operate the electric starter.
3. Ignition
Remove the spark plug
and check the electrodes.
4. Battery
Operate the electric starter.
There is enough fuel.
Check the compression.
There is no fuel. Supply fuel.
There is compression. Check the ignition.
Have a Yamaha dealer
There is no compression.
check the vehicle.
Wipe off with a dry cloth and correct the
Wet
spark plug gap, or replace the spark plug.
Dry Have a Yamaha dealer check the vehicle.
The engine turns over
The battery is good.
quickly.
The engine turns over
Check the battery lead connections,
slowly. and charge the battery if necessary.
6-40
The engine does not start.
Check the compression.
Open the throttle halfway and operate
the electric starter.
The engine does not start.
Check the battery.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
EAU25921
EWA10840