PERIODIC MAINTENANCE AND ADJUSTMENT
7-38
2
3
4
5
6
7
8
9
EAU42701
Troubleshooting charts
Starting 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 compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.
2. Compression
There 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. Ignition
Wipe 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. Battery
The 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
Wet
Operate the electric starter.
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Summary of Contents for MAJESTY YP400A
Page 1: ...OWNER S MANUAL 34B 28199 72 YP400A Read this manual carefully before operating this vehicle ...
Page 11: ...LOCATION OF IMPORTANT LABELS 1 4 1 2 3 4 5 6 7 8 9 1 1 3JK 82377 10 ...
Page 97: ...INDEX Wheel bearings checking 7 31 Wheels 7 24 ...
Page 98: ...PRINTED ON RECYCLED PAPER YAMAHA MOTOR CO LTD PRINTED IN JAPAN 2010 03 0 1 1 E ...