8-123
EBU00724
Troubleshooting chart
Starting problems or poor engine performance
1. Fuel
Check if there is fuel
in the fuel tank.
There is fuel.
Turn the fuel cock
lever to “OFF”.
No fuel.
Fuel cock is
clogged.
Clean the
fuel cock.
Some fuel.
Turn the fuel cock
lever to “RES”.
Restart the engine.
No fuel.
Supply fuel.
2. Compression
Use the electric
starter to see if
there is compression.
There is compression.
Compression normal.
No compression.
Ask a Yamaha dealer to
inspect.
3. Ignition
Remove the
spark plug and
check electrodes.
Wet
Wipe clean with dry cloth.
Dry
Attach spark plug cap and
ground to chassis.
Use the
electric starter.
Spark is good.
Ignition system is
normal.
Spark is weak.
Adjust the spark plug gap
or replace the spark plug.
No spark.
Ask a Yamaha dealer to
inspect.
4. Battery
Use the electric starter.
Engine turns over
quickly.
Battery is good.
Engine turns over
slowly.
Check the connections.
Check the
fuel flow.
Turn the fuel cock
lever to “ON”.
Remove the fuel hose
from the fuel cock.
U5LP62.book Page 123 Wednesday, May 8, 2002 11:24 AM
Summary of Contents for RAPTOR YFM660RR
Page 2: ...B6 fm Page 1 Monday June 18 2001 11 18 AM ...
Page 3: ...U5LP62 book Page 1 Wednesday May 8 2002 11 24 AM ...
Page 17: ...U5LP62 book Page 4 Wednesday May 8 2002 11 24 AM ...
Page 21: ...U5LP62 book Page 4 Wednesday May 8 2002 11 24 AM ...
Page 25: ...EETOC S fm Page 4 Wednesday May 8 2002 11 48 AM ...
Page 31: ...1 6 U5LP62 book Page 6 Wednesday May 8 2002 11 24 AM ...
Page 37: ...1 12 U5LP62 book Page 12 Wednesday May 8 2002 11 24 AM ...
Page 43: ...1 18 U5LP62 book Page 18 Wednesday May 8 2002 11 24 AM ...
Page 81: ...4 10 U5LP62 book Page 10 Wednesday May 8 2002 11 24 AM ...
Page 186: ...7 1 Riding Your ATV U5LP62 book Page 1 Wednesday May 8 2002 11 24 AM ...
Page 187: ...7 2 7 Conduite du VTT Conducción del ATV U5LP62 book Page 2 Wednesday May 8 2002 11 24 AM ...
Page 277: ...8 14 U5LP62 book Page 14 Wednesday May 8 2002 11 24 AM ...
Page 359: ...8 96 U5LP62 book Page 96 Wednesday May 8 2002 11 24 AM ...
Page 407: ...10 6 U5LP62 book Page 6 Wednesday May 8 2002 11 24 AM ...
Page 413: ...10 12 U5LP62 book Page 12 Wednesday May 8 2002 11 24 AM ...
Page 419: ...U5LP62 book Page 18 Wednesday May 8 2002 11 24 AM ...
Page 422: ...B6 fm Page 1 Monday June 18 2001 11 18 AM ...