Checking The Ignition Timing - Yamaha YFM660RN Service Manual

CHECKING THE IGNITION TIMING

CHECKING THE IGNITION TIMING
NOTE:
Engine idling speed and throttle cable free play
should be adjusted properly before checking
the ignition timing.
1.Attach:
2.Check:
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Checking steps:
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3.Detach:
3 - 17
Tachometer
Timing light
(to spark plug lead)
Timing light:
P/N. YM-33277-A, 90890-03141
Ignition timing
Warm up the engine and keep it at the speci-
fied speed.
Engine speed:
1,450 ~ 1,550 r/min
Remove the timing mark accessing screw 1.
Visually check the stationary pointer 2 to
verify it is within the required firing range 3
indicated on the flywheel.
Incorrect firing range → Check the pulser coil
assembly.
Install the timing mark accessing screw.
Timing light
Tachometer
CHK
ADJ