Checking The Ignition Timing - Yamaha YFM250RX 2008 Service Manual

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CHECKING THE IGNITION TIMING

EBS00058
CHECKING THE IGNITION TIMING
NOTE: NOTE:
Engine idling speed and throttle cable free play
should be adjusted properly before checking
the ignition timing.
1. Attach:
• digital tachometer
• timing light
2. Check:
• ignition timing
a. Warm up the engine and keep it at the
b. Remove the timing mark accessing screw
c. Visually check the stationary pointer
a
b
d. Install the timing mark accessing screw.
3. Detach:
• timing light
• digital tachometer
3-16
Digital tachometer
90890-06760, YU-39951-B
(onto the ignition coil spark plug lead)
Timing light
90890-03141
Inductive clamp timing light
YU-03141
specified speed.
Engine speed
1,500 ~ 1,600 r/min
.
verify it is within the required firing range
indicated on the AC magneto rotor.
Incorrect firing range → Check the pickup
coil assembly.
CHK
ADJ
to