Yamaha RAPTOR 250 Service Manual Page 77

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