Yamaha WR450F, Owner'S Service Manual

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INSP
ADJ
IGNITION TIMING CHECK
IGNITION TIMING CHECK
1. Remove:
• Timing plug
1
1
2. Attach:
• Timing light
• Inductive tachometer
To the ignition coil lead (orange lead
1
).
Timing light:
YM-33277-A/90890-03141
1
3. Adjust:
• Engine idling speed
Refer to “IDLE SPEED ADJUSTMENT”.
4. Check:
• Ignition timing
Visually check the stationary pointer
a
is
within the firing range
b
on the rotor.
Incorrect firing range
→
Check rotor and
pickup assembly.
5. Install:
• Timing plug