Yamaha WR45OFR service manual Ignition Timing Check

IGNITION TIMING CHECK

INSP

ADJ

1

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

Inductive tachometer: YU-8036-B

Engine tachometer: 90890-03113

3.Check:

● Ignition timing

Checking steps:

●Start the engine and let it warm up. Let the engine run at the specified speed.

●Adjust the engine idling speed.

Refer to “IDLE SPEED ADJUSTMENT” section.

●Visually check the stationary pointer a is

within the firing range b on the rotor. Incorrect firing range → Check rotor and

pickup assembly.

4.Install:

● Timing plug

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