IGNITION TIMING CHECK

INSP

ADJ

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 “ENGINE IDLING 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 mark accessing screw

3 - 48

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Image 113
Yamaha WR250FM service manual Ignition Timing Check, Checking steps