Yamaha YZF-R125 Service Manual: Ignition system

Electrical system
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Circuit diagram
2. Crankshaft position sensor 4. Main fuse 5. Main switch 8. Sidestand switch 9. Battery 17.Engine stop switch 23.Lean angle sensor 25.ECU (engine control unit) 26.Ignition coil 27.Spark ...

Other materials:

Checking the spark plug
1. Remove: Right side cover Refer to "GENERAL CHASSIS" on page 4-1. 2. Disconnect: Spark plug cap 3. Remove: Spark plug CAUTION:Before removing the spark plug, blow away any dirt accumulated in the spark plug well with compressed air to prevent it from falling ...

Adjusting the valve clearance
The following procedure applies to all of the valves. NOTE: Valve clearance adjustment should be made on a cold engine, at room temperature. When the valve clearance is to be measured or adjusted, the piston must be at top dead center (TDC) on the compression stroke. 1. Remove: ...

Checking the rear brake master cylinder
1. Check: Brake master cylinder Damage/scratches/wear Replace. Brake fluid delivery passages (brake master cylinder body) Obstruction Blow out with compressed air. 2. Check: Brake master cylinder kit Damage/scratches/wear Replace. 3. Check: Brake fluid reservoir Cracks/ ...

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