Yamaha YZF-R125 Service Manual: Checking the camshaft

Yamaha YZF-R125 Service Manual / Engine / Camshaft / Checking the camshaft

1. Check:

  • Camshaft lobes Blue discoloration/pitting/scratches 
    Replace the camshaft.

2. Measure:

  • Camshaft lobe dimensions "a" and "b" Out of specification Replace
    the camshaft.

Checking the camshaft


3. Check:

Camshaft oil passage Obstruction Blow out with
compressed air.

    Camshaft
    ...

    Checking the rocker arms and rocker arm shafts
    The following procedure applies to all of the rocker arms and rocker arm shafts. 1. Check: Rocker arm Damage/wear Replace. 2. Check: Rocker arm shaft Blue discoloration/excessive wea ...

    Other materials:

    Installing the swingarm
    1. Lubricate: Bearings Spacers Dust covers Pivot shaft 2. Install: Bearings "1" 2. Swingarm A. Left side B. Right side 3. Install: Swingarm adjusting collar "1" Swingarm "2" Pivot shaft Pivot shaft nut "3" a. Install, and then fully turn in the swingarm adju ...

    Introduction
    WARNINGDisc brake components rarely require disassembly. Therefore, always follow these preventive measures: Never disassemble brake components unless absolutely necessary. If any connection on the hydraulic brake system is disconnected, the entire brake sy ...

    Chain drive
    Removing the drive chain 1. Stand the vehicle on a level surface. WARNINGSecurely support the vehicle so that there is no danger of it falling over. NOTE: Place the vehicle on a suitable stand so that the rear wheel is elevated. ...

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