Yamaha YZF-R125 Service Manual: Checking the clutch plates

Yamaha YZF-R125 Service Manual / Engine / Clutch / Checking the clutch plates

The following procedure applies to all of the clutch plates.

1. Check:

  • Clutch plate Damage Replace the clutch
    plates as a set.

2. Measure:

  • Clutch plate warpage (with a surface plate and thickness gauge "1") Out of specification Replace
    the clutch plates as a set.

Checking the clutch plates


    Checking the friction plates
    The following procedure applies to all of the friction plates. 1. Check: Friction plate Damage/wear Replace the friction plates as a set. 2. Measure: Friction plate thickness Ou ...

    Checking the clutch springs
    The following procedure applies to all of the clutch springs. 1. Check: Clutch spring Damage Replace the clutch springs as a set. 2. Measure: Clutch spring free length "a" Out o ...

    Other materials:

    Checking the crankshaft position sensor
    1. Disconnect: Crankshaft position sensor coupler (from the wire harness) 2. Check: Crankshaft position sensor resistance Out of specification  Replace the crankshaft position sensor/stator assembly. a. Connect the pocket tester ( × 100) to the crankshaft position sensor c ...

    Checking and replacing the rear wheel sprocket
    1. Check: Rear wheel sprocket More than 1/4 tooth "a" wear Replace the rear wheel sprocket. Bent teeth Replace the rear wheel sprocket. b. Correct 1. Drive chain roller 2. Rear wheel sprocket 2. Replace: Rear wheel sprocket a. Remove the self-locking nuts and the ...

    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. 3. Check: Camshaft oil passage Obstruction Blow out with compressed air. ...

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