Yamaha YZF-R125 Service Manual: Checking the primary drive gear

Yamaha YZF-R125 Service Manual / Engine / Clutch / Checking the primary drive gear

1. Remove:

  • Primary drive gear Refer to "BALANCER GEAR" on page 5-53.

2. Check:

  • Primary drive gear Damage/wear  Replace the
    primary drive gear and clutch housing as a set.

    Excessive noise during operation Replace
    the primary drive gear and clutch housing as a set

3. Install:

  • Primary drive gear Refer to "BALANCER GEAR" on page 5-53.
    Checking the clutch boss
    1. Check: Clutch boss splines Damage/pitting/wear Replace the clutch boss. NOTE: Pitting on the clutch boss splines will cause erratic clutch operation. Checking the pressure plate 1. C ...

    Checking the primary driven gear
    1. Check: Primary driven gear "1" Damage/wear Replace the primary drive gear and clutch housing as a set. Excessive noise during operation  Replace the primary drive gear and ...

    Other materials:

    Checking the decompression system
    1. Check: Decompression system a. Check the decompression system with the camshaft sprocket and the decompression cam installed to the camshaft. b. Check that the decompression lever "1" moves smoothly. c. Without operating the decompression lever, check that the decompression cam " ...

    Adjusting the engine idling speed
    The engine idling speed must be checked and, if necessary, adjusted as follows at the intervals specified in the periodic maintenance and lubrication chart. The engine should be warm before making this adjustment. Remove panel A. Check the engine idling speed and, if necessary, ...

    Checking the ignition timing
    NOTE: Prior to checking the ignition timing, check the wiring connections of the entire ignition system. Make sure all connections are tight and free of corrosion. 1. Remove: Rider seat Left lower side cowling Refer to "GENERAL CHASSIS" on page 4-1. 2. Remove: Timing mark acces ...

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