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 crankshaft
    1. Measure: Crankshaft runout Out of specification Replace the crankshaft, bearing or both. NOTE: Turn the crankshaft slowly. 2. Measure: Big end side clearance Out of specification Replace the crankshaft. 3. Measure: Crankshaft width Out of specification&nbs ...

    Rider seat
    To remove the rider seat Insert the key into the seat lock, and then turn it clockwise. Seat lock Open. Pull the rider seat off. To install the rider seat 1. Insert the projection on the front of the rider seat into the seat holder as shown. Projection ...

    Coolant
    The coolant level should be checked before each ride. In addition, the coolant must be changed at the intervals specified in the periodic maintenance and lubrication chart. To check the coolant level Place the vehicle on a level surface and hold it in an upright position. TIP ...

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