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 relays
    Check each switch for continuity with the pocket tester. If the continuity reading is incorrect, replace the relay. 1. Disconnect the relay from the wire harness. 2. Connect the pocket tester ( × 1) and battery (12 V) to the relay terminal as shown. Check the relay operation. Out ...

    Replacing an auxiliary light bulb
    This model is equipped with two auxiliary lights. If an auxiliary light bulb burns out, replace it as follows. Remove the socket (together with the bulb) by pulling it out. Auxiliary light bulb Remove the burnt out bulb by pulling it out. Insert a new bulb into t ...

    Checking the fuel line
    1. Remove: Left side panel Refer to "GENERAL CHASSIS" on page 4-1. 2. Lift the fuel tank. (Do not disconnect the fuel hose, drain hose 3. Check: Fuel hose "1" Cracks/damage → Replace. Loose connection Connect properly. 4. Install: Fuel tank Refer to "FUEL TANK" on pa ...

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