Yamaha YZF-R125 Service Manual: Checking the shift forks

Yamaha YZF-R125 Service Manual / Engine / Transmission / Checking the shift forks

The following procedure applies to all of the shift forks.

1. Check:

  • Shift fork cam follower "1"
  • Shift fork pawl "2" Bends/damage/scoring/wear
    Replace the shift fork.

Checking the shift forks


2. Check:

  • Shift fork guide bar Roll the shift fork guide bar on a flat surface.

    Bends  Replace.


WARNING

Do not attempt to straighten a bent shift fork guide bar.

Checking the shift forks


3. Check:

Shift fork movement (along the shift fork guide bar) Rough movement Replace the shift
forks and shift fork guide bar as a set.

Checking the shift forks


    Transmission
    ...

    Checking the shift drum assembly
    1. Check: Shift drum groove Damage/scratches/wear Replace the shift drum assembly. Shift drum segment "1" Damage/wear  Replace the shift drum assembly. Shift drum bearing "2" ...

    Other materials:

    Lubricating the drive chain
    The drive chain consists of many interacting parts. If the drive chain is not maintained properly, it will wear out quickly. Therefore, the drive chain should be serviced, especially when the vehicle is used in dusty areas. This vehicle has a drive chain with small rubber O-rings between eac ...

    Installing the relay arm
    1. Lubricate: Spacers Bearings Oil seals Bolts (unthreaded shaft portion only) 2. Install: Bearing "1" (to the relay arm) Oil seal "2" (to the relay arm) 3. Rear shock absorber assembly 4. Relay arm 5. Connecting arm A. Left side B. Right side ...

    Disassembling the front fork legs
    The following procedure applies to both of the front fork legs. 1. Remove: Rubber cap Clip "1" Front fork cap "2" (with O-ring) Fork spring NOTE: Push the front fork cap in the direction of the arrow shown in the illustration to remove the clip. 2. Drain: Fork oil NOTE ...

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