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:

    Removing the front wheel (disc)
    1. Stand the vehicle on a level surface. WARNINGSecurely support the vehicle so that there is no danger of it falling over. 2. Elevate: Front wheel NOTE: Place the vehicle on a suitable stand so that the front wheel is elevated. 3. Remove: Front brake caliper NO ...

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    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 ...

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