Yamaha YZF-R125 Service Manual: Checking the drive sprocket

Yamaha YZF-R125 Service Manual / Chassis / Chain drive / Checking the drive sprocket

1. Check:

  • Drive sprocket More than 1/4 tooth "a" wear
    Replace the drive chain sprockets as a set.

    Bent teeth Replace the drive
    chain sprockets as a set.

Checking the drive sprocket


b. Correct

1. Drive chain roller

2. Drive chain sprocket

Checking the rear wheel sprocket

Refer to "CHECKING AND REPLACING THE REAR WHEEL SPROCKET" on page 4-15.

Checking the rear wheel drive hub

Refer to "CHECKING THE REAR WHEEL DRIVE HUB" on page 4-15.

    Checking the drive chain
    1. Measure: 15-link section "a" of the drive chain Out of specification Replace the drive chain. a. Measure the length "a" between the inner sides of the pins and the length "b" between t ...

    Installing the drive chain
    1. Lubricate: Drive chain Master link 2. Install: Drive sprocket Drive sprocket retainer bolts 3. Install: Master link O-rings Master link plate Master link clip "1" ...

    Other materials:

    Installing the starter clutch
    1. Install: Starter clutch assembly Starter clutch bolts "1" NOTE: While holding the generator rotor "2" with the sheave holder "3", tighten the starter clutch bolts. Do not allow the sheave holder to touch the projection on the generator rotor. Stake the end "a" of each start ...

    Starting the engine
    In order for the ignition circuit cut-off system to enable starting, one of the following conditions must be met: The transmission is in the neutral position. The transmission is in gear with the clutch lever pulled and the sidestand up. 1. Turn the key to "ON" and make sure ...

    Storage
    Short-term Always store your motorcycle in a cool, dry place and, if necessary, protect it against dust with a porous cover. NOTICE Storing the motorcycle in a poorly ventilated room or covering it with a tarp, while it is still wet, will allow water and humidity to seep in and ...

    2025 Copyright www.yam-r125.net |