Yamaha YZF-R125 Service Manual: Checking the bearings and oil seal

Yamaha YZF-R125 Service Manual / Engine / Crankcase / Checking the bearings and oil seal

1. Check:

  • Bearings

Clean and lubricate the bearings, and then rotate the inner race with your finger.

Rough movement Replace.


  • Oil seal

Damage/wear Replace.


    Checking the timing chain and timing chain guide
    1. Check: Timing chain Damage/stiffness Replace the timing chain and camshaft sprocket as a set. 2. Check: Timing chain guide (intake side) Damage/wear Replace. Checking the oil stra ...

    Installing the bearing retainer
    1. Install: Bearing retainer "1" NOTE: Install the bearing retainer "1" with its "OUT" mark "a" facing outward. Apply locking agent (LOCTITE) to the threads of the bearing retainer bo ...

    Other materials:

    Engine oil and oil filter element
    The engine oil level should be checked before each ride. In addition, the oil must be changed and the oil filter element replaced at the intervals specified in the periodic maintenance and lubrication chart. To check the engine oil level Place the vehicle on a level surface and hol ...

    Checking the front brake hose
    1. Check: Brake hose "1" Cracks/damage/wear  Replace. 2. Check: Brake hose holder "2" Loose connection Tighten the holder bolt. 3. Hold the vehicle upright and apply the front brake several times. 4. Check: Brake hose Brake fluid leakage Replace the da ...

    Checking the decompression system
    1. Check: Decompression system a. Check the decompression system with the camshaft sprocket and the decompression cam installed to the camshaft. b. Check that the decompression lever "1" moves smoothly. c. Without operating the decompression lever, check that the decompression cam " ...

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