Yamaha YZF-R125 Service Manual: Checking the front wheel

Yamaha YZF-R125 Service Manual / Chassis / Front wheel / Checking the front wheel

1. Check:

Front wheel axle Roll the wheel axle on a flat surface.

Bends → Replace.

WARNING

Do not attempt to straighten a bent wheel axle.

Checking the front wheel


2. Check:

  • Tire
  • Front wheel Damage/wear → Replace.

    Refer to "CHECKING THE TIRES" on page 3-23 and "CHECKING THE WHEELS" on page 3-25.

3. Measure:

  • Radial wheel runout "1"
  • Lateral wheel runout "2" Over the specified limits → Replace.


Checking the front wheel


4. Check:

  • Wheel bearings Front wheel turns roughly or is loose Replace
    the wheel bearings.
  • Oil seal Damage/wear Replace.

    Disassembling the front wheel
    1. Remove: Oil seal Wheel bearings a. Clean the surface of the front wheel hub. b. Remove the oil seal "1" with a flat-head screwdriver. NOTE: To prevent damaging the wheel, place a rag ...

    Assembling the front wheel
    1. Install: Wheel bearings Oil seal a. Install the new wheel bearings and oil seal in the reverse order of disassembly. CAUTION:Do not contact the wheel bearing inner race " ...

    Other materials:

    Installing the steering head
    1. Lubricate: Upper bearing Lower bearing Bearing races 2. Install: Lower ring nut Rubber washer Upper ring nut Lock washer Refer to "CHECKING AND ADJUSTING THE STEERING HEAD" on page 3-22. 3. Install: Upper bracket Steering stem nut NOTE: Temporarily tighten t ...

    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. b. Correct 1. Drive chain roller 2. Drive chain sprocket Checking the rear wheel sprocket Refer to "CHECKING AND R ...

    Starting failures
    Engine 1. Cylinder and cylinder head - Loose spark plug - Loose cylinder head or cylinder - Damaged cylinder head gasket - Damaged cylinder gasket - Worn or damaged cylinder - Incorrect valve clearance - Improperly sealed valve - Incorrect valve-to-valve-seat contact - Incorrect valve timi ...

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