Yamaha YZF-R125 Service Manual: Checking the oil pump

Yamaha YZF-R125 Service Manual / Engine / Oil pump / Checking the oil pump

1. Check:

  • Oil pump drive gear
  • Oil pump driven gear
  • Oil pump housing
  • Oil pump housing cover Cracks/damage/wear Replace the
    defective part(s).

2. Measure:

  • Inner-rotor-to-outer-rotor-tip clearance "a"
  • Outer-rotor-to-oil-pump-housing clearance "b"
  • - Oil-pump-housing-to-inner-rotor-and-outerrotor clearance "c"

Out of specification Replace
the oil pump.

Checking the oil pump


1. Inner rotor

2. Outer rotor

3. Oil pump housing


3. Check:

Oil pump operation Rough movement Repeat steps (1)
and (2) or replace the defective part(s).

Checking the oil pump


    Oil pump
    ...

    Assembling the oil pump
    1. Lubricate: Oil pump inner rotor Oil pump outer rotor Oil pump driven gear (with the recommended lubricant) 2. Install: Oil pump outer rotor Oil pump inner rotor "1" Oil pump dr ...

    Other materials:

    Installing the thermostat
    1. Install: Thermostat NOTE: Install the thermostat with its breather hole "a" facing up. 2. Install: Copper washer Coolant temperature sensor CAUTION:Use extreme care when handling the coolant temperature sensor. Replace any part that was dropped or subjected to ...

    Checking the crankshaft position sensor
    1. Disconnect: Crankshaft position sensor coupler (from the wire harness) 2. Check: Crankshaft position sensor resistance Out of specification  Replace the crankshaft position sensor/stator assembly. a. Connect the pocket tester ( × 100) to the crankshaft position sensor c ...

    Adjusting the brake pedal free play
    Adjusting the brake pedal free play Brake pedal free play The brake pedal free play should measure 3.5-4.5 mm (0.14-0.18 in) as shown. Periodically check the brake pedal free play and, if necessary, have a Yamaha dealer adjust it. WARNING An incorrect brake pedal free play in ...

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