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

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:

Checking the fid (fast idle solenoid)
1. Disconnect: FID (fast idle solenoid) coupler 2. Check: FID (fast idle solenoid) resistance a. Disconnect the FID (fast idle solenoid) coupler from the FID. b. Connect the pocket tester ( × 10) to the terminals of the FID (fast idle solenoid). Positive tester probe ...

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 ...

Bearings and oil seals
Install bearings "1" and oil seals "2" so that the manufacturer's marks or numbers are visible. When installing oil seals "1", lubricate the oil seal lips with a light coat of lithium-soap-based grease. Oil bearings liberally when installing, if appropriate. CAUTION:Do not spin th ...