Yamaha XMAX YP125R - Service manual > Oil pump (YP125R)

Removing the oil pump
Removing the oil pump

Checking the oil pump

1. Check:

Cracks/damage/wear → Replace the defective part(s).

2. Measure:

Out of specification → Replace the oil pump.

Checking the oil pump

1. Inner rotor

2. Outer rotor

3. Oil pump housing

Inner-rotor-to-outer-rotor-tip clearance

Less than 0.15 mm (0.0059 in) Limit 0.23 mm (0.0091 in)

Outer-rotor-to-oil-pump-housing clearance 0.013-0.018 mm (0.0005-0.0007 in)

Limit 0.25 mm (0.0098 in)

Oil-pump-housing-to-inner-andouter- rotor clearance 0.06-0.11 mm (0.0024-0.0043 in)

Limit 0.18 mm (0.0071 in)

3. Check:

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

Checking the oil pump

Assembling the oil pump

1. Lubricate:

Recommended lubricant Engine oil

2. Lubricate:

Recommended lubricant Molybdenum disulfide grease

3. Install:

TIP

When installing the inner rotor, align the pin "4" in the oil pump driven gear with the groove "a" in the inner rotor.

Assembling the oil pump

4. Check:

Installing the oil pump

1. Install:

Oil pump assembly screw 4 Nm (0.4 m*kgf, 2.9 ft*lbf)

NOTICE

After tightening the screws, make sure the oil pump turns smoothly.

Transmission (YP125R)

Removing the transmission
Removing the transmission

Removing the transmission
Removing the transmission

Removing the transmission

1. Remove:

TIP

Loosen each bolt 1/4 of a turn at a time, in stages and in a crisscross pattern. After all of the bolts are fully loosened, remove them.

Checking the transmission

1. Check:

Blue discoloration/pitting/wear → Replace the defective gear(s).

Cracks/damage/rounded edges → Replace the defective gear(s).

2. Check:

3. Check:

Rough movement → Replace the defective part(s).

Installing the transmission

1. Install:

Oil seal installed depth 0-0.5 mm (0-0.020 in)

Installing the transmission

a. Oil seal installed depth

See also:

 Yamaha XMAX YP125R - Service manual > Starter clutch and generator (YP125R)

Removing the generator cover and stator coil Removing the generator rotor and starter clutch

 Yamaha XMAX YP125R - Service manual > Crankshaft (YP125R)

Removing the crankshaft Removing the crankshaft Removing the crankshaft

Maxi Scooters: