Yamaha YZF-R125 Service Manual: 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 strainer
1. Check:
Oil strainer
Damage Replace.
Contaminants Clean with solvent.
Checking the crankcase
1. Thoroughly wash the crankcase halves in a
mild solvent.
2. Thoroughly clean all the gasket surfaces and
crankcase mating surfaces.
3. Check:
Crankcase
Cracks/damage Replace.
Oil de ...
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.
...
Other materials:
Chain drive
Removing the drive chain
1. Stand the vehicle on a level surface.
WARNINGSecurely support the vehicle so that there
is
no danger of it falling over.
NOTE:
Place the vehicle on a suitable stand so that the
rear wheel is elevated. ...
Important manual information
Particularly important information is distinguished in this manual by the
following notations:
This is the safety alert symbol. It is used to alert you to potential personal
injury
hazards. Obey all safety messages that follow this symbol to avoid possible
injury
or death.
WARNING
...
Engine tightening torques
Cylinder head tightening sequence:
Generator cover tightening sequence:
Clutch cover tightening sequence:
Crankcase tightening sequence:
A. Left crankcase
B. Right crankcase ...