Generic TR 125 Service Manual page 132

Inspection
Check respectively whether the tooth surface of the
wheel gear and the drive claw are worn.
If badly worn or damaged, replace it.
Remove the bearings and oil seals of the left and right crankcase.
Check whether they are damaged; if there is any, replace it.
Attention:
The bearing that is knocked out can not be used again; replace it.
Disassemble the bearing and oil seals using special tools.
Combine spindle and layshaft
Attention:
Apply lubrication oil evenly onto each gear and shaft while combining. Make sure that there is no jamming for
each gear after combination.
Attention:
Assemble the crankcase in accordance with the reverse order of the removal.
Tooth
surface
- 127 -
Drive
claw