Generic TR 125 Service Manual page 119

Table of standard values of baseline projects and allowable limit
Clearance between the left and the
Bent axle
connecting rod
assembly, clutch
Flatness of running friction plate
Thickness of surface needle roller
Outer diameter of shifting fork axis
Diameter of bore of shifting fork
Gearshift
mechanism
13.2 Fault Diagnosis
Low compression pressure
Crankcase air leakage
Engine overheat
Clutch clipping
Poor lubrication
Failure in gear
Gear shift fork broken or deformation
Shifting fork guide pin broken
Wheel gear convex claw worn
Auto-off gear
The joint claw is worn with the edge into a fillet.
Force of return spring of the speed shifting mechanism is weakened.
The spline tooth of spline shaft and the spline groove of sliding gear are worn, resulting a greater axial force in
the gear while working.
Gearshift hub and shifting fork are worn.
Abnormal sound in the crankcase
There are parts scattered or broken inside the crankcase
Engine stalling
Clutch is stuck
Shifting difficulty
Separation between the clutches is not complete
Poor returning spring of the clutch
Locked grove of the gearshift hub worn
Item
right of the big end of the
connecting rod
Connecting rod big end radial
clearance
Jump
Thickness of friction plate
Length of pressure spring
Thickness of shifting fork
Outer diameter of gearshift hub
Width of gearshift hub locked
groove
Standard
0.1-0.35
0.008-0.018
-
2.8-2.9
0.04
30.4-31.6
1.88-2
9.98-9.995
10-10.018
4.8-4.9
41.8-42
5.45-5.55
- 114 -
Unit: mm
Allowable limit
0.5
-
0.03
2.5
0.2
29.7
1.8
9.96
10.05
4.6
41.75
5.7