Maintenance Description; Trouble Diagnosis - Sym EuroMX 125 Service Manual

8. V-Belt Driving System/Foot Starter

Maintenance Description

PRECAUTIONS IN OPERATION
• Driving pulley, clutch, and driven pulley can be serviced on the motorcycle.
• Driving belt and driving pulley surface must be free of grease.
Specification
Item
Driving belt width
ID of sliding pulley bushing
OD of sliding pulley hub
OD of weight roller
ID of clutch jacket
Thickness of clutch lining
Free length of driving pulley spring
OD of driving pulley
ID of sliding pulley
ID: Inner Diameter
OD: Outer diameter
Torque value
Sliding pulley nut: 5.0~6.0 kgf-m
Clutch jacket nut: 5.0~6.0 kgf-m
driving pulley nut: 5.0~6.0 kgf-m

Trouble Diagnosis

Engine can be started but motorcycle can
not be moved
1. Worn driving Belt
2. Worn tilt plate
3. Worn or damaged clutch lining
4. Broken driven pulley
Shudder or misfire when driving
1. Broken clutch lining
2. Worn clutch lining
8-2
This Chapter Contents
Standard value
19.500
27.000~27.021
26.970~26.990
19.950~20.100
130.000~130.200
4.000~4.100
128.400
33.965~33.985
34.000~34.025
Special Service Tools
Clutch spring compressor
Bearing puller (inner type)
Clutch mounting nut wrench
Universal fixture
Insufficient horsepower or poor high speed
performance
1. Worn driving belt
2. Insufficient spring capacity of driven pulley
3. Worn roller
4. Driven pulley operation un-smoothly
Unit: mm
Limit
18.500
27.060
26.940
19.500
130.500
2.000
123.400
33.940
34.060