Operational Precautions; Trouble Diagnosis - Sym Mio 50 Service Manual

8. V-Belt Drive System / Kick Starter

Operational Precautions

General Information
Movable drive face, clutch, and driven pulley can be serviced on the motorcycle.
Drive belt and driven pulley surface must be free of grease.
Specification
Item
Drive belt width
ID of movable drive face
OD of drive face boss
OD of roller
ID of clutch outer
Thickness of clutch lining
Free length of driven pulley spring
OD of driven pulley
ID of sliding driven pulley
Torque value:
Movable drive face nut: 5.0~6.0kgf-m
Clutch outer nut: 5.0~6.0kgf-m
Driven pulley nut: 5.0~6.0kgf-m

Trouble Diagnosis

Engine can be started but motorcycle can
not be moved
1. Worn drive Belt
2. Worn ramp 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
To this chapter contents
HU10U/W
Standard value
17.800~18.200
23.989~24.052
23.960~23.974
15.920~16.080
112.000~122.200 112.500
2.000
¢ w ¢ w
156.000
33.965~33.985
34.000~34.025
Special Service Tools
Clutch spring compressor SYM-2301000
Bearing puller (inner type) SYM-6204002
Clutch mounting nut wrench SYM-9020200
Universal fixture SYM-2210100
Insufficient horsepower or poor high
speed performance
1. Worn drive belt
2. Insufficient spring capacity of driven pulley
3. Worn roller
4. Driven pulley operation un-smoothly
Limit Standard value
17.200 17.800~18.200
24.060 23.964~23.985
23.940 23.910~23.926
15.400 15.920~16.080
107.000~107.200
1.500 2.00
¢ w ¢ w
33.940 33.965~33.985
34.060 34.000~34.025
Unit: mm
HU05U
Limit
17.200
24.015
23.890
15.400
107.500
1.500
87.900
33.940
34.060