Precautions In Operation; Troubleshooting - Sym RV 250i Service Manual

8. V-Belt Drive System

Precautions in Operation

General Information
Drive face, clutch outer, and driven pulley can be serviced on the motorcycle.
Drive belt and drive pulley must be free of grease.
Specification
Item
Drive belt width
OD of movable drive face boss
ID of movable drive face
OD of weight roller
ID of clutch outer
Thickness of clutch weight
Free length of driven pulley spring
OD of driven pulley boss
ID of driven face
Weight of weight roller
Torque value
Drive face nut: 8.5~10.5kgf-m
Clutch outer nut: 5.0~6.0kgf-m
Drive plate nut: 5.0~6.0kgf-m

Troubleshooting

Engine can be started but motorcycle can
not be moved
1. Worn drive Belt
2. Worn drive face
3. Worn or damaged clutch weight
4. Broken driven pulley
Shudder or misfire when driving
1. Broken clutch weight
2. Worn clutch weight
8-2
To this chapter contents
Standard value
29.946~29.980 mm
30.000~30.040 mm
19.500~20.000 mm
144.850~145.150 mm
40.950~40.990 mm
41.000~41.050 mm
17.700~18.300
Special Service Tools
Clutch spring compressor:
Inner bearing puller:
Clutch nut wrench 39 x 41 mm:
Universal holder:
Bearing driver:
Insufficient horsepower or poor high
speed performance
1. Worn drive belt
2. Insufficient spring force of driven pulley
3. Worn roller
4. Driven pulley operation un-smoothly
24.000 mm
6.000 mm
102.400 mm
g
SYM-2301000
SYM-6204002
SYM-2210100
SYM-9100100
Limit
22.500 mm
29.926 mm
30.060 mm
19.000 mm
145.450 mm
3.000 mm
97.400 mm
40.930 mm
41.070 mm
17.200 g
SYM-9020200