Sym Mio 50 Service Manual page 103

8. V-Belt Drive System / Kick Starter
Inspection
The operation of movable drive face is means of
the weight roller to pressing on it with centrifuge
force. And then the speed is changed by the ramp
plate rotation.
Thus, if weight rollers are wear out or damage, the
centrifuge force will be effected.
Check if rollers are wear out or damage. Replace
it if necessary.
Measure each rollers' outer diameter. Replace it if
exceed the service limit.
Service limit: 15.4mm
Check the drive face boss if damaged or wear out.
Replace it if necessary.
Measure the drive face boss outer diameter.
Replace it if exceed the service limit
Service limit:
HU01U/W 23.94mm
HU05U 23.89mm
Measure the drive face boss's inner diameter.
Replace it if exceed the service limit.
Service limit:
HU01U/W 24.060mm
HU05U 24.015mm
Assembly / Installation
Install the weight roller.
Caution
The both ends of weight roller are different.
In order to prolong the roller life span and
prevent abnormal wearing out, install the
closed end onto the movable drive face in the
movement of CCW.
Install the ramp plate slide pieces (3 pieces) onto
the ramp plate.
Install the ramp plate.
8-8
To this chapter contents
Weight roller
Weight roller
Slide pieces
Movable drive face
Drive face boss
Closed end
Ramp plate