Sym GTS 250 Service Manual page 103

8. V-Belt Driving System
Inspection
The weight rollers are to press movable drive face
by means of centrifuge force.
Thus, if weight rollers are worn out or damaged,
the centrifuge force will be affected.
Check if rollers are worn or damaged. Replace it
if necessary.
Measure each roller's outer diameter. Replace it if
exceed the service limit.
Service limit: 19.0 mm
Weight: 17.2g
Check if drive face boss is worn or damaged and
replace it if necessary.
Measure the outer diameter of movable drive face
boss, and replace it if it exceed service limit.
Service limit: 29.962 mm
Measure the inner diameter of movable drive face,
and replace it if it exceed service limit.
Service limit: 30.060 mm
Reassembly/installation
Install weight rollers.
Caution
The weight roller two end surfaces are not
certainly same. In order to lengthen the roller
life and prevented exceptionally wears the
occurrence, Please end surface of the closure
surface counter clockwise assembles onto
movable drive face.
Install ramp plate.
8-8
To this chapter contents
Weight roller
Ramp plate
Guide collar
Weight roller
Movable drive face
Drive face boss
Closure surface