Yamaha VK10W, Supplementary Service Manual

Page: 24 / 208

4
INSP
ADJ
DRIVE V-BELT
POWER TRAIN
DRIVE V-BELT
WARNING
When installing the new V-belt, make sure that
it is positioned from 1.5 mm (0.06 in) above
the edge of the secondary sheave to –0.5 mm
(–0.02 in) below the edge
a
.
If the V-belt is not positioned correctly, the
clutch engagement speed will be changed. The
machine may move unexpectedly when the
engine is started.
Adjust the V-belt position by removing or add-
ing a spacer
1
on each adjusting bolt
2
.
CAUTION:
As the V-belt wears, adjustment may be neces-
sary. To ensure proper clutch performance, the
V-belt position should be adjusted by adding a
spacer on each adjusting bolt when the V-belt
position reaches 1.5 mm (0.06 in) below the
edge.
New belt width:
34.1 mm (1.34 in)
Belt wear limit width:
32.1 mm (1.26 in)
1. Measure:
• V-belt position
a
NOTE:
Install the new V-belt onto the secondary sheave
only. Do not force the V-belt between the sheaves;
the sliding and fixed sheaves must touch each
other.
Standard V-belt height:
–0.5 ~ 1.5 mm (–0.02 ~ 0.06 in)