Power Train; Sheave Offset Adjustment - Yamaha RS90K Service Manual

SHEAVE OFFSET ADJUSTMENT

POWER TRAIN

SHEAVE OFFSET ADJUSTMENT
1. Lift up the shroud.
2. Remove:
• Left side cover
3. Remove:
• Drive V-belt
4. Measure:
• Sheave offset a
NOTE:
Push the secondary sheave inward towards the
frame, and then measure the sheave offset.
5. Adjust:
• Sheave offset
Adjustment steps:
• Apply the brake to lock the secondary sheave.
• Remove the bolt (secondary sheave) 1,
washer 2 and secondary sheave 3.
• Adjust the sheave offset by adding or removing
shim(s) 4.
Adding shim → Offset is increased.
Removing shim → Offset is decreased.
2-25
INSP
Refer to "PRIMARY SHEAVE AND DRIVE V-
BELT" in CHAPTER 4.
Use a straightedge that is approximately
470 mm (18.5 in) long, 20 mm (0.79 in) wide,
and 4 mm (0.16 in) thick.
Out of specification → Adjust.
Sheave offset:
13.5 ~ 16.5 mm (0.53 ~ 0.65 in)
Shim size
Part number
90201-252F1 0.5 mm (0.02 in)
90201-25527 1.0 mm (0.04 in)
90201-25289 1.6 mm (0.06 in)
90201-25526 2.0 mm (0.08 in)
ADJ
Thickness