Yamaha RS90K Service Manual page 45

DRIVE V-BELT
2. Adjust the position of the V-belt by removing or
adding a spacer 1 on each adjusting bolt 2.
V-belt position
More than 1.5 mm
(0.06 in) above the
edge
From 1.5 mm (0.06 in)
above the edge to
–0.5 mm (–0.02 in)
below the edge
More than –0.5 mm
(–0.02 in) below the
edge
Part number
90201-061H1
90201-06037
3. Tighten:
• Adjusting bolt 2
Adjusting bolt:
10 Nm (1.0 m · kg, 7.2 ft · lb)
4. Inspect:
• Drive V-belt
Cracks/damage/wear → Replace.
Oil or grease on the V-belt → Check the pri-
mary and secondary sheaves.
5. Inspect:
• Primary sheave
• Secondary sheave
Oil or grease on the primary and secondary
sheaves → Use a rag soaked in lacquer thin-
ner or solvent to remove the oil or grease.
Check the primary and secondary sheaves.
2-28
INSP
ADJ
Adjustment
Remove a spacer
Not necessary
(It is correct.)
Add spacer
Thickness
0.5 mm (0.02 in)
1.0 mm (0.04 in)