Engagement Speed Check - Yamaha RS90K Service Manual

DRIVE V-BELT/ENGAGEMENT SPEED CHECK
6. Measure:
• Drive V-belt circumference a
Out of specification → Replace.
V-belt circumference:
1,129 ~ 1,137 mm (44.4 ~ 44.8 in)

ENGAGEMENT SPEED CHECK

1. Place the machine on a level surface of hard-
packed snow.
2. Inspect:
• Clutch engagement speed
Inspection steps:
• Start the engine, and open the throttle lever
gradually.
• Check the engine speed when the machine
starts moving forward.
Out of specification → Adjust the primary
sheave.
Engagement speed:
RS90/RS90R:
3,300 ~ 3,700 r/min
RSG90:
3,400 ~ 3,800 r/min
RS90M:
3,800 ~ 4,200 r/min
RST90 "For USA/Canada":
3,000 ~ 3,400 r/min
RST90 "For Europe"/RST90TF:
2,800 ~ 3,200 r/min
2-29
INSP
ADJ