Changing Clutch Engagement And Shift Rpm; V-Belt; Removal; Inspection - Yamaha BR250F Service Manual

B. Changing Clutch Engagement and Shift RPM
~
Clutch engagement
r.p.m.
Clutch shifting r.p.m,
Decrease Increase Decrease Increase
Centrifugal force of rollers Add shims Remove shims Add shims Remove shims
Torsion spring
-
-
Decrease Increase
Secondary spring
constant
Twist angle
- -
Smaller wind Greater wind
1. New: 31.5 mm (1.24 in) 2. Wear limit: 26 mm (1.02 in)
Length of V -Belt
1,099 mm (42.8 in)
Part No.
820-17641-00
3. Measu re the length of the V-belt. It
should be within specification; if not,
replace the belt.
Wear limit: 26 mm (1.02 in)
4-3. V-BELT
A. Removal
1. Turn the secondary sliding sheave clock-
wise and push it towards the cha in case.
2. While holding the sliding sheave in this
compressed position, remove the V-belt
from the secondary sheave then from the
primary.
B. Inspection
1. Visually inspect the V-belt for signs of
damage. Replace the belt if it is
damaged.
2. Measure the width of the V-belt. If the
belt is worn beyond the wear limit,
replace it.
1. V-belt length
4-3