Yamaha BR250F Service Manual page 121

NOTE: _
Securely fit the projections of the Adapter
into the fixed sheave holes.
f. Remove the spider, sliding sheave and
fixed sheave from the Clutch Spider
Separator.
g. Remove the sliding sheave bush from the
sliding sheave with Bushing Tool (special
tool) as shown.
1. Bushing Tool (special tool) 2.
Bush
1. Supporting plate
d. Set the upper piece of the Clutch Spider
Separator onto the spider as shown.
e. Remove the fixed sheave and fixed
sheave stopper by turning the Clutch
Separator counterclockwise.
Inspection
1. Inspect the tapered ends of the crank-
shaft and fixed sheave for scratches.
If either is severely scratched, replace it.
If scratches are minor, burnish the
component with emery cloth.
2. Check the primary sheave cap bush and
sliding sheave bush for wear. If worn
beyond tolerance, replace the bush.
--------
Primary sheave cap Sliding sheave
Bush clearance
0.25 mm (0.01 in)
0.25 mm (0.01 in)
<Limit>
To loosen the fixed sheave, high torque is
required. Therefore, make sure the primary
sheave and special tools are placed securely
also take care not to crack the fixed sheave.
8-
1. Feeler gauge 2. Primary sheave cap