Yamaha BR250F Service Manual page 119

POWER TRAIN
PRIMARY SHEAVE
The bolt head must be inserted
as shown.
Bushing clearance:
0.25
mm
(0.01
in)
Apply to bottom
four threads or
thread-locking
compound such
as "LOCT I TE #640
with PRIMER Tn.
Belt width:
New: 31.6 mm (1.24 in)
Wear limit:
28
mm
(1.10
in)
.....
~
Oiling Point
--Siiiiiil
Greasing point
..... X
No oiling or greasing is allowed
-6
Be sure the "X" on the sheave cap
aligns with
"X"
on the spider.
Bushing clearance:
0.25 mm (0.01 in)
Use molybdenum sprays
liberally on the weights.
1. Spider
2.
Plain washer
3. Roller
4.
Bushing
5. Primary sheave cap
6.
Fixed sheave
7. Fi xed sheave stopper
8.
V-belt
9. Sliding sheave
10.
Slider
11. Bush
12.
Plain washer
13. Weight