Yamaha BR250F Service Manual page 141

Model
Secondary Sheave Spring:
Part No.
Color Code
Outside Dia. x Wire Dia.
Twist Angle
Hole Position (Sheave Side)
*
(Spring Seat Side)**
8R250T J
90580-40080
None
50
x
4.0 mm (1.968
x
0.157 in)
160
0
*
Spring Rate
No. of Coils
Free Length
Color Code
Torque Cam Angle
Drive Chain:
Type
No. of Links
Free Play
Optional Sprocket:
Drive Sprocket
Driven Sprocket
Track:
Part No.
Width x Length
Pitch
x
No. of Links
Thickness
/I
A"
Height "8"
o
o
**
183 kq-rnrn/deq (15.9 lb-in/deq)
9.9
105 mm (4.13 in)
#40-1
44
8'"'" 15 mm (0.32'"'" 0.59 in)
11,12,13,14
21,22,23,24
8XO-47110-00
381 x 3,456 mm (15.0 x 136.1 in)
64 mm (2.52 in)
x
54
5.5 mm (0.22 in)
15.5 mm (0.61 in)
Deflection at 10 kg (22 lb)
-28-
40 -- 50 mm (1.57 -. 1.97 in)