Yamaha BR250F Service Manual page 83

Part to be tightened Thread size Tightening torque Remarks
Oil pump gear case
M6 P1.0
0.7 m-kg (5.1 ft-Ib)
[Drive and track suspension]
Primary sliding sheave and cap M6 P1.0
1.1 m-kg (8 ft-lb)
Installation of primary sheave
UNF 1/2"
Initial: 10 m-kg (72.5 ft-lb) Use motor oil
Loosen once and retighten:
6.0 m-kg (43.5 ft-Ib)
Installation of secondary sheave M12 P1.25 4.0 m-kq (29 ft-lb]
Installation of drive chain sprocket
M12 P1.25 6.0 m-kg (43.5 ft-Ib) Use cotter pin
Installation of driven chain sprocket M8 P1.25
2.3 m-kg (16.5 ft-lb]
Chain housing and frame
M8
P1.25
2.3 m-kg (16.5 ft-Ib)
Chain hosing cap M6 P1.0 0.65 m-kg (5 ft-lb)
Chain tensioner lock nut
M10 P1.25
3.3 m-kg (24 ft-lb)
Installation of front axle
L.H.
M20 P1.0 8.0 m-kg (58 ft-lb)
Front axle housing and frame
M8 P1.25 2.3 m-kg (16.5 ft-Ib)
Shaft 1 and frame
M10 P1.25 5.5 m-kg (40 ft-lb]
Pivot arm 1 and sliding frame 1
M10 P1.25
5.0 m-kg (36 tt-lb)
Use Loctite®
Suspension wheel M12 P1.25 7.3 m-kg (53 ft-lbl
Spring hook
M8 P1.0
2.3 m-kg (16.5 ft-lb}
Sliding frame 1 M8 P1.25 2.3 m-kg (16.5 ft-Ib)
Rear guide wheel
M8 P1.25
2.3 m-kg (16.5 ft-lb)
SIiding runner 1 M6 P1.0 0.25 m-kg (2 ft-lb)
Use Loctite®
Sliding runner 2
M6 P1.0
0.65 m-kg (5 ft-lb]
Stopper 1 M6 P1.0 0.4 m-kg (3 ft-lb)
[Chassis]
Engine mounting bolt
M10 P1.25 3.0 m-kg (22 ft-lb)
Ski runner M8 P1.25 1.4 m-kg (10 ft-lb)
Steering column and gate
M8 P1.25 2.0 m-kg (14.5 ft-lb)
Use lock
washer
Steering relay rod adjusting nut M10 P1.25 2.5 m-kg (18 ft-lb]
Use Loctite®
Outside arm and ski colume
M10 P1.25
3.0 m-kg (22 ft-lb]
Use lock
washer
Steering lower bracket
M8 P1.25 2.0 m-kg (15 ft-Ib) Use lock
washer
Installation of steering column 1,2
M8 P1.25
1.45 rn-kq (10.5 ft-lb)
Steering relay ass'y M10 P1.25
3.0 m-kg (22 ft-lbl
Universal joint and outside arm
M10 P1.25
2.5 m-kg (18 ft-lb)
7-5