Yamaha WR250F Owner's Service Manual page 38

Part to be tightened
Air induction pipe
Air induction pipe clamp
Air cut-off valve assembly and bracket
Bracket (air cut-off valve) and frame
Crankcase
Crankcase bearing stopper
Crankcase bearing stopper (crankshaft)
Left crankcase cover
Idle gear cover (starter motor)
Idle gear plate
Right crankcase cover
Clutch cover
Crankcase oil drain bolt
△
Crankshaft end accessing screw
△
Timing mark accessing screw
Drive chain sprocket cover
Kick shaft ratchet wheel guide
Kickstarter crank
Primary drive gear
Clutch spring
Clutch boss
Clutch cable locknut
Push lever shaft
Drive sprocket
Drive axle oil seal stopper
Segment
Shift guide
Stopper lever
Shift pedal
CHASSIS
△
- marked portion shall be checked for torque tightening after break-in or before each race.
Part to be tightened
△
Upper bracket and outer tube
△
Lower bracket and outer tube
△
Upper bracket and steering stem
△
Handlebar upper holder and handlebar lower holder
△
Handlebar lower holder and upper bracket
△
Steering stem and steering ring nut
Front fork and front fork cap bolt
Front fork and base valve
Front fork cap bolt and damper rod
Front fork bleed screw and front fork cap bolt
TIGHTENING TORQUES
Thread size Q'ty
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M10 × 1.25
M32 × 1.5
M14 × 1.5
M6 × 1.0
M6 × 1.0
M8 × 1.25
M18 × 1.0
M6 × 1.0
M16 × 1.0
M8 × 1.25
M6 × 1.0
M18 × 1.0
M6 × 1.0
M8 × 1.25
M6 × 1.0
M6 × 1.0
M6 × 1.0
Thread size Q'ty
M8 × 1.25
M8 × 1.25
M24 × 1.0
M8 × 1.25
M10 × 1.25
M28 × 1.0
M51 × 1.5
M30 × 1.0
M12 × 1.25
M5 × 0.8
2-13
Tightening torque
Nm m•kg
1 10 1.0
1 4 0.4
2 10 1.0
2 7 0.7
11 12 1.2
11 10 1.0
4 14 1.4
8 10 1.0
3 10 1.0
2 10 1.0
6 10 1.0
7 10 1.0
1 20 2.0
1 — —
1 — —
2 8 0.8
2 12 1.2
1 33 3.3
1 75 7.5
5 10 1.0
1 60 6.0
2 7 0.7
1 10 1.0
1 75 7.5
2 10 1.0
1 30 3.0
2 10 1.0
1 10 1.0
1 12 1.2
Tightening torque
Nm m•kg
4 21 2.1
4 21 2.1
1 145 14.5
4 28 2.8
2 34 3.4
1 Refer to NOTE.
2 30 3.0
2 55 5.5
2 29 2.9
2 1 0.1
ft•lb
7.2
2.9
7.2
5.1
8.7
7.2
10
7.2
7.2
7.2
7.2
7.2
14
—
—
5.8
8.7
24
54
7.2
43
5.1
7.2
54
7.2
22
7.2
7.2
8.7
ft•lb
15
15
105
20
24
22
40
21
0.7