Yamaha WR250F(P) Owner's Service Manual page 86

Part to be tightened
Silencer
Silencer clamp
Spark arrester (for USA)
Silencer end pipe (for USA)
Crankcase
Crankcase bearing stopper
Crankcase bearing stopper (crankshaft)
Left crankcase cover
Right crankcase cover
Clutch cover
Crankcase oil drain bolt
Drive chain sprocket cover
Kick shaft ratchet wheel guide
Kickstarter crank
Primary drive gear
Clutch spring
Clutch boss
Push lever shaft
Drive sprocket
Drive axle oil seal stopper
Segment
Shift guide
Stopper lever
NOTE:
- marked portion shall be checked for torque tightening after break-in or before each race.
MAINTENANCE SPECIFICATIONS
Thread size
2 - 11
Q'ty
M8 × 1.25
2
M8 × 1.25
1
M6 × 1.0
3
M6 × 1.0
1
M6 × 1.0
11
M6 × 1.0
11
M6 × 1.0
4
M6 × 1.0
8
M6 × 1.0
8
M6 × 1.0
7
M10 × 1.25
1
M6 × 1.0
2
M6 × 1.0
2
M8 × 1.25
1
M18 × 1.0
1
M6 × 1.0
5
M16 × 1.0
1
M6 × 1.0
1
M18 × 1.0
1
M6 × 1.0
2
M8 × 1.25
1
M6 × 1.0
2
M6 × 1.0
1
SPEC
Tightening torque
Nm m·kg ft·lb
35 3.5 25
20 2.0 14
10 1.0 7.2
10 1.0 7.2
12 1.2 8.7
10 1.0 7.2
10 1.0 7.2
10 1.0 7.2
10 1.0 7.2
10 1.0 7.2
20 2.0 14
8 0.8 5.8
12 1.2 8.7
33 3.3 24
75 7.5 54
8 0.8 5.8
60 6.0 43
10 1.0 7.2
75 7.5 54
10 1.0 7.2
30 3.0 22
10 1.0 7.2
10 1.0 7.2