Yamaha WR250F(W) Owner's Service Manual page 103

Part to be tightened
Spark plug
Camshaft cap
Cylinder head blind plug screw
Cylinder head (stud bolt)
(stud bolt)
(bolt)
(nut)
Cylinder head cover
Cylinder
Balancer weight
Balancer shaft driven gear
Timing chain guide (intake side)
Timing chain tensioner
Timing chain tensioner cap bolt
Impeller
Radiator hose clamp
Coolant drain bolt
Water pump housing
Radiator stay
Radiator
Radiator pipe
Oil pump cover
Oil pump
Oil filter element drain bolt
Oil filter element cover
Oil strainer (crankcase)
Oil delivery pipe 1(M10)
(M8)
Oil hose
Oil hose clamp
Oil strainer (oil tank)
Oil tank drain bolt
Oil tank (upper)
Oil tank and frame
Oil pressure check bolt
Carburetor joint
Carburetor joint clamp
Air filter joint clamp
Throttle cable adjust bolt and locknut
Throttle cable (pull)
Throttle cable (return)
Throttle cable cover
Hot starter plunger
MAINTENANCE SPECIFICATIONS
Thread size
M10S × 1.0
M6 × 1.0
M12 × 1.0
M6 × 1.0
M8 × 1.25
M9 × 1.25
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M14 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M8 × 1.25
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M4 × 0.7
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M10 × 1.25
M8 × 1.25
M6 × 1.0
M6 × 1.0
M8 × 1.25
M6 × 1.0
M6 × 1.0
M6 × 1.0
M6 × 1.0
M4 × 0.7
M6 × 1.0
M6 × 0.75
M6 × 1.0
M12 × 1.0
M5 × 0.8
M12 × 1.0
2 - 10
Q'ty
Nm
1 13
10 10
1 28
2
1 15
4 38
2 10
2 10
1 10
2 10
1 50
2 10
2 10
1
1 14
10
1 10
4 10
6 10
4 10
1 10
1
3 10
1 10
2 10
2 10
1 20
2 18
2
— 2
1
1 18
1
3
1 10
2 10
1
1
1
1
1 11
2
1
SPEC
Tightening torque
m·kg ft·lb
1.3 9.4
1.0 7.2
2.8 20
7 0.7 5.1
1.5 11
3.8 27
1.0 7.2
1.0 7.2
1.0 7.2
1.0 7.2
5.0 36
1.0 7.2
1.0 7.2
7 0.7 5.1
1.4 10
2 0.2 1.4
1.0 7.2
1.0 7.2
1.0 7.2
1.0 7.2
1.0 7.2
2 0.2 1.4
1.0 7.2
1.0 7.2
1.0 7.2
1.0 7.2
2.0 14
1.8 13
8 0.8 5.8
2 0.2 1.4
9 0.9 6.5
1.8 13
7 0.7 5.1
9 0.9 6.5
1.0 7.2
1.0 7.2
3 0.3 2.2
3 0.3 2.2
4 0.4 2.9
4 0.4 2.9
1.1 8.0
4 0.4 2.9
2 0.2 1.4