Yamaha yz250 2015, Owner'S Manual

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2-8
TIGHTENING TORQUES
TIGHTENING TORQUES
ENGINE
△
- marked portion shall be checked for torque tightening after break-in or before each race.
Item
Thread
size
Q'ty Tightening torque Remarks
Spark plug M14S 1 20 Nm (2.0 m•kg, 14 ft•lb)
Cylinder head (nut) M8 6 25 Nm (2.5 m•kg, 18 ft•lb)
Copper
washer
Cylinder head (stud) M8 6 13 Nm (1.3 m•kg, 9.4 ft•lb)
Cylinder (nut) M10 4 42 Nm (4.2 m•kg, 30 ft•lb)
Cylinder (stud) M10 4 13 Nm (1.3 m•kg, 9.4 ft•lb)
Power valve:
Holder M5 2 6 Nm (0.6 m•kg, 4.3 ft•lb)
YPVS
Link rod M5 2 6 Nm (0.6 m•kg, 4.3 ft•lb) YPVS
Push rod M5 1 5 Nm (0.5 m•kg, 3.6 ft•lb) YPVS
Thrust plate M5 1 6 Nm (0.6 m•kg, 4.3 ft•lb) YPVS
Side holder M5 4 4 Nm (0.4 m•kg, 2.9 ft•lb) YPVS
Link lever M4 1 4 Nm (0.4 m•kg, 2.9 ft•lb) YPVS
Pulley M4 2 4 Nm (0.4 m•kg, 2.9 ft•lb) YPVS
Cover M5 4 4 Nm (0.4 m•kg, 2.9 ft•lb) YPVS
Governor fork M4 2 5 Nm (0.5 m•kg, 3.6 ft•lb) YPVS
Housing M5 4 5 Nm (0.5 m•kg, 3.6 ft•lb) YPVS
Impeller M8 1 14 Nm (1.4 m•kg, 10 ft•lb)
Water pump housing cover M6 4 10 Nm (1.0 m•kg, 7.2 ft•lb)
Coolant drain bolt M6 1 10 Nm (1.0 m•kg, 7.2 ft•lb)
Copper
washer
Radiator M6 6 10 Nm (1.0 m•kg, 7.2 ft•lb)
Radiator guard M6 2 10 Nm (1.0 m•kg, 7.2 ft•lb)
Radiator hose clamp M6 8 2 Nm (0.2 m•kg, 1.4 ft•lb)
Air filter element M6 1 2 Nm (0.2 m•kg, 1.4 ft•lb)
Carburetor joint M6 5 10 Nm (1.0 m•kg, 7.2 ft•lb)
△
Air filter case M6 2 8 Nm (0.8 m•kg, 5.8 ft•lb)
Air filter guide clamp M5 1 4 Nm (0.4 m•kg, 2.9 ft•lb)
Reed valve M3 4 1 Nm (0.1 m•kg, 0.7 ft•lb)
Throttle cable adjust bolt and locknut M8 1 7 Nm (0.7 m•kg, 5.1 ft•lb)
Throttle cable M6 1 4 Nm (0.4 m•kg, 2.9 ft•lb)
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Exhaust pipe (front) M6 1 14 Nm (1.4 m•kg, 10 ft•lb)
△
Exhaust pipe (rear) M6 1 12 Nm (1.2 m•kg, 8.7 ft•lb)
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Exhaust pipe stay (front) M8 1 25 Nm (2.5 m•kg, 18 ft•lb)
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Exhaust pipe stay (rear) M6 1 12 Nm (1.2 m•kg, 8.7 ft•lb)
Silencer:
△
Silencer and frame M6 1 12 Nm (1.2 m•kg, 8.7 ft•lb)
Fiber M6 4 10 Nm (1.0 m•kg, 7.2 ft•lb)
Crankcase M6 11 14 Nm (1.4 m•kg, 10 ft•lb)
Left crankcase cover M6 5 5 Nm (0.5 m•kg, 3.6 ft•lb)