Yamaha WR250FM 2021, Owner'S Service Manual

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TIGHTENING TORQUES
2-11
EAM30203
ENGINE TIGHTENING TORQUES
TIP
 - marked portion shall be checked for torque tightening after break-in or before each race.
Item
Thread
size
Q’ty Tightening torques Remarks
Camshaft cap bolt M6 8 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Spark plug M10 1 13 N·m (1.3 kgf·m, 9.6 lb·ft)
Cylinder head stud bolt (exhaust
pipe)
M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Oil passage plug (cylinder head) M6 1 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Cylinder head bolt M9 4 See TIP.
Cylinder head nut M6 2 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Cylinder head cover bolt M6 2 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Stud bolt (cylinder head cover) M6 1 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Cylinder bolt M6 1 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Oil pressure check bolt M6 1 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Balancer weight plate screw M6 2 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Balancer weight gear nut M14 1 50 N·m (5.0 kgf·m, 37 lb·ft)
Balancer nut M10 1 38 N·m (3.8 kgf·m, 28 lb·ft)
Timing chain guide stopper plate
(exhaust side)
M6 1 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Timing chain tensioner cap bolt M6 1 6 N·m (0.6 kgf·m, 4.4 lb·ft)
Timing chain tensioner bolt M6 2 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Coolant drain bolt M6 1 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Radiator hose clamp screw M6 8 1.5 N·m (0.15 kgf·m, 1.1 lb·ft)
Radiator bolt M6 4 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Radiator pipe joint bolt M6 1 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Radiator fan bolt M6 3 8 N·m (0.8 kgf·m, 5.9 lb·ft)
Water pump housing cover bolt M6 4 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Water pump impeller M8 1 14 N·m (1.4 kgf·m, 10 lb·ft)
Oil pump bolt M5 2 5 N·m (0.5 kgf·m, 3.7 lb·ft)
Oil pump cover screw M4 1 2.0 N·m (0.20 kgf·m, 1.5 lb·ft)
Oil strainer bolt M6 1 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Throttle cable cover bolt M5 1 3.5 N·m (0.35 kgf·m, 2.6 lb·ft)
Throttle body joint bolt M6 2 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Throttle body joint clamp screw M5 1 3.0 N·m (0.30 kgf·m, 2.2 lb·ft)
Air filter case joint clamp screw M5 1 3.0 N·m (0.30 kgf·m, 2.2 lb·ft)
Air filter case bolt M6 3 7 N·m (0.7 kgf·m, 5.2 lb·ft)
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