Yamaha MX250 - Tightening Torques and Torque Guidelines

7-8
1
2
3
4
5
6
7
8
9
10
SPECIFICATIONS
TIGHTENING TORQUES
TIGHTENING TORQUES
Item Thread size Tightening torque
Air filter cover nut M6  1.0 1.6 N·m (0.16 kgf·m, 1.2 lb·ft)
Air filter element nut M6  1.0 0.9 N·m (0.09 kgf·m, 0.66 lb·ft)
Duct bolt M6  1.0 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Duct nut M8  1.25 9 N·m (0.9 kgf·m, 6.6 lb·ft)
Fuel tank bolt M6  1.0 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Fuel tank stay bolt M8  1.25 29 N·m (2.9 kgf·m, 21 lb·ft)
Fuel cock M10  1.25 6 N·m (0.6 kgf·m, 4.4 lb·ft)
Fuel cock screw — 0.8 N·m (0.08 kgf·m, 0.59 lb·ft)
Strainer cup — 1.3 N·m (0.13 kgf·m, 0.95 lb·ft)
Muffler bolt M8  1.25 20 N·m (2.0 kgf·m, 15 lb·ft)
Muffler nut M8  1.25 20 N·m (2.0 kgf·m, 15 lb·ft)
Muffler cover bolt M6  1.0 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Spark arrester screw — 1.8 N·m (0.18 kgf·m, 1.3 lb·ft)
Recoil starter bolt M6  1.0 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Drive plate screw M6  1.0 5.4 N·m (0.54 kgf·m, 3.9 lb·ft)
Flywheel cover bolt M6  1.0 7 N·m (0.7 kgf·m, 5.2 lb·ft)
TCI unit bolt M6  1.0 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Flywheel nut M18  1.5 100 N·m (10 kgf·m, 74 lb·ft)
Governor arm bolt M6  1.0 8 N·m (0.8 kgf·m, 5.9 lb·ft)
Throttle lever assembly bolt M6  1.0 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Throttle lever assembly plate
screw
M5  0.8 1.1 N·m (0.11 kgf·m, 0.81 lb·ft)
Throttle lever assembly wire screw M4  0.7 1.1 N·m (0.11 kgf·m, 0.81 lb·ft)
Oil warning unit bolt M6  1.0 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Engine switch screw M6  1.0 4.5 N·m (0.45 kgf·m, 3.3 lb·ft)
Spark plug M14  1.25 20 N·m (2.0 kgf·m, 15 lb·ft)
Cylinder head cover bolt M6  1.0 11 N·m (1.1 kgf·m, 8.1 lb·ft)
Valve adjuster locknut M5  0.5 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Rocker arm shaft screw M5  0.8 2.3 N·m (0.23 kgf·m, 1.7 lb·ft)
Cylinder head bolt M10  1.25
1st: 12 N·m (1.2 kgf·m, 8.9 lb·ft)
2nd: 50 N·m (5.0 kgf·m, 37 lb·ft)
Exhaust stud bolt M8  1.25 11 N·m (1.1 kgf·m, 8.1 lb·ft)
Crankcase cover bolt M8  1.25
1st: 12 N·m (1.2 kgf·m, 8.9 lb·ft)
2nd: 30 N·m (3.0 kgf·m, 22 lb·ft)
Oil level switch bolt M6  1.0 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Oil level switch clamp bolt M6  1.0 10 N·m (1.0 kgf·m, 7.4 lb·ft)
Oil drain bolt M12  1.5 27 N·m (2.7 kgf·m, 20 lb·ft)
Connecting rod cap bolt M8  1.25 20 N·m (2.0 kgf·m, 15 lb·ft)
Float chamber bolt — 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Carburetor drain screw — 1.3 N·m (0.13 kgf·m, 0.95 lb·ft)