Yamaha YZ450F 2021 - Page 60

TIGHTENING TORQUES
2-15
TIP
Lower ring nut
1. First, tighten the lower ring nut approximately 38 N·m (3.8 kgf·m, 28 lb·ft) by using the steering nut
wrench, then loosen the lower ring nut one turn.
2. Retighten the lower ring nut 7 N·m (0.7 kgf·m, 5.2 lb·ft).
Bolt (drive chain support) M6 1 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Drive chain support nut M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Drive chain guide bolt M5 3 4.0 N·m (0.40 kgf·m, 3.0 lb·ft)
Bolt (rear frame cover) (left) M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft) 
Fuel tank bolt (front side) M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft) 
Fuel tank bolt (rear side) M6 1 9 N·m (0.9 kgf·m, 6.6 lb·ft)
Fuel tank bracket bolt M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Fuel pump bolt M5 6 4.0 N·m (0.40 kgf·m, 3.0 lb·ft) 
Screw (fuel inlet pipe) M5 2 3.5 N·m (0.35 kgf·m, 2.6 lb·ft)
Bolt (fuel tank cap cover) M6 2 4.0 N·m (0.40 kgf·m, 3.0 lb·ft)
Seat set bracket screw M6 1 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Seat bolt M8 2 22 N·m (2.2 kgf·m, 16 lb·ft) 
Side cover bolt (left) M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft) 
Side cover bolt (right) M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft) 
Air scoop bolt (frame) M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft) 
Air scoop bolt (fuel tank) M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft) 
Air scoop bolt (radiator guard) M6 4 7 N·m (0.7 kgf·m, 5.2 lb·ft) 
Front fender bolt M6 4 10 N·m (1.0 kgf·m, 7.4 lb·ft) 
Rear fender bolt (front side) M6 4 7 N·m (0.7 kgf·m, 5.2 lb·ft) 
Rear fender bolt (rear side) M6 2 16 N·m (1.6 kgf·m, 12 lb·ft) 
Screw (mud flap) — 2 1.3 N·m (0.13 kgf·m, 0.95 lb·ft) 
Number plate bolt M6 1 7 N·m (0.7 kgf·m, 5.2 lb·ft) 
Frame ground bolt (negative battery
lead)
M5 1 7 N·m (0.7 kgf·m, 5.2 lb·ft)
Item
Thread
size
Q’ty Tightening torques Remarks