Yamaha YZ450FX 2023, Owner'S Manual

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TIGHTENING TORQUES
2-12
Front wheel axle pinch bolt M8 4 21 N·m (2.1 kgf·m, 15 lb·ft) 
Front brake disc bolt M6 6 12 N·m (1.2 kgf·m, 8.9 lb·ft)
 /
Rear brake disc bolt M6 6 12 N·m (1.2 kgf·m, 8.9 lb·ft)
 /
Footrest bracket bolt M10 4 55 N·m (5.5 kgf·m, 41 lb·ft)
Sidestand bolt M10 1 35 N·m (3.5 kgf·m, 26 lb·ft)
Rear brake pedal bolt M8 1 26 N·m (2.6 kgf·m, 19 lb·ft) 
Rear brake pedal adjusting locknut M6 1 6 N·m (0.6 kgf·m, 4.4 lb·ft)
Rear brake master cylinder bolt M6 2 10 N·m (1.0 kgf·m, 7.4 lb·ft) 
Rear brake master cylinder reservoir
cap bolt
M4 2 1.5 N·m (0.15 kgf·m, 1.1 lb·ft)
Rear brake hose union bolt M10 2 30 N·m (3.0 kgf·m, 22 lb·ft) 
Rear brake caliper bleed screw M8 1 5 N·m (0.5 kgf·m, 3.7 lb·ft) 
Rear brake pad pin M10 1 17 N·m (1.7 kgf·m, 13 lb·ft)
Rear brake pad pin plug M10 1 2.5 N·m (0.25 kgf·m, 1.8 lb·ft)
Rear wheel axle nut M20 1 125 N·m (12.5 kgf·m, 92 lb·ft) 
Drive chain puller locknut M8 2 21 N·m (2.1 kgf·m, 15 lb·ft)
Rear wheel sprocket nut M8 6 50 N·m (5.0 kgf·m, 37 lb·ft) 
Nipple (spoke) — 72 2.5 N·m (0.25 kgf·m, 1.8 lb·ft) 
Bolt (rear brake disc cover) M6 2 10 N·m (1.0 kgf·m, 7.4 lb·ft) 
Rear brake caliper protector bolt M6 2 7 N·m (0.7 kgf·m, 5.2 lb·ft) 
Engine mounting bolt (upper side) M10 2 45 N·m (4.5 kgf·m, 33 lb·ft) 
Engine mounting nut (front side) M10 1 55 N·m (5.5 kgf·m, 41 lb·ft) 
Engine mounting nut (lower side) M10 1 53 N·m (5.3 kgf·m, 39 lb·ft) 
Engine bracket bolt (upper side) M8 4 34 N·m (3.4 kgf·m, 25 lb·ft) 
Engine bracket bolt (front side) M8 4 34 N·m (3.4 kgf·m, 25 lb·ft) 
Rear frame bolt M8 4 38 N·m (3.8 kgf·m, 28 lb·ft) 
Engine guard bolt M6 3 7 N·m (0.7 kgf·m, 5.2 lb·ft) 
Pivot shaft nut M16 1 85 N·m (8.5 kgf·m, 63 lb·ft) 
Rear shock absorber assembly
upper nut
M10 1 56 N·m (5.6 kgf·m, 41 lb·ft)

Rear shock absorber assembly
lower nut
M10 1 53 N·m (5.3 kgf·m, 39 lb·ft) 
Relay arm nut (swingarm side) M14 1 70 N·m (7.0 kgf·m, 52 lb·ft) 
Connecting arm nut (relay arm side) M14 1 80 N·m (8.0 kgf·m, 59 lb·ft) 
Connecting arm nut (frame side) M14 1 80 N·m (8.0 kgf·m, 59 lb·ft) 
Brake hose holder screw M5 4 3.5 N·m (0.35 kgf·m, 2.6 lb·ft) 
Drive chain tensioner bolt (upper
side)
M8 1 16 N·m (1.6 kgf·m, 12 lb·ft)
Item
Thread
size
Q’ty Tightening torques Remarks
LT
LT
LT
LT