Yamaha YZ450FX 2021 Owner's Service Manual page 177

Installed depth "a"
4.25 mm (0.17 in)
5. Lubricate:
• Connecting arm and frame bolt
• Relay arm and connecting arm bolt
• Relay arm and swingarm bolt
(circumference and threaded portion)
• Rear shock absorber assembly upper bolt
• Rear shock absorber assembly lower bolt
Recommended lubricant
Molybdenum disulfide grease
6. Install:
• Rear shock absorber assembly
TIP
• When installing the rear shock absorber as-
sembly, lift up the swingarm.
• Install the rear shock absorber assembly upper
bolt, and connecting arm bolt (frame side) from
the right.
• Install the rear shock absorber assembly lower
bolts, connecting arm bolt (relay arm side), and
relay arm bolt (swingarm side) from the left.
7. Tighten:
• Rear shock absorber assembly upper nut
Rear shock absorber assembly
upper nut
56 N·m (5.6 kgf·m, 41 lb·ft)
• Connecting arm nut (frame side)
Connecting arm nut (frame side)
80 N·m (8.0 kgf·m, 59 lb·ft)
• Connecting arm nut (relay arm side)
Connecting arm nut (relay arm
side)
80 N·m (8.0 kgf·m, 59 lb·ft)
• Relay arm nut (swingarm side)
REAR SHOCK ABSORBER ASSEMBLY
• Rear shock absorber assembly lower nut
4-63
Relay arm nut (swingarm side)
70 N·m (7.0 kgf·m, 52 lb·ft)
Rear shock absorber assembly
lower nut
53 N·m (5.3 kgf·m, 39 lb·ft)