Honda CRF450RL 2021 - Drive Chain Maintenance

Maintenance
2-47
DRIVE CHAIN
SLACK INSPECTION
Lift the drive chain at the position shown and measure
the distance from the upper surface of the swingarm.
Amputation hazard. Never inspect or adjust
the drive chain while the engine is running.
STANDARD: 55 – 60 mm (2 1/4 – 2 3/8 in)
SLACK ADJUSTMENT
If the chain needs adjustment, loosen the rear axle nut [1]
and drive chain adjuster lock nuts [2], then turn the
adjusting bolts [3].
Check that the adjusting block index marks [4] are in the
same position on each side, then tighten the rear axle nut
to the specified torque.
After torquing the axle nut, seat the adjusting bolts snugly
against the adjusting block and tighten the drive chain
adjuster lock nuts to the specified torque while holding
the adjusting bolts.
INSPECTION
Measure the drive chain plate [1].
If the measurement exceeds the service limit, replace the
drive chain 2-47.
TORQUE: 128 N·m (13.1 kgf·m, 94 lbf·ft)
TORQUE: 27 N·m (2.8 kgf·m, 20 lbf·ft)
[2]
[1]
[3]
[4]
[4]
SERVICE LIMIT: 13.3 mm (0.52 in)
[1]
13.3 mm (0.52 in)