Honda NX4 Falcon Manual Del Propietário página 139

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If the drive chain requires adjustment, the procedure is
as follows:
1. Place the motorcycle on its side stand with the
transmission in neutral and the ignition switch off.
2. Loosen the rear axle nut (1).
3. Loosen the lock nuts (2) on both adjusting bolts.
4. Turn both adjusting nuts (3) an equal number of
turns until the correct drive chain slack is obtained.
Turn the adjusting nuts clockwise to tighten the
chain, or counterclockwise to provide more slack.
Adjust the chain slack at a point midway between
the drive sprocket and the rear wheel sprocket. Roll
the motorcycle forward. Stop and place it on its side
stand. Recheck slack at other sections of the chain.
Chain slack should be:
35 – 45 mm (1.4 – 1.8 in)
5. Check rear axle alignment by confirming the chain
adjuster index marks (4) against the rear edge (5) of
the adjusting slots.
Both left and right marks should correspond. If the
axle is misaligned, turn the right or left adjusting nut
until the marks correspond on the rear edge of the
adjusting slots and recheck chain slack.
6. Tighten the rear axle nut to:
88 N·m (9.0 kgf·m, 65 lbf·ft)
If a torque wrench is not used for this installation, see
your Honda dealer as soon as possible to verify proper
assembly.
7. Tighten the drive chain adjusting nuts lightly, then
tighten the lock nuts by holding the adjusting nuts
with a spanner.
8. Recheck drive chain slack.
Owner´s Manual