2-12 PERIODIC MAINTENANCE
Periodic Maintenance Procedures
Tighten both chain adjuster locknuts.
Tighten the axle nut.
Tightening Torque - Rear Axle Nut: 64 N
Rotate the wheel, measure the chain slack again at the tightest
position, and readjust if necessary.
Insert a new cotter pin for the axle nut and spread its ends.
Tighten the rear torque link nut securely.
Tightening Torque - Rear Torque Link Nut: 25 N
Insert a new cotter pin for the rear torque link nut and spread its ends.
If the axle and torque link nuts are not securely tightened and
the cotter pins are not installed, an unsafe riding condition
Check the rear brake play referring to brakes section in this chapter.
Chain Wear Inspection
Rotate the rear wheel to inspect the drive chain for damaged rollers,
and loose pins and links.
Also inspect the sprockets for unevenly or excessively worn teeth,
and damaged teeth.
Sprocket wear is exaggerated for illustration (see Sprocket Wear
Inspection in this chapter).
If there is any irregularity, replace the drive chain and sprockets.
If the chain appears dry, lubricate it.
Remove the chain cover.
Stretch the chain taut by hanging a 98 N (10 kg, 20 lb) weight [A] on
Measure the length of 20 links [B] on the straight part [C] of the chain
from pin center of the 1st pin to pin center of the 21st pin. Since the
chain may wear unevenly, take measurements at several places.
If any measurements exceeds the service limit, replace the chain.
Also, replace the engine and rear sprockets when the drive chain is
If the drive chain wear exceeds the service limit, replace the
chain or an unsafe riding condition may result.
that breaks or jumps off the sprockets could snag on the
engine sprocket or lock the rear wheel, severely damaging the
motorcycle and causing it to go out of control. For safety, use
only the standard chain.
Drive Chain 20–Link Length
m (6.5 kgf
m, 47 ft
m (2.5 kgf