77
Maintenance and Adjustment
Chain Wear Inspection
1. Measure across 20 links
2. Weight
• Remove the chain guard.
• Stretch the chain taut by hanging a
20-40lb (10-20kg) weight on
the chain.
• Measure the length of 20 links on
the straight part of the chain from
pin center of the 1
st
pin to the center
of the 21
st
pin. Since the chain may
wear unevenly, take measurements
at several places.
• If the length exceeds the maximum
service limit of 12.63 in (321 mm),
the chain must be replaced.
• Rotate the rear wheel and inspect
the drive chain for damaged rollers,
and loose pins and links.
• Also remove the sprocket cover and
inspect the sprockets for unevenly or
excessively worn or damaged teeth.
• If there is any irregularity, have the
drive chain and sprockets replaced
by an authorized Triumph dealer.
• Install the chain guard and sprocket
cover.
The use of non-approved chains may result
in a broken chain or may cause the chain
to jump off the sprockets. Either condition
could lock the rear wheel, severely
damaging the motorcycle and causing loss
of control and an accident.
For safety, use a genuine Triumph supplied
chain as specified in the Triumph parts
catalog.
Never neglect chain maintenance and
always have chains installed by an
authorized Triumph dealer.
T509--33
WORN TOOTH
(ENGINE SPROCKET)
WORN TOOTH
(REAR SPROCKET)
Sprocket Wear Is Shown Exaggerated
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