MAINTENANCE
135
Drive Chain and Sprocket Wear
Inspection
Warning
Never neglect drive chain maintenance
and always have drive chains installed
by an authorized Triumph dealer.
Use a genuine Triumph supplied drive
chain as specified in the Triumph Parts
Catalog.
The use of non-approved drive chains
may result in a broken drive chain or
may cause the drive chain to jump off
the sprockets leading to loss of
motorcycle control or an accident.
Caution
If the sprockets are found to be worn,
always replace the sprockets and drive
chain together.
Replacing worn sprockets without also
replacing the drive chain will lead to
premature wear of the new sprockets.
1. Measure across 20 links
2. Weight
To inspect the drive chain and sprocket
wear:
▼ Remove the chain guard.
▼ Stretch the chain taut by hanging a
20 - 40 lb (10 - 20 kg) weight on the
chain.
▼ Measure the length of 20links on the
straight part of the chain from pin
center of the 1stpin to the pin center
of the 21st pin. Since the chain may
wear unevenly, take measurements
in several places.
▼ If the length exceeds the maximum
service limit of 12.56 in (319 mm), the
chain must be replaced.
▼ Rotate the rear wheel and inspect
the drive chain for damaged rollers,
and loose pins and links.
▼ Also inspect the sprockets for
unevenly or excessively worn or
damaged teeth.
Worn Tooth
(Engine Sprocket)
Worn Tooth
(Rear Sprocket)
(Sprocket wear exaggerated for
illustrative purposes)
▼ If there is any irregularity, have the
drive chain and/or the sprockets
replaced by an authorized Triumph
dealer.
▼ Reinstall the chain guard, tightening
the fixings to 53lbfin (6Nm).
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