Cut the old chain off by grinding the head off one of the pins.
Clamp a chain splitter onto the link with the ground down pin
Push the pin out
Remove the old chain.
Dont throw it away yet.
The new chain will be too long and needs to be cut to length.
To make sure the new chain is the right length, do not measure the old
chain, count the links.
The old chain will have stretched a fair bit with wear and if you measure it
you will almost certainly be at least one link, maybe two links too long on
the new chain.
Counting the links is the only way.
Check it and double check it.
Check it again.
Then cut the new chain to length.
See where the O rings sit inside the links.
Undo the nuts on the rear sprocket
New teeth compared to old teeth worn hooked teeth.
Give hub a good clean around the mounting face for the sprocket
Torque up the bolts correctly on the new sprocket
Remove the front sprocket cover and use a drift to lift the
security tab on the lock washer
Remove nut and lock washer
Slide off old sprocket
New sprocket compared to old, slightly alarmingly worn sprocket.
The Triumph OEM sprocket has a thick rubber wall on both sides of it.
Aftermarket ones do not. This one is a Renthal sprocket.
Apparently Triumph say this is for sound insulation, but I have more than
one bike, both with and without OEM sprockets and if there is a difference in
noise levels, Im buggered if I can detect it.
Ill stick with Renthal sprockets.
The nut has a shouldered recess that sits over the splines on the
Torque up the nut on the new sprocket
Then use a drift to flatten the lock washer hard onto one side of the nut.
This washer should really be replaced with the sprocket, but if you make
sure that you use the opposite side to the washer than was bent over
previously, you can safely get two uses out of it.
Shorten the chain run by undoing the hub clamp bolt and rotating the
concentric hub forwards.
Feed the new chain through the chain run and hook the two ends up on the
Fill the link sleeves with the supplied grease and push the joining link into
place .aking sure all four O rings are seated correctly