Piston Rings - Assembly - Triumph Scrambler 1200 XC Service Manual

3. When checking the piston ring end gap, always refer to the specifications table
(see Piston).
Note
If the end gap is too large, replace the piston rings with a new set.
If the gap remains too large with new piston rings, both the pistons and barrels
must be replaced.
If the gap is too small, check the cylinder bore for distortion, replacing as
necessary.
Do not file the piston rings.
4. Repeat the procedure for the remaining piston rings.

Piston Rings - Assembly

1. Ensure the piston ring grooves are clean.
Note
Ensure all piston rings are fitted in their original locations (if original rings are
being reused) or to the piston/bore which the end gaps were checked (if new
rings are being fitted).
Do not expand the piston rings any more than is necessary to allow them to be
installed on the piston. The rings are brittle and will break if expanded too much.
2. Fit the oil control ring expander to the piston then install the upper and lower
control rings (the oil control rings are both the same and can be fitted either way
up).
3. Fit the second compression ring carefully to the piston, ensuring its 2T mark is
facing upwards.
4. Fit the top compression ring to the piston ensuring its 1T mark is facing upwards.
Note
Ensure the second and top compression rings are correctly installed.
The second and top compression rings are different and are not
interchangeable.
The top ring can be identified by the chamfer on its upper inside edge.
The second ring has no chamfer.
Service Manual - Scrambler 1200 XC
T908.04.03
1. Checking piston ring end gap
CAUTION
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