Triumph Rocket III Classic Service Manual page 131

The second ring upper surface is marked '2N' but is
plain on the inside edge and has a bronze
appearance.
All oil control rings can be fitted with either face
upward.
Piston Ring Identification Marks
2. Install a new circlip to one side of the piston.
3. Locate the piston to the connecting rod ensuring that
the piston direction arrow points to the right hand
(exhaust> side of the engine.
1.
Piston
2. Direction arrow
4. Align the small end in the connecting rod with the
gudgeon pin hole in the piston.
5. Lubricate the piston, small end and gudgeon pin
with clean engine oil and fit the gudgeon pin from
the opposite side to the installed circlip.
6. Fit a new circlip to the remaining location in the
piston then check that both are correctly installed.
Rectify if necessary.
Crankshaft
Re-using the original circlips may cause gudgeon pin
detachment resulting in engine seizure, loss of
motorcycle control and an accident.
Z The piston ring gaps must be arranged as shown in
the diagram below.
FRONT
+
3= =3
caqj
1.
Top ring
2. Second ring
3. Steel oil control rings
4. Oil Control Ring Expander
Note:
• The top ring gap should be positioned in the 7
o'clock position, the second ring gap in the 1
o'clock position and the steel oil control ring
gaps in the 9 8. 3 o'clock positions (one in each
position).
8. Fit the piston into the bottom of the liner using a
gentle rocking motion to engage the rings in the
bore.
Fitting a Piston into a Liner
SelVice Manual - Rocket Ill/ Classic / Touring
5.19