Piston Ring Gap; Aligning Piston Rings Using The Piston; Piston Assembly; Piston Ring Identification - Triumph Tiger Service Manual

6 CRANKSHAFT/RODS/PISTONS
Piston Ring to Ring Groove Clearance Check
Piston ring/Groove Clearance
Top 0.02 - 0.06 mm
Second 0.02 - 0.06 mm
Piston Ring Gap
NOTE:
•
1.
Before final assembly the piston ring gap, when
fitted in the liner, must first be checked.
Place, the piston ring inside the liner.
2. Push the ring into the top of the cylinder, using the
piston to hold the ring square with the inside of the
bore. Continue to push the ring into the bore until the
third groove of the piston is level with the cylinder
top, around full circumference of cylinder.
Aligning Piston Rings using the Piston
3. Remove the piston and measure the gap between
the ends of the piston ring using feeler gauges.
6.20
Piston Ring End Gap Tolerances
Top 0.11 - 0.26 mm
Second 0.26 - 0.41 mm
Oil Control 0.20 - 0.70 mm
4. If the ring gap is found to be too small, the ring end
must be carefully filed until the correct gap is
achieved. If the gap is too large, replace the rings
with a new set. If the gap remains too large with new
rings fitted, both the piston and liner must be
replaced.
Piston Assembly
1. Thoroughly clean the piston ring grooves and fit the
piston rings to the piston.
NOTE:
• The top ring upper surface is marked 'N' and can
be identified by a chamfer on the inside edge.
The top ring hasa shiny grey appearance.
•
•
The second ring upper surface is also marked
'N' but is plain on the inside edge and has a
bronze appearance.
The oil control rings can be fitted with either
face upward.
Top Ring
Second Ring
Piston Ring Identification