Triumph DAYTONA 675 Service Manual page 120

Piston Assembly
1. Clean the piston ring grooves and fit the piston rings
to the piston.
Note:
The top ring upper surface is marked 'T1'
and can be identified by a chamfer on the
inside edge. When new, the top ring also has
a blue paint marking on its outer edge.
The second ring upper surface is marked
'T2', is plain on the inside edge and has a
bronze appearance. When new, the second
ring also has a yellow paint marking on its
outer edge.
When new, the oil control rings can be fi tted
with either face upward. Used oil control
rings must be refitted in the same
orientation as noted prior to removal. When
new, the oil control rings have white paint
markings on their outside edge.
Second Ring
cbxyt
Piston Ring Identification
1. Fit the piston onto the connecting rod.
Note:
• Connecting rods may be fitted either way
around. However, ensure all three are fitted
the same way.
2. Lubricate the piston, small end and gudgeon pin
with a 50/50 solution of engine oil and molybdenum
disulphide grease.
3. Align the small end in the connecting rod with the
gudgeon pin hole in the piston and fit the gudgeon
pin.
4. Fit new circlips on both sides of the gudgeon pin
ensuring the circlips are correctly fitted in the
grooves.
Service Manual - Daytona 675, Street Triple and Street Triple R
ll1MP
Crankshaft, Connecting Rods and Pistons
Failure to use new gudgeon pin circlips could allow the
pin to detach from the piston. This could seize the
engine and lead to an accident.
5. The piston ring gaps must be arranged as shown in
the diagram below.
3
5
1. Top ring
2. Second ring
3. Fi
rst steel oil control ring
4. Oil control ring expander
5. Second steel oil control ring
Note:
• The top ring gap should be positioned in the
N
6. Fit the piston into the liner from below using a gentle
rocking motion to engage the rings in the bore.
A Warning
1
2
4
12 o'clock position, and the second ring gap
in the 6 o'clock position. The first steel oil
control ring gap should be in the 12 o'clock
position and the second steel oil control ring
should be in the 6 o'clock position. The oil
control ring expander should be in the
7 o'clock position.
FRONT
+
1 3
^^
2 5
5.15