Checking The Piston Pins - Yamaha FZS600'98 Service Manual

CYLINDER AND PISTON
2. Install:
a
3. Measure:
EB404421

CHECKING THE PISTON PINS

The following procedure applies to all of the pis-
ton pins.
1. Check:
2. Measure:
a
4-28
S piston ring 1
(into the cylinder)
NOTE:
Level the piston ring in the cylinder with the
piston crown as shown.
a 20 mm
S piston ring end gap
Out of specification ! Replace the piston
ring.
NOTE:
The oil ring expander spacer's end gap can-
not be measured. If the oil ring rail's gap is
excessive, replace all three piston rings.
Piston ring end gap
Top ring
0.15 X 0.30 mm
<Limit>: 0.6 mm
2nd ring
0.25 X 0.40 mm
<Limit>: 0.7 mm
Oil ring
0.1 X 0.35 mm
S piston pin
Blue discoloration/grooves ! Replace the
piston pin and then check the lubrication
system.
S piston pin outside diameter a
Out of specification ! Replace the piston
pin.
Piston pin outside diameter
16.991 X 17.000 mm
ENG