Yamaha 1998 FZS600 5DM1-AE1, Service Manual

Page: 140 / 364

4-28
CYLINDER AND PISTON
ENG
a
a
NOTE:
NOTE:
2. Install:
piston ring 1
(into the cylinder)
Level the piston ring in the cylinder with the
piston crown as shown.
a 20 mm
3. Measure:
piston ring end gap
Out of specification
Replace the piston
ring.
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 0.30 mm
<Limit>: 0.6 mm
2nd ring
0.25 0.40 mm
<Limit>: 0.7 mm
Oil ring
0.1 0.35 mm
EB404421
CHECKING THE PISTON PINS
The following procedure applies to all of the pis-
ton pins.
1. Check:
piston pin
Blue discoloration / grooves
Replace the
piston pin and then check the lubrication
system.
2. Measure:
piston pin outside diameter
a
Out of specification Replace the piston
pin.
Piston pin outside diameter
16.991 17.000 mm