Yamaha YZF-R1S Service Manual - Eng
5-78
CONNECTING RODS AND PISTONS
ENG
NOTE:
CAUTION:
NOTE:
NOTE:
EAS00393
REMOVING THE CONNECTING RODS AND
PISTONS
The following procedure applies to all of the
connecting rods and pistons.
1. Remove:
Sconnecting rod cap
1
Sbig end bearings
SIdentify the position of each big end bearing so
that it can be reinstalled in its original place.
SAfter removing the connecting rods and con-
necting rod caps, care should be taken not to
damage the mating surfaces of the connecting
rods and connecting rod caps.
2. Remove:
SCylinder
SCylinder gasket
SCylinder stud bolts
3. Remove:
Spiston pin clips
1
Spiston pin
2
Spiston
3
Do not use a hammer to drive the piston pin
out.
SFor reference during installation, put identifica-
tion marks on the piston crown.
SBefore removing the piston pin, deburr the pis-
ton pin clip groove and the piston pin bore
area. If both areas are debarred and the piston
pin is still difficult to remove, remove it with the
piston pin puller set
4
.
Piston pin puller set
90890-01304, YU-01304
4. Remove:
Stop ring
S2nd ring
Soil ring
When removing a piston ring, open the end gap
with your fingers and lift the other side of the ring
over the piston crown.