Removing The Connecting Rods And Pistons; Checking The Cylinders And Pistons - Yamaha FJR13AEV(C) Service Manual

EAS26030
REMOVING THE CONNECTING RODS AND
PISTONS
The following procedure applies to all of the con-
necting rods and pistons.
1. Remove:
• Connecting rod cap "1"
NOTE:
Identify the position of each connecting rod so
that it can be reinstalled in its original place.
2. Remove:
• Big end bearings
(from the connecting rods and connecting rod
caps)
NOTE:
Identify the position of each big end bearing so
that it can be reinstalled in its original place.
3. Remove:
• Piston pin clips "1"
• Piston pin "2"
• Piston "3"
• Connecting rod "4"
ECA13810
CAUTION:
Do not use a hammer to drive the piston pin
out.
NOTE:
• For reference during installation, put an identi-
fication mark on each piston crown.
• Before removing the piston pin, deburr the pis-
ton pin clip's groove and the piston's pin bore
area. If both areas are deburred and the piston
pin is still difficult to remove, remove it with the
piston pin puller set "5".
Piston pin puller set
90890-01304
Piston pin puller
YU-01304
CONNECTING RODS AND PISTONS
1
4. Remove:
• Top ring
• 2nd ring
• Oil ring
NOTE:
When removing a piston ring, open the end gap
with your fingers and lift the other side of the ring
over the piston crown.
EAS24410

CHECKING THE CYLINDERS AND PISTONS

The following procedure applies to all of the cyl-
inders and pistons.
1. Check:
• Piston wall
• Cylinder wall
Vertical scratches → Rebore or replace the
cylinder, and replace the piston and piston
rings as a set.
2. Measure:
• Piston-to-cylinder clearance
M MMM M MMM M
a. Measure cylinder bore "C" with the cylinder
bore gauge.
5-105
4
2
M MMM M M MMM M M MMM M M MMM M
3
MMM