Checking The Connecting Rods - Yamaha FJR13AEV(C) Service Manual

ET3P61028

CHECKING THE CONNECTING RODS

1. Measure:
• Crankshaft-pin-to-big-end-bearing clearance
Out of specification → Replace the big end
bearings.
Oil clearance (using plasti-
®
gauge )
0.031–0.048 mm (0.0012–0.0019
in)
M MMM M MMM M M MMM M M MMM M
The following procedure applies to all of the
connecting rods.
ECA13930
CAUTION:
Do not interchange the big end bearings and
connecting rods. To obtain the correct
crankshaft-pin-to-big-end-bearing clear-
ance and prevent engine damage, the big
end bearings must be installed in their origi-
nal positions.
a. Clean the big end bearings, crankshaft pins,
and the inside of the connecting rod halves.
b. Install the big end upper bearing into the con-
necting rod and the big end lower bearing into
the connecting rod cap.
NOTE:
Align the projections "a" on the big end bearings
with the notches "b" in the connecting rod and
connecting rod cap.
c. Put a piece of Plastigauge
shaft pin.
CONNECTING RODS AND PISTONS
M MMM M M MMM M MMM
®
"1" on the crank-
5-108
d. Assemble the connecting rod halves.
NOTE:
• Do not move the connecting rod or crankshaft
until the clearance measurement has been
completed.
• Lubricate the bolt threads and nut seats with
molybdenum disulfide grease.
• Make sure the "Y" mark "c" on the connecting
rod faces towards the left side of the crank-
shaft.
• Make sure the characters "d" on both the con-
necting rod and connecting rod cap are
aligned.
c
e. Tighten the connecting rod nuts.
Refer to "INSTALLING THE CONNECTING
RODS AND PISTONS" on page 5-109.
f. Remove the connecting rod and big end
bearings.
Refer to "REMOVING THE CONNECTING
RODS AND PISTONS" on page 5-105.
g. Measure the compressed Plastigauge
"e" on the crankshaft pin.
If the crankshaft-pin-to-big-end-bearing
clearance is out of specification, select re-
placement big end bearings.
1
d
®
width