Checking The Connecting Rods - Yamaha YZFR6X(C) 2008 Service Manual

Piston pin bore inside diameter
15.002–15.013 mm (0.5906–
0.5911 in)
Limit
15.043 mm (0.5922 in)
4. Calculate:
• Piston-pin-to-piston-pin-bore clearance
Out of specification → Replace the piston
pin and piston as a set.
• Piston-pin-to-piston-pin-bore clearance =
Piston pin bore diameter "b" -
Piston pin outside diameter "a"
Piston-pin-to-piston-pin-bore
clearance
0.002–0.022
0.00068 in)
ET2C01013

CHECKING THE CONNECTING RODS

1. Measure:
• Crankshaft-pin-to-big-end-bearing clear-
ance
Out of specification → Replace the big
end bearings.
Oil clearance
®
gauge )
0.037–0.061
0.0024 in)
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
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 orig-
inal positions.
CONNECTING RODS AND PISTONS
mm (0.00007–
(using plasti-
mm (0.0015–
5-61
a. Clean the big end bearings, crankshaft
pins, and the inside of the connecting rods
halves.
b. Install the big end upper bearing into the
connecting rod and the big end lower bear-
ing into the connecting rod cap.
NOTE:
Align the projections "a" on the big end bear-
ings with the notches "b" in the connecting rod
and connecting rod cap.
c. Put a piece of Plastigauge
crankshaft pin.
d. Assemble the connecting rod halves.
NOTE:
• Do not move the connecting rod or crank-
shaft 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
connecting rod and connecting rod cap are
aligned.
®
"1" on the
1