Checking The Big End Bearings - Yamaha FZ6-ST Supplementary Service Manual

CONNECTING RODS AND PISTONS
20

CHECKING THE BIG END BEARINGS

1. Measure:
• crankshaft-pin-to-big-end-bearing
ance
Out of specification → Replace the big end
bearings.
Crankshaft-pin-to-big-end-bearing
clearance
0.028 ~ 0.052 mm
(0.0011 ~ 0.0020 in)
The following procedure applies to all of the
connecting rods.
CAUTION:
Do not interchange the big end bearings
and connecting rods. To obtain the correct
crankshaft-pin-to-big-end-bearing
ance and prevent engine damage, the big
end bearings must be installed in their orig-
inal 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
connecting rod and the big end lower bear-
ing into the connecting rod cap.
NOTE: NOTE:
Align the projections
ings with the notches
and connecting rod cap.
c. Put a piece of Plastigauge
crankshaft pin.
d. Assemble the connecting rod halves.
NOTE: NOTE:
• Do not move the connecting rod or crankshaft
until the clearance measurement has been
completed.
• Lubricate the bolt threads and seats with
molybdenum disulfide grease.
• Make sure that the "Y" mark
necting rod faces towards the left side of the
crankshaft.
• Make sure that the characters
connecting rod and connecting rod cap are
aligned.
ENG
clear-
clear-
on the big end bear-
in the connecting rod
®
on the
on the con-
on both the