Checking The Big End Bearings - Yamaha 2009 Diversion XJ6S Service Manual

4. Calculate:
Piston-pin-to-piston-pin-bore clearance
G
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
0.007–0.023 mm
(0.0001–0.0009 in)
Limit
0.073 mm (0.0029 in)
EAS4S81037

CHECKING THE BIG END BEARINGS

1. Measure:
Crankshaft-pin-to-big-end-bearing clearance
G
Out of specification → Replace the big end
bearings.
Oil
gauge®)
0.038–0.062 mm
(0.0015–0.0024 in)
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
The following procedure applies to all of the
connecting rods.
ECA4S81025
NOTICE
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 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.
TIP
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® "1" on the crank-
shaft pin.
5-69
CRANKSHAFT
clearance (using plasti-
clear-