Yamaha 2007 FZ6-NA, Руководство по обслуживанию

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CRANKSHAFT
5-65
4. Calculate:
• Piston-pin-to-piston-pin-bore clearance
Out of specification
→
Replace the piston
pin and piston as a set.
EAS4S81037
CHECKING THE BIG END BEARINGS
1. Measure:
• Crankshaft-pin-to-big-end-bearing clear-
ance
Out of specification
→
Replace the big end
bearings.
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The following procedure applies to all of the
connecting rods.
CAUTION:
ECA4S81025
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.
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:
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
®
“1” on the
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 seats with
molybdenum disulfide grease.
• Make sure that the “Y” mark “c” on the con-
necting rod faces towards the left side of the
crankshaft.
• Make sure that the characters “d” on both the
connecting rod and connecting rod cap are
aligned.
Piston pin bore inside diameter
16.002–16.013 mm (0.6300–
0.6304 in)
Limit
16.043 mm (0.6316 in)
• 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 mm (0.0001–
0.0009 in)
Limit
0.072 mm (0.0028 in)
Crankshaft-pin-to-big-end-bear-
ing clearance
0.038–0.062 mm
(0.0015–0.0024 in)