Yamaha 2007 FZ6-NA Service Manual page 332

Out of specification → Replace the crank-
shaft journal bearings.
Crankshaft-journal-to-crank-
shaft journal bearing clearance
0.028–0.052 mm
(0.0011–0.0020 in)
ECA4S81028
CAUTION:
Do not interchange the crankshaft journal
bearings. To obtain the correct crankshaft
journal- to-crankshaft-journal-bearing
clearance and prevent engine damage, the
crankshaft journal bearings must be
installed in their original positions.
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a. Clean the crankshaft journal bearings,
crankshaft journals, and bearing portions of
the crankcase.
b. Place the upper crankcase upside down on
a bench.
c. Install the crankshaft journal upper bear-
ings "1" and the crankshaft into the upper
crankcase.
NOTE:
Align the projections "a" on the crankshaft jour-
nal upper bearings with the notches "b" in the
upper crankcase.
d. Put a piece of Plastigauge
crankshaft journal.
NOTE:
Do not put the Plastigauge
the crankshaft journal.
®
"2" on each
®
over the oil hole in
e. Install the crankshaft journal lower bear-
ings "1" into the lower crankcase and
assemble the crankcase halves.
NOTE:
• Align the projections "a" of the crankshaft
journal lower bearings with the notches "b" in
the lower crankcase.
• Do not move the crankshaft until the clear-
ance measurement has been completed.
f. Tighten the bolts to specification in the
tightening sequence cast on the crankcase.
Crankcase bolt
Bolt "1"–"10"
1st: 12 Nm (1.2 m·kg, 8.7 ft·lb)
2nd: 25 Nm (2.5 m·kg, 18 ft·lb)
3rd*: 27 Nm (2.7 m·kg, 20 ft·lb)
Bolt "11", "12"
24 Nm (2.4 m·kg, 17 ft·lb)
Bolt "13", "14"
14 Nm (1.4 m·kg, 1.0 ft·lb)
Bolt "15"–"27"
12 Nm (1.2 m·kg, 8.7 ft·lb)
*Loosen the bolts following the tightening
order and then tighten to specification
torque.
NOTE:
Lubricate the crankcase bolt threads with
engine oil.
5-71
CRANKSHAFT