Yamaha R6 2009 Service Manual page 276

e. Install the crankshaft journal lower bear-
ings "1" into the lower crankcase and
assemble the crankcase halves.
TIP
• 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.
Refer to "CRANKCASE" on page 5-53.
g. Remove the lower crankcase and the
crankshaft journal lower bearings.
h. Measure the compressed Plastigauge
width "a" on each crankshaft journal.
If the crankshaft-journal-to-crankshaft-jour-
nal-bearing clearance is out of specifica-
tion, select replacement crankshaft journal
bearings.
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4. Select:
• Crankshaft journal bearings (J
TIP
• The numbers "A" stamped into the crank-
shaft web and the numbers "B" stamped into
the lower crankcase are used to determine
the replacement crankshaft journal bearing
sizes.
• J –J refer to the bearings shown in the
1 5
crankshaft illustration.
• If J –J are the same, use the same size for
1 5
all of the bearings.
J
1
®
For example, if the crankcase J
shaft web J
tively, then the bearing size for J
J (crankcase) - J
1
=
6 - 2 - 1 = 3 (brown)
5-67
CRANKSHAFT
J J J
2 3 4
J J J J J
A
1 2 3 4 5
2 1 1 2 2 1 1 1 1
J J J J
B J
1 2 3 4 5
1
numbers are 6 and 2 respec-
1
(crankshaft web) - 1
1
–J )
1 5
J
5
and crank-
is:
1