Yamaha R1 Series 2015, Service Manual

Page: 427 / 704

CRANKSHAFT AND BALANCER SHAFT
5-86
d. Put a piece of Plastigauge® “1” on each
crankshaft journal.
TIP
Do not put the Plastigauge® over the oil hole in
the crankshaft journal.
e. Install the crankshaft journal lower bearings
“1” into the lower crankcase and assemble
the crankcase halves.
TIP
•
Align the projections “a” of the crankshaft jour-
nal lower bearings with the notches “b” in the
lower crankcase.
• Do not move the crankshaft until the clearance
measurement has been completed.
f. Tighten the bolts to specification in the tight-
ening sequence cast on the crankcase.
Refer to “CRANKCASE” on page 5-64.
g. Remove the lower crankcase and the crank-
shaft 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 specification,
select replacement crankshaft journal bear-
ings.
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4. Select:
• Crankshaft journal bearings (J
1
–J
5
)
TIP
•
The numbers “A” stamped into the crankshaft
web and the numbers “B” stamped into the
lower crankcase are used to determine the re-
placement crankshaft journal bearing sizes.
•
“J
1
”–“J
5
” refer to the bearings shown in the
crankshaft and lower crankcase illustration.
•
If “J
1
”–“J
5
” are the same, use the same size for
all of the bearings.
For example, if the crankcase “J
1
” and crank-
shaft web “J
1
” numbers are 5 and 2 respec-
tively, then the bearing size for “J
1
” is:
1
a
b
1
1
a
b
“J
1
” (crankcase) - “J
1
” (crankshaft web) + 4 = 5 - 2
+ 4 = 7 (red)
Bearing color code
1.Blue 2.Black 3.Brown 4.Green
5.Yellow 6.Pink 7.Red
a
J
1
J
2
J
3
J
4
J
5