Yamaha VMX12 2001, Service Manual

Page: 202 / 454

4 - 72
ENG
CRANKSHAFT
NOTE:
@
• Align the projections of the balancer shaft
journal lower bearings with the notches 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 tight-
ening sequence cast on the crankcase.
NOTE:
@
Lubricate the bolt threads with engine oil.
@
g. Remove the lower crankcase and the bal-
ancer shaft journal lower bearings.
h. Measure the compressed Plastigauge
®
width
2
on each balancer shaft journal. If
the balancer shaft-journal-to-balancer shaft-
journal-bearing clearance is out of specifi-
cation, select replacement balancer shaft
journal bearings.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
T
R
.
.
Crankcase bolt
24 Nm (2.4 m • kg)
2. Select:
• balancer shaft journal bearings (J
5
~ J
6
)
NOTE:
@
• The numbers
È
stamped into the balancer
shaft web and the numbers
1
stamped into
the lower crankcase are used to determine
the replacement balancer shaft journal bear-
ing sizes.
• “J
5
~ J
6
” refer to the bearings shown in the
balancer shaft illustration.
• If “J
5
~ J
6
” are the same, use the same size
for all of the bearings.
@
For example, if the crankcase “J
5
” and bal-
ancer shaft web “J
5
” numbers are “6” and “2”
respectively, then the bearing size for “J
5
” is: