Checking The Balancer - Yamaha Vmax VMX17C 2009 Service Manual

B
J1 J2 J3 J4
For example, if the lower crankcase J
crankshaft web J numbers are 5 and 1 re-
1
spectively, then the bearing size for J
J (crankcase) - J (crankshaft web)
1 1
=
5 - 1 = 4 (green)
Bearing color code
1.Blue 2.Black 3.Brown 4.Green
5.Yellow
EAS26120

CHECKING THE BALANCER

1. Check:
• Balancer shaft
Cracks/damage/wear → Replace the balanc-
er shaft and bearings.
Dirt → Clean.
• Bearings
Damage/wear → Replace.
2. Measure:
• Balancer shaft-journal-to-balancer shaft-jour-
nal-bearing clearance
Out of specification → Replace the balancer
shaft journal bearings.
Journal oil clearance
0.016–0.068 mm (0.0006–0.0027
in)
ECA2S31047
NOTICE
Do not interchange the balancer shaft jour-
nal bearings. To obtain the correct balancer
shaft-journal-to-balancer shaft-journal-bear-
ing clearance and prevent engine damage,
the balancer shaft journal bearings must be
installed in their original positions.
M MMM M MMM M M MMM M M MMM M
a. Clean the balancer shaft journal bearings,
balancer shaft journals, and bearing portions
of the crankcase.
CRANKSHAFT AND BALANCER
and
1
is:
1
M MMM M M MMM M MMM
5-95
b. Place the upper crankcase upside down on a
bench.
c. Install the balancer shaft journal upper bear-
ings "1" and the balancer shaft into the upper
crankcase.
TIP
Align the projections "a" on the balancer shaft
journal upper bearings with the notches "b" in the
upper crankcase.
c. Oil groove
d. Put a piece of Plastigauge® "2" on each bal-
ancer shaft journal.
TIP
Do not put the Plastigauge® over the oil hole in
the balancer shaft journal.
e. Install the balancer shaft journal lower bear-
ings "3" into the lower crankcase and assem-
ble the crankcase halves.
TIP
• Align the projections "d" of the balancer shaft
journal lower bearings with the notches "e" in
the lower crankcase.
• Do not move the balancer shaft until the clear-
ance measurement has been completed.
1
a
b
c
2