Yamaha FX Nytro FX10X, Service Manual

Page: 526 / 859

5-72
ENG
CRANKSHAFT AND BALANCER SHAFT
Measurement steps:
CAUTION:
Do not interchange the crankshaft journal bear-
ings. 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 posi-
tions.
• Clean the crankshaft journal bearings, crank-
shaft journals, and bearing portions of the
crankcase.
• Place the upper crankcase upside down on a
bench.
• Install the crankshaft journal upper bearings 1
and the crankshaft into the upper crankcase.
NOTE:
Align the projections
a
of the crankshaft journal
upper bearings with the notches
b
in the crank-
case.
• Put a piece of Plastigauge
®
b
on each crank-
shaft journal.
NOTE:
Do not put the Plastigauge
®
over the oil hole in the
crankshaft journal.
b
• Install the crankshaft journal lower bearings
2
into the lower crankcase and assemble the
crankcase halves.
NOTE:
• Align the projections
c
of the crankshaft journal
lower bearings with the notches
d
in the crank-
case.
• Do not move the crankshaft until the clearance
measurement has been completed.