Removing The Crankshaft Assembly; Checking The Oil Nozzles; Checking The Crankshaft - Yamaha 2011 FZ8NA(C) Service Manual

EAS25980

REMOVING THE CRANKSHAFT ASSEMBLY

1. Remove:
• Crankshaft assembly
• Crankshaft journal bearings
TIP
Identify the position of each crankshaft journal
bearing so that it can be reinstalled in its origi-
nal place.
EAS14B1025

CHECKING THE OIL NOZZLES

The following procedure applies to all of the oil
nozzles.
1. Check:
• Oil nozzle "1"
Damage/wear → Replace the oil nozzle.
• Oil passage
Obstruction → Blow out with compressed
air.
EAS26071

CHECKING THE CRANKSHAFT

1. Measure:
• Crankshaft runout
Out of specification → Replace the crank-
shaft.
Runout limit
0.030 mm (0.0012 in)
2. Check:
• Crankshaft journal surfaces
• Crankshaft pin surfaces
• Bearing surfaces
Scratches/wear → Replace the crank-
shaft.
3. Measure:
• Crankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification → Replace the crank-
shaft journal bearings.
Journal oil clearance
0.013–0.037
0.0015 in)
ECA13920
Do not interchange the crankshaft journal
bearings. To obtain the correct crankshaft-
journal-to-crankshaft-journal-bearing clear-
ance and prevent engine damage, the
crankshaft journal bearings must be
installed in their original positions.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Clean the crankshaft journal bearings,
crankshaft journals, and bearing portions of
the crankcase.
b. Place the upper crankcase upside down on
a bench.
c. Install the crankshaft journal upper bear-
ings "1" and the crankshaft into the upper
crankcase.
TIP
Align the projections "a" on the crankshaft jour-
nal upper bearings with the notches "b" in the
upper crankcase.
d. Put a piece of Plastigauge® "1" on each
crankshaft journal.
5-81
CRANKSHAFT
mm (0.0005–