Checking The Crankshaft; Checking The Crankshaft Drive Sprocket; Checking The Crankshaft Journal Bearings - Yamaha 2008 Fazer FZ1-N Service Manual

• If they are not flush with each other,
remove the connecting rod bolt and big
end bearing and restart from step "9". In
this case, make sure to replace the con-
necting rod bolt.
ECA14680
CAUTION:
• Do not use a torque wrench to tighten the
bolt to the specified angle.
• Tighten the bolt until it is at the specified
angles.
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EAS26070

CHECKING THE CRANKSHAFT

1. Measure:
• Crankshaft runout
Out of specification → Replace the crank-
shaft.
Crankshaft runout
Less than 0.03 mm (0.0012 in)
2. Check:
• Crankshaft journal surfaces
• Crankshaft pin surfaces
• Bearing surfaces
Scratches/wear → Replace the crank-
shaft.
EAS5D01022
CHECKING THE CRANKSHAFT DRIVE
SPROCKET
1. Check:
• Crankshaft drive sprocket "1"
Cracks/damage/wear → Replace the
defective part(s).
EAS5D01023
CHECKING THE CRANKSHAFT JOURNAL
BEARINGS
1. Measure:
• Crankshaft-journal-to-crankshaft-journal
bearing clearance
Out of specification → Replace the crank-
shaft journal bearings.
Crankshaft-journal-to-crank-
shaft-journal bearing clearance
0.014-0.037 mm (0.0006-0.0015
in)
Limit
0.10 mm (0.0039 in)
ECA5D01021
CAUTION:
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.
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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.
NOTE:
Align the projections "a" on the crankshaft jour-
nal upper bearings with the notches "b" in the
upper crankcase.
5-77
CRANKSHAFT