Removing The Crankshaft Assembly; Checking The Crankshaft - Yamaha XVZ13TF 1999 Service Manual

CRANKSHAFT
EAS00387

REMOVING THE CRANKSHAFT ASSEMBLY

1. Remove:
S balancer shaft 1
S crankshaft assembly 2
S crankshaft journal upper bearings
(from the upper crankcase)
NOTE:
Identify the position of each crankshaft journal
upper bearing so that it can be reinstalled in its
original place.
EAS00395

CHECKING THE CRANKSHAFT

1. Measure:
S crankshaft runout
Out of specification ! Replace the crank-
shaft.
Crankshaft runout
Less than 0.03 mm
2. Check:
S crankshaft journal surfaces
S crankshaft pin surfaces
S bearing surfaces
Scratches/wear ! Replace the crankshaft.
3. Measure:
S crankshaft-journal-to-crankshaft-journal-
bearing clearance
Out of specification ! Replace the crank-
shaft journal bearings.
Crankshaft-journal-to-crankshaft-
journal-bearing clearance
0.020 X 0.038 mm
<Limit>: 0.1 mm
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 crank-
shaft 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 bearings
1 and the crankshaft into the upper crank-
case.
4-78
ENG