Service Points; Crankshaft Removal; Crankshaft Inspection - Yamaha VX110 Sport Service Manual

POWR
1
CRANKSHAFT

SERVICE POINTS

Crankshaft removal

1. Remove:
• Crankshaft 1
• Crankshaft journal lower bearings
(from the lower crankcase)
• Crankshaft journal upper bearings
(from the upper crankcase)
NOTE:
Identify the position of each crankshaft journal
bearing so that it can be reinstalled in its origi-
nal place.

Crankshaft inspection

1. Measure:
• Crankshaft runout
Out of specification → Replace the
crankshaft.
Maximum crankshaft runout:
0.03 mm (0.0012 in)
2. Check:
• Crankshaft journal surfaces
• Crankshaft pin surfaces
Scratches/wear → Replace the crank-
shaft.
• Bearing surfaces
Scratches/wear → Replace the crank-
shaft journal bearing.
3. Measure:
• Crankshaft journal oil clearance
Out of specification → Replace the
crankshaft journal bearings.
Crankshaft journal oil clearance:
0.004–0.028 mm
(0.0002–0.0011 in)
5-94
E