Yamaha SX150C Service Manual page 138

POWR
CYLINDER BODY ASSEMBLY
5510
5620
5630
5640
5650
INSPECTING THE OIL PUMP DRIVEN
GEAR
Inspect:
• Oil pump driven gear
Cracks/pitting/wear → Replace.
INSPECTING THE LABYRINTH
1. Inspect:
• Labyrinth ring 1
Cracks/damage/wear → Replace.
2. Measure:
• Labyrinth ring wear a or b + c
Out of specification → Replace.
Labyrinth ring wear limit
0.10 mm (0.004 in)
INSPECTING THE CRANKSHAFT
1. Measure:
• Crankshaft runout
(with V-blocks and a dial gauge)
Out of specification → Replace.
Runout limit
0.05 mm (0.002 in)
2. Measure:
• Small-end axial play
Out of specification → Replace the
connecting rod.
Small-end axial play limit
2.0 mm (0.08 in)
3. Measure:
• Big-end side clearance
Out of specification → Replace the
connecting rod.
Big-end side clearance
0.12 - 0.26 mm (0.005 - 0.010 in)
5-51
E
5
RINGS5
5