Disassembling The Crankcase; Checking The Crankcase; Checking The Bearings And Oil Seal; Checking The Oil Delivery Pipes - Yamaha V Star 950 Service Manual

EAS25560

DISASSEMBLING THE CRANKCASE

1. Remove:
• Crankcase bolts
TIP
Loosen each bolt 1/4 of a turn at a time, in
stages and in a crisscross pattern. After all of
the bolts are fully loosened, remove them.
• M10 × 110 mm bolts "1"
• M6 × 120 mm bolts "2"
• M6 × 80 mm bolts "3"
A. Right crankcase
B. Left crankcase
2. Remove:
• Left crankcase
ECA13900
Tap on one side of the crankcase with a
soft-face hammer. Tap only on reinforced
portions of the crankcase, not on the
crankcase mating surfaces. Work slowly
and carefully and make sure the crankcase
halves separate evenly.
EAS25580

CHECKING THE CRANKCASE

1. Thoroughly wash the crankcase halves in a
mild solvent.
2. Thoroughly clean all the gasket surfaces
and crankcase mating surfaces.
3. Check:
• Crankcase
Cracks/damage → Replace.
• Oil delivery passages
Obstruction → Blow out with compressed
air.
EAS3D81029

CHECKING THE BEARINGS AND OIL SEAL

1. Check:
• Bearings
Clean and lubricate the bearings, then
rotate the inner race with your finger.
Rough movement → Replace.
• Oil seals
Damage/wear → Replace.
EAS5S71002

CHECKING THE OIL DELIVERY PIPES

The following procedure applies to all of the oil
delivery pipes and joint pipe.
1. Check:
• Oil delivery pipe
• Joint pipe
Damage → Replace.
Obstruction → Wash and blow out with
compressed air.
EAS25620

CHECKING THE TIMING CHAINS

1. Check:
• Timing chains
Damage/stiffness → Replace the timing
chain and camshaft sprocket as a set.
EAS5S71003
CHECKING THE OIL PUMP DRIVEN
SPROCKET
1. Check:
• Oil pump driven sprocket
Cracks/damage/wear → Replace the oil
pump driven sprocket and the oil pump
drive chain as a set.
EAS5S71010

INSTALLING THE BEARING RETAINERS

1. Install:
• Bearing retainers "1"
TIP
• Install each bearing retainer "1" with its
"OUT" mark "a" facing outward.
• Apply locking agent (LOCTITE®) to the
threads of the bearing retainer bolt.
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CRANKCASE