Checking The Crankcase; Checking The Bearings And Oil Seals; Checking The Sprockets And Chains - Yamaha YZF-R6 99 Service Manual

CRANKCASE
EAS00399

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:
S upper crankcase
S lower crankcase
Cracks/damage ! Replace.
S oil delivery passages
Obstruction ! Blow out with compressed air.
EAS00401
CHECKING THE BEARINGS AND OIL
SEALS
1. Check:
S bearings
Clean and lubricate the bearings, then rotate
the inner race with your finger.
Rough movement ! Replace.
2. Check:
oil seals
Damage/wear ! Replace.

CHECKING THE SPROCKETS AND CHAINS

1. Check:
S crankshaft sprocket 1
S oil/water pump assembly drive sprocket 2
Cracks/damage/wear ! Replace the de-
fective part(-s).
2. Check:
S timing chain 1
Damage/stiffness ! Replace the timing
chain and crankshaft sprocket as a set.
S oil/water pump assembly drive chain 2
Damage/stiffness ! Replace the oil/water
pump assembly drive chain and oil/water
pump assembly drive sprocket as a set.
4-63
ENG