Yu-1135-A/90890-01135; Crankcase Separating Tool - Yamaha YZ450F 2003 Fahrer- Und Wartungshandbuch

CRANKCASE AND CRANKSHAFT
NOTE:
4 - 89
Crankshaft
1. Remove:
Crankshaft 1
G
Use the crankcase separating tool 2.

Crankcase separating tool:

YU-1135-A/90890-01135

CAUTION:
Do not use a hammer to drive out the
crankshaft.
Crankshaft bearing
1. Remove:
Bearing 1
G
Remove the bearing from the crankcase by
G
pressing its inner race.
Do not use the removed bearing.
G
INSPECTION
Timing chain and timing chain guide
1. Inspect:
Timing chain
G
Cracks/stiff → Replace the timing chain
and camshaft sprocket as a set.
2. Inspect:
Timing chain guide
G
Wear/damage → Replace.
EC4N4101
Crankcase
1. Inspect:
Contacting surface a
G
Scratches → Replace.
Engine mounting boss b, crankcase
G
Cracks/damage → Replace.
2. Inspect:
Bearing
G
Rotate inner race with a finger.
Rough spot/seizure → Replace.
3. Inspect:
Oil seal
G
Wear/damage → Replace.
ENG