ENG
CRANKSHAFT AND CRANKCASES
5. Check:
• bearing
Damage/Excessive noise
-->
Replace.
6. Check:
• crankshaft oil galleries
Obstruction
-->
Blow out with compressed air.
CHECKING THE CRANKCASES
1. Check:
• crankcase (right)
Runout/Cracks
-->
Replace.
• oil routing galleries
Obstruction
-->
Blow out with compressed air.
2. Check:
• crankcase (left)
Runout/Cracks
-->
Replace.
• oil routing galleries
Obstruction
-->
Blow out with compressed air.
3. Clean:
• bond residues
• gasket residues
CHECKING THE TIMING CHAIN GUIDE AND
TIMING CHAIN
1. Check:
• timing chain
Damage/Stiffness
-->
Replace the timing
chain and the crankshaft sprocket as a set.
2. Check:
• crankshaft sprocket
Wear higher to
1
/
4
of tooth
-->
Replace the
components as a set (camshaft sprocket,
crankshaft sprocket and timing chain).
1
chain link
2
crankshaft sprocket
1
2
5-73
Summary of Contents for YBR250 2007
Page 1: ...YBR250 SERVICE MANUAL 5D1 F8197 E0 2007 ...
Page 2: ......
Page 359: ...YAMAHA MOTOR DA AMAZÔNIA LTDA ...
