CRANKSHAFT/RODS/PISTONS 6
CRANKSHAFT
NOTE:
•
Before the crankshaft can be removed, the two
halves of the crankcase must first be separated.
Removal
1.
Remove the connecting rods as described in the
previous section.
2.
Remove the breather disc from the crankshaft.
3.
Remove the cam chain as described in the
cylinder head section.
4.
Release and remove the crankshaft from the
upper crankcase.
1161114
•
Remove all bearings and inspect for damage,
wear, overheating (blueing) and any other signs
of deterioration. Replace the bearings as a set if
necessary.
Installation
CAUTION: Always check the bearing
journal clearance, as described in the
following pages, before final assembly of the
crankshaft. Failure to correctly select crankshaft
bearings will result in severe engine damage.
1.
Select and fit new main and big end bearings
using the selection processes detailed later in this
section.
2.
Lubricate all bearings with engine oil.
3.
Ensure that the crankshaft is clean, and that the
oilways within the crank are free from blockages
and debris.
4.
Before fitting the crankshaft, check that the
balancer backlash eliminator gear tooth which is
marked with a line is directly in front of the balancer
drive gear marked with a dot.
1. Drive Gear Dot Marking
2. Backlash Eliminator Gear Line Marking
1.
Balancer Drive Gear Assembly
2.
Backlash Eliminator Gear Marking
6.15
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