APRILIA SCARABEO 125 Service Manual page 118

Engine
020701Y Punch for bushings
Inspecting the crankshaft alignment
•
Install the crankshaft on the support
and measure the misalignment at the
two points indicated in the figure.
•
Check that the crankshaft cone, the tab
fitting, the oil seal flow, the knurling and
the threaded tangs are in good working
order.
•
In case of failure, replace the crank-
shaft.
•
The crankshaft spare part has a sole
code (there are no different types to
select from).
•
It should be checked that the diametral
clearance is between 0.02 mm
(0.00079 in) and 0.06 mm (0.0024 in)
for both sides.
•
If this condition is not fulfilled, the half-
bearings should be replaced.
The rod head bushings cannot be replaced.
Therefore, the connecting rod cannot be replaced
either. When cleaning the crankshaft, be very
careful that no impurities get in through the shaft
lubrication hole.
In order to prevent damaging the connecting rod
bushings, do not attempt cleaning the lubrication
duct with compressed air.
•
The wrong installation of a buffer can
seriously affect the bushing lubrication
pressure.
NOTE
CRANKCASE BEARINGS ARE NOT GRINDABLE.
Specific tooling
020074Y Support base for checking crankshaft
alignment
ENG - 118
SCARABEO 125 - 200