APRILIA SCARABEO 500 2008 Service Station Manual page 210

Engine
- Complete FC3 crankcase equipped with bushings to house a category 1 crankshaft and a countershaft
with axial distance B.
- Complete FC4 crankcase equipped with bushings to house a category 2 crankshaft and a countershaft
with axial distance B.
NOTE
THE CRANKSHAFT CATEGORY IS STAMPED ON THE COUNTERWEIGHT SHOULDER.
Furthermore a replacement crankcase cannot be matched with a crankshaft with mixed categories. The
replacement crankshaft has half-shafts of the same category.
NOTE
TO REPLACE THE HALF-SHAFTS, REMOVE THE COUNTERSHAFT BEARINGS AS DESCRIBE
ABOVE. REMOVE THE COMPLETE DRIVEN PULLEY AND THE ANTI-FLAPPING ROLLER FROM
THE TRANSMISSION-SIDE CRANKCASE HALF, AS DESCRIBED IN THE «AUTOMATIC TRANS-
MISSION» CHAPTER, AND THE HUB COVER WITH THE RELEVANT GEARS AND BEARINGS AS
DESCRIBED IN THE «FINAL REDUCTION» CHAPTER.
Countershaft
- Using a micrometer, measure the 2 countershaft
bearings as shown in the figure.
Characteristic
Standard diameter:
17 - 0.01 - 0.02 mm
- Check that the water pump drive is not worn.
Refitting the crankshaft
- Check that the oil pump and countershaft control gear are not dented or distorted. Otherwise, replace
them.
NOTE
SHOULD THE OIL PUMP AND THE COUNTERSHAFT CONTROL GEAR NEED TO BE REPLACED,
IT IS NECESSARY TO REPLACE THE COUNTERSHAFT GEAR AS WELL.
ENG - 210
SCARABEO 500