Internal Marking On Second Generation Crankcases; Crankcase Classes - APRILIA DORSODURO 1200 ABS - ATC Service Station Manual

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Characteristics
Crankcases are classified in two classes (1 or 2) depending on the diameter of the main bearing seat.
The class is indicated on both crankcase halves, specifically, in the rear cylinder area on flywheel side
crankcase halves and in the front cylinder area on clutch side crankcase halves.
Specification
Crankcase class 1
Crankcase class 2

INTERNAL MARKING ON SECOND GENERATION CRANKCASES

Crankcases are classified in two classes (1 or 2) depending on the diameter of the main bearing seat.
The class is indicated on both crankcase halves, specifically, in the starter gear area on flywheel side
crankcase halves and in the gearbox control mechanism area on clutch side crankcase halves.
See also
Removing the flywheel cover
CHAR - 54
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DORSODURO 1200 ABS - ATC
C
RANKCASE CLASSES
Bushing seat diameter: 53.954 - 53.960 mm (2.1241 - 2.1244
Bushing seat diameter: 53.960 - 53.966 mm (2.1244 - 2.1246
Desc./Quantity
in)
in)