Ducati MONSTER 821 Workshop Manual page 1132

Crankshaft is supplied in classes ranging from "A" to "D"
Select the bearing shells according to crankshaft and crankcase punching, as follows:
X - Fri: shimming on clutch side
Y - Alt: Shimming on generator side
Z - Bie: type of selected connecting rod
MAIN BEARING SHELLS CLASS
Crankshaft Crank pin size
class (mm)
A 49.992 to 45.000 A
A 49.992 to 45.000 B
B 49.984 to 49.992 A
B 49.984 to 49.992 B
C 44.976 to 44.984 A
C 44.976 to 44.984 B
D 44.968 to 44.976 A
D 44.968 to 44.976 B
COUPLING CLEARANCE 0.037 to 0.063
Important
As shown in the figure, the size class of the two main journals is punched on the crank web and CLUTCH
side and CHAIN side are clearly indicated.
Crankcase Crankcase hole size
class (mm)
49.000 to 49.008
49.008 to 49.016
49.000 to 49.008
49.008 to 49.016
49.000 to 49.008
49.008 to 49.016
49.000 to 49.008
49.008 to 49.016
1132
Shell Bearing shell thickness
colour (mm)
RED 1.994 to 1.999
BLUE 1.998 to 2.003
BLUE 1.998 to 2.003
YELLOW 2.002 to 2.007
YELLOW 2.002 to 2.007
BLACK 2.006 to 2.011
BLACK 2.006 to 2.011
GREEN 2.010 to 2.015
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