Crankcase Check - APRILIA RS4 125 Service Station Manual

Engine
•
Insertion of secondary shaft roller bearing cage: 020363Y Removal of the secondary shaft
roller bearing cage: use universal extractor
•
Insertion of countershaft roller bearing cage: 020483Y Removal of countershaft roller bear-
ing cage: 020364Y

Crankcase check

There are two classes of couplings highlighted on the crankcases (X-Y and S-T).
The coupling between the gears of the crankshaft and the first gear shaft has been classified into two
classes. These classes are defined according to the interaxial distance that exists between two ele-
ments:
COUPLING CLASS INTERVALS CRANKSHAFT - FIRST GEAR SHAFT
Specification
Therefore, the couplings will be:
COUPLING CLASSES CLUTCH HOUSING - FIRST GEAR SHAFT
Coupling classes on Crankcase
X
Y
The coupling between the gears of the first gear shaft and gear of the balancing countershaft has been
classified into two classes. These classes are defined according to the interaxial distance that exists
between two elements:
COUPLING CLASS INVERVALS FIRST GEAR SHAFT - BALANCING COUNTERSHAFT
Specification
ENG - 164
X
Y
Clutch housing gear
S
T
Desc./Quantity
86.00 - 86.04 mm (3.386 - 3.388 in)
85.96 - 86.00 mm (3.384 - 3.386 in)
X
Y
Desc./Quantity
64.00 - 64.03 mm (2.520 - 2.521 in)
63.97 - 64.00 mm (2.519 - 2.520 in)
RS4 125
Transmission gear
X
Y