TYPE IDENTIFICATION
A RED
B BLUE
C YELLOW
Type "A"
- RED
Type "B"
- BLUE
Type "C"
- YEL-
LOW
Main half-
bearing
1.970 ÷
1.973
1.9703 ÷
1.976
1.976 ÷
1.979
Bush-
ing cat-
egory
Crank-
case
halves
category
Internal bush-
ing diameter
after fitting
Possible
fitting
A 1 29.025 ÷
29.040
Original
B 1 29.019 ÷
29.034
Original
and spare
2 29.028 ÷
29.043
C 2 29.022 ÷
29.037
Original
Match the shaft with two category 1 crank webs
with the category 1 crankcase (or cat. 2 with cat.
2) Furthermore a replacement crankcase cannot
be matched with a crankshaft with mixed catego-
ries. The replacement crankshaft has half-shafts
of the same category.
Crankcase
halves
Engine half-
shaft
Bushing
Cat. 1 Cat. 1 B
Cat. 2 Cat. 2 B
Cat. 1 Cat. 2 A
Cat. 2 Cat. 1 C
N.B.
TO KEEP THIS POSITION OF THE BUSHINGS
ON THE CRANKCASE, FITTING IS FORCED ON
STEEL RINGS INSERTED IN THE CASTING OF
BOTH CRANKCASE HALVES.
MP3 250 i.e. Engine
ENG - 55
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