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- The brass housing hole is in the only category reported
below.
- The standard brass diameter after driving is variable on the
basis of a coupling selection.
- The brass seats into the crankcases are classified into 2 cate-
gories as for the driving shaft Cat. 1 and Cat. 2.
- Brasses are divided into 3 categories according to their thick-
ness. See the table below:
TYPE
RED
A
B
BLUE
C
YELLOW
Type "A"
1,970 ÷
Bench
halfbearing
1,973
Half
Brass
crankcase
category
category
1
A
B
1
2
2
C
Match the shaft with two category 1 shoulders with category 1
crankcase (or cat. 2 with cat. 2).
A spare crankcase cannot be combined with a driving shaft with
mixed categories. Spare shafts have half-shafts of the same
category.
HALF-CRANKCASE ENGINE HALFSHAFT
CAT. 1
CAT. 2
CAT. 1
CAT. 2
136
IDENTIFICATION
Type "A"
Type "A"
1,9703 ÷
1,976 ÷
1,976
1,979
Brass inside
Possibility of
diameter
assembly
after
reassembly
29,025 ÷ 29,040
Original
29,019 ÷ 29,034
Original
and spare
29,028 ÷ 29,043
29,022 ÷ 29,037
Original
BRASS
CAT. 1
B
CAT. 2
B
CAT. 2
A
CAT. 1
C
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