VESPA GT 125 Workshop Manual page 156

Engine
- The bushing housings in the crankcase are avail-
able in two categories, Cat. 1 and Cat. 2, as are
the crankshafts.
- The main bushings are available in three thick-
ness categories, identified by colour markings, as
shown in the table below.
TYPE
A
B
C
Type "A" -
RED
Crankshaft 1.970 ÷
half-bearing 1.973
Bushing Crankcase Internal bushing
category halves cat- diameter after fit-
egory
A 1
B 1
2
C 2
Match the shaft with two category 1 crank webs
with the category 1 crankcase (or cat. 2 with cat.
2) Furthermore a spare crankcase cannot be
matched with a crankshaft with mixed categories.
The spare crankshaft has half shafts of the same
category.
Crankcase halves Engine half
Cat. 1
Cat. 2
Cat. 1
Cat. 2
N.B.
TO KEEP THIS POSITION OF THE BUSHINGS ON THE
CRANKCASE, FITTING IS FORCED ON STEEL RINGS IN-
SERTED IN THE CASTING OF BOTH CRANKCASE
HALVES.
N.B.
DO NOT TAKE THE MEASUREMENT ON THE TWO HALF-
SHELL COUPLING SURFACE SINCE THE ENDS ARE RE-
ENG - 156
IDENTIFICATION
RED
BLUE
YELLOW
Type "B" - Type "C" -
BLUE YELLOW
1.9703 ÷ 1.976 ÷
1.976 1.979
Possible fit-
ting
ting
29.025 ÷ 29.040 Original
29.019 ÷ 29.034 Original and
spare
29.028 ÷ 29.043
29.022 ÷ 29.037 Original
Bushing
shaft
Cat. 1 B
Cat. 2 B
Cat. 2 A
Cat. 1 C
Vespa GT 125-200