VESPA GTV 250 i.e. 2008 Service Station Manual page 143

Vespa GTV 250 i.e.
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.
DO NOT TAKE THE MEASUREMENT ON THE TWO HALF-
SHELL COUPLING SURFACE SINCE THE ENDS ARE RE-
LIEVED TO ALLOW BENDING DURING THE DRIVING
OPERATION.
N.B.
CRANKCASES FOR REPLACEMENTS ARE SELECTED
WITH CRANKCASE HALVES OF THE SAME CATEGORY
AND ARE FITTED WITH CATEGORY B BUSHINGS (BLUE)
Characteristic
Standard driving depth
1.35 - 1.6
Diameter of crankcase without bushing
32.953 - 32.963
Refitting the crankcase halves
- Fit the internal shield by locking the two screws
to the prescribed torque.
- Fit the oil filter fitting and tighten it to the prescri-
bed torque
- Position the oil pre-filter element as shown in the
picture.
- Place a new gasket on one of the crankcase
halves, preferably on the transmission side, to-
gether with the alignment dowels.
- Lubricate the main bushings and insert the crank-
shaft in the transmission side crankcase half.
- Reassemble both crankcase halves.
- Fit the 10 screws and tighten them to the speci-
fied torque.
- Fit a new O-ring on the pre-filter and lubricate it.
Bushing
shaft
Cat. 1 B
Cat. 2 B
Cat. 2 A
Cat. 1 C
Engine
ENG - 143