VESPA GT 200 Workshop Manual page 177

Vespa GT 125-200
Kehin
- Before refitting, wash the carburettor body accu-
rately with petrol and compressed air.
- Pay special attention to the fuel supply pipe and
the plunger seat.
- For maximum circuit, check the air adjustment is
correct as shown in the figure.
- For the minimum circuit, make sure the following
points are properly cleaned: air gauging, outlet
section controlled by flow screw, progression
holes near the throttle valve.
- For the starter circuit, blow the connection pipe properly with the jet. This is necessary because the
nozzle support hides other inaccessible internal calibrations.
- Blow the intake nozzle properly.
N.B.
THE ACCELERATION NOZZLE OUTLET IS EXTREMELY SMALL AND IS ORIENTED TO THE
THROTTLE VALVE. NOZZLE INCORRECT ORIENTATION RESULTS IN INADEQUATE SPRAY-
ING.
- Check that there are 5 closing ball joints for the operating pipes on the carburettor body.
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ENG - 177