VESPA GT 200 Workshop Manual page 181

Vespa GT 125-200
- 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 INADE-
QUATE SPRAYING.
- Check that there are 5 closing ball joints for the operating pipes on the carburettor body.
- Check that the coupling surfaces, the tank and the diaphragm are not dented.
-Check that the depression valve housing pipe is not scratched.
- Check that the throttle valve and the shaft do not show abnormal wear.
- Check that the plunger seat does not show abnormal wear.
- Replace the carburettor in case of irregularities.
N.B.
TO AVOID DAMAGES, DO NOT INTRODUCE METAL OBJECTS IN THE ADJUSTED SECTIONS.
- Wash and blow the minimum nozzle properly and
reassemble it.
- Properly wash and blow the components of the
sprayer maximum circuit, the diffuser and the noz-
zle.
- Introduce the sprayer in the carburettor body with
the shortest cylindric part directed to the diffuser.
- Assemble the diffuser making sure the sprayer is
being adequately inserted and lock it.
-Assemble the maximum nozzle.
- Check that the tapered pin does not show signs
of wear on the sealing surfaces of the shock ab-
sorber pin and the return clamp.
- Replace the rod if worn out.
- Check that the float is not worn on the pin housing or on the contact plate with the plunger and that
there are no fuel infiltration.
- Replace it in case of anomalies.
- Assemble the float with the plunger introducing the pin on the carburettor feeding tube side.
N.B.
INTRODUCE THE RETURN SPRING ON THE FLOAT PLATE ADEQUATELY
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Engine
ENG - 181