VESPA GT 200 Workshop Manual page 205

- Check that on the carburetor there are five ball bearing seals pressed into the holes
machined in the carburetor body.
Check that the two mating surfaces, between the float bowl and the diaphragm, are
-
unblemished.
- Check the butterfly valve and control arm.
- Check that the float valve housing channel shows no signs of scoring.
Check that the valve seat shows no signs of abnormal or excessive wear.
-
- If any of the above defects are observed, replace the carburetor with a new one.
Note: Do not insert metal tools or instruments into the calibrated jets as these can cause
damage and alter the carburetion.
- Thoroughly clean and blow the slow-running jet
and re-fit it.
- Thoroughly clean and blow the main supply
circuit components, the atomizer, the emulsion
jet and the main jet.
- Insert the atomizer into the carburetor body
with the shorter, cylindrical part facing the
emulsifier.
- Re-fit the emulsion jet, ensuring the atomizer is
correctly located, and tighten.
- Re-fit the main jet.
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