Hi Ric,
only driving on LPG the jet and needle (and piston) in the carb aren't functional (they could be removed from the carb if never driving on petrol). So no special needle and jet is used for LPG. But driving on LPG results in a clearly quicker as normal wearing of needle and jet (no fuel flow seperating them from each other). The gap between them eventually will get way out of the gap needed for petrol driving and results in a very high petrol use, not having to use the choke and bad starting hot on petrol (too rich).
So rebuilding the carb (at least new jet and needle, and I assume also the throtle valve axle and bearings) will have to be done.
succes,
nullifie
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