Carburetor issue

Dimitar Dimitrov /

Hi dear friends! I think here are a good moped specialist users :), im cheeting with my bike, i have a problem with Piaggio Nrg 70cc, sorry about that. So, my scooter have a big big problem and i can't solved it. Last year i was driving all season with this carburater, the adjustment was very dificult for me, but i don't how i make it. In the end of season in october i broke my throtel line, than the problem starts. After replacing throtel line i opened carburater for cleaning, bye new float cap gasket....but i try for 5 days to adjustment now and it's inpossible for me. Bike starts, carburator is whit manual choke, starts, than works for a few minets, than rpm drop instant and turn of :(. So my carburetor is Dellorto 17.5 PHVA with 88 main jet and standart needle. Kit is a Dr Evolution 70cc and Leo Vince TT. Everythink was fine with this tuning parts until now :( So, what about smaller main jet ? I can't believed how is posible dificult are to adjustment this carburater. If i bye 19mm or 21 mm Dellorto ?

And some strange, the bike starts good only with fully opened rpm screw, almost to drop on the ground and mixture screw 3 times turnover ! (edited)

Re: Carburetor issue

Start by fully dismantling and cleaning your carburetor, especially the idle jet and idle passages in the carb body.

Re: Carburetor issue

Dimitar Dimitrov /

I think i found the problem. valve reeds are with no gasket, any gasket, do not exist . Good news there is high quality valve sheet Polini carbon and good valve holder, aluminium. Now i will bye gasket and i hope all to be good !

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