piaggio zip top speed

The 12mm carbs are crap! That's why the brass plate etc is there for to restrict it to a 12mm.

 

It slightly restricts it + I heard all it did was restrict a 17.5 carb to the 12mm carb by using brass plate + tha arm in the air box

 

the carb i have is stamped 12 not a 17.5 with a restricting plate fitted do the 12mm carbs come with bigger main jets than the 17.5 or am i better just to replace the carb

 

My zip ive just got it back on road and ive been clocked doing around 60-65 by few mates in theyre cars i know its not accurate but its theyre abouts 60ish and my zip is 50cc and has 21mm carb, variator, pipe and set up perfect.

 

Well I've had 60 out of mine duggie and that's with a 70cc kit + gear up etc, and how's it setup?

 

mine will do 35mph with a standard 12mm carb and washer removed anyone know the standard jet sizes on a 17.5 carb

 

Standard is 53 deristricted 56 but I'd just remover brass plate + sleeve from air box and put a 60 main jet with standard exhaust and 63 - 66 main jet for a deristricted sports pipe

 

just had another go on my friends totally standard aircooled zip it wheelies really easily and does 55mph on the level, my mk1 zip has the exhaust de restricted and the washer removed and the most i can get it to do is 42mph plus theres not a chance it could ever wheelie is the 12mm carb restricting it this much or is there any other restriction i have missed ,