simoninis come with a restrictor fully welded in has anyone who uses one removed this??? u would have to brake one of the header welds and reweld it on the outside to fix it. super lame.
as for a doppler on a puch think about it this way, u would have to make sure u don't mess with the tuned lenght too much when u convert the header, also not that the headers on all the good french pipes are tapered (not so on most puch pipes) and if u hack this and put in a non tapered header section its a complete waste of time the tapered header is half of what makes a pipe like this rock. wider powerband and the ability to wind out far past peak HP and rpm to take advantage of tailwinds/drafting etc.
brandon i'm actually having amazing sucess with a techno boss belive it or not on my puch polini with a 4 pedal boysen setup.
i think if u want to convert the dopper u should do some math b4 u waste ur $$$$, is it more worth it to just go french.
i built this puch last week it shreds hard, but still doesn't stand up to my yellow moby, never underestimate the power of the darkside.
this rat bike hits almost 50mph with a 16mm sha on a 13.5mm piston port intake and a 62cc kit and out accelerates/out tops/out hill climbs most puch polini setups (even 2 speeds) with 15 bings, smooth power everywhere and never brakes down or siezes its abused and daily driven, its just better.