all u guys complaining about parts availability don't know how to use the interweb, all the shits out there u just have to look for it, and yes its gonna cost more $$$$, also u can make anything work!!! put a fucking polini on a moby... just do it, get the local machinist to re press ur crank and shit or machine an av10 kit to have an intake.
tommys right bolt on power is easy with a moby, provided u have the parts and KNOW HOW TO USE THEM!!!! god i can't stress that enough. working in a moped repair shop has made me lose faith in other ppls ability to build solid bikes. I have seen the jankyest shit u wouldn't belive.
building a fast puch no easier either, i made one, its not the fastest puch but its pretty good for my 1st one, yeah it was hella cheap and cost me around $500 for the whole thing but i got alot of free parts too, the other thing to note about fast puchs is there are alot of "fast puchs" and only a handful, of FAST PUCHS and making the latter is alot harder.
don't believe everything u hear in the internet kids. mobys r easy if u know what to do.
ps red twizzler belts suck balls, just thought i'd trow that out there, so don't waste ur $$$ fast mobys just got cheaper.