I was wondering what is the best carburetor for a 78 Motobecane Mobylette I was gonna go with a SHA 15.15 but i heard there are better carbs for it. also was wondering weather, the arisal 70cc kit or the 70cc parmakit and is it compatable just bolt on or are there some issues. P.S. i have a av7 crankcase if that helps. Also is it alright for the head from a 50cc good for the body of a 70cc kit?