This summer I am hopefully going to be designing and constructing an expansion chamber for my Honda PA50. I know that it would be a lot simpler to buy one, but I want the experience, and I also don't want to invest too much money into a moped that I got for free.
The one thing that I need to know to construct one is about many rpms my engine will be running, and I was wondering if anyone coulld tell be about the range of RPM's a SLIGHTLY ported PA50 would be running.
P.S.- for anyone wondering.... I am getting the formulas to calculate the size and shape of my expansion chamber from this website.... http://microcarproject.tripod.com/html/expansion_chamber_design_softwar.htm