Soooooo I got this streetmate that I'm trying get 50mph (or real close atleast) with the stock cylinder. It's got the a55 homoet pipe, custom intake to match a phbg 19mm, geared at 26x22. It was going 41mph, then I ported, I cut the intake down 2.7mm and widened it 2.4mm, have not touched the exhaust port yet but plan to widen that up too once I get the proper bits for my dremel. After porting the intake I got a 3mph gain getting me to 44mph.
People have said the carb is too big, but I've tested using the stock carb (properly jetted) with the larger intake and had worse results.
Someone drop some knowledge where I should go from here. I'm thinking maybe regearing to 27x20 will get me some more topend but I'm trying to keep a little low end because I weigh 250 and the hills in Austin are not chill, but that may not be possible with this setup and I'm ok with that