The kymco should rev around 10K-12K........ I guess depending on this pipe. I plan to check inside the pipe at the flange, noticed my "next r" version is pretty sloppy. I plan to take a dremel to it soon and see how much better it breaths. I shaved about 2mm of a 5mm carbon ring around my gasket and that gave me a noticeable higher rpm. I will shave a little more........ shave the inside of the pipe, in the flange on the current to see how much better it flows. There are lot of small blockages currently.
I am wondering about the crank though, I've read it's good up to 10K or more, I have 6400km on it now... wonder if that pipe with a airsal aluminum 1 ring 73ccn barrel matched with a 19mm arreche carb will crash my crankshaft.
That would both suck and be a impressive display of power at the same time