The only thing I know is they are between 2 and 2.75hp but I wanted to know in which RPM they have most power and the max rpm especially compared to the 9HP KTM engines.
They don't compare to name-brand engines. These are cheap engines for a reason. Don't go thinking you're going to end up with dirt-bike performance from a $70 engine. Stop worrying about specs and start worrying about what's important to you:
Performance and quality, thats why I will get a KTM engine. But until then I want to ride the old China engine and want to know especially some info about RPM specs. They are pretty powerful for how simple and cheap they are.
Howdy Lowrider. Great question. Be really cool if some one with the tools and ability could make a performance graph. As Joe said they vary a lot! But a basic graph as a guide line to them would be good to have.
(I used to live in Puerto Nuevo. Man, that has to be MB heaven!)