I put a Lifan 125cc engine on my 1974 Honda XL70, I recently bought a used honda carb that looked like my original. I put my jets into it and for some reason it`s has twice the power now. I dont have enough road in my nieghborhood streets to top it out but I was around highway speed today. What is the maximum rpm`s the engine can take? I`m exceeding the factory specs. It gets like 2 miles per gallon now lol. It`s freaking scarey.