So I run a simple setup, stock motorized, ngk plug, mz65 clone and nt with better air filter, with a 44t sprocket. How can I get more top end without sacrificing low end? I have tons of low end, I can go up any hill, accelerates crazy fast, but one it tops out, I'm not too happy with the speed. Any mods to get more top end out of my bike? Or for future build what would be a good all around power motor?