Dude i have been wondering this since i bought my banshee, coming from working on trucks to banshee, that's the one thing that blows my mind, is the extraem RPM these two stroke motors do, think about it at 3600 rpm the piston is going up and down at the rate of 60 times per second and at 12000 rpm the piston is coming to a complete stop at the bottem and top of the storke at a rate of 200 TIMES PER SECOND thats rediculous, plus i have been thinking about putting a tach on my banshee.