jlcortes take a look at the little 250 dirt bike engines of todays standard they put out quite good horsepower for there size and only rev to 13000-14000rpm.The yamaha in particular have a nice little 5 valve per cylinder arrangement that may be worth looking at.Good luck with your project and i hope you get as close as possible to the target your chasing i to have a whole lot of projects i would like to start, one being a rotary shaft to do away with all that valve gear but for the time being it will have to go on the burner as im flat out doing everybody else"s projects. |