I'm looking for improving my top end on my 87 trx 250x. It has 12 to 1 compression piston, bored 20 over has FmF power core exhaust, runs on racing fuel, and has a k&n air filter. I'm thinking about changing cams and valve springs would this bring much improvement to the top end. Also is there anything else that i can do to my machine?[img]i/expressions/face-icon-small-cool.gif[/img]