graham300ex
10-27-2008, 06:02 PM
I have a 11:1 piston, hot cam stage 1, open airbox, exhaust, and jets. My fourwheeler recently has started smoking upon start up but quits after it's warm so i think it's the valve seals. I'm probably going to replace them and if I do will probably port the head. I was wondering if it is worth it and what kind of power gains are acheived. Also I will be ice racing this year so ya any comments would be great.