300_dude
01-26-2007, 09:31 PM
I would like to install a high comp. piston on my 300ex I know the best thing would be a 400ex but in the meantime..... can anyone tell me maybe exactly what needs to be done as far as what size piston I need to buy. I do a lil bit of everything. trails, jump ramps ride around, and sometimes race. so there is an idea of what I do and maybe what size piston I need. should I stick with stock bore or is it that as soon as you upgrade your piston you have to change the bore? I have jet kit, aftermarket exhaust and header, aftermarket rev box, monster ignition coil, k&n filter air box lid off. any comments will be greatly appreciated