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View Full Version : JE/ROSS 300ex piston



Jake250ex
04-25-2005, 10:36 AM
does anyone know if either one of the mfg's makes a high compression 11.5:1 = piston stock bore for a 300ex? if not who does, or how could I make it that high?

ethanp87
04-25-2005, 03:31 PM
i think they do but wiseco and powroll do for sure.

Jake250ex
04-27-2005, 10:36 AM
powrolls prices are sky high and wisecos advertise 11:1 but most say they test about stock....


do you guys think a .80 wiseco would make much of a diff?

ethanp87
04-27-2005, 08:34 PM
on a 300ex .80 is 298 and my .20 over 11:1 had tons of power.

Birddogg
04-27-2005, 08:44 PM
Four stroke tech has them. 11.5-1 bored 80 over runs great.