getting a .040 piston got some questions

[Cody_300ex]

I'm getting a .040 over and sleave/jug for my 300ex. What cc will it be now? a 298? 305? It's has 11:1 compression too.How much more power will I have? thanks

[xc400ex]

It will either be a 390 or 391...there wont be a notice in power unless your top end is wore out now and your burning oil or you are increasing the compression.

[Cody_300ex]

bump

[UglyMotha™]

Originally posted by xc400ex
It will either be a 390 or 391...there wont be a notice in power unless your top end is wore out now and your burning oil or you are increasing the compression.



390 what are you crazy, i just bought a 40 over piston for my buddies 300 the 40 over is nothing more than a clean up bore for the stock sleeve it'll put you at probably around 300 cc's now or close in there don't expect a power gain from that small of an overbore cause if you do you'll be disapointed cause its' just not there, you'll probably notice a small increase in torque though from the increased compression

[xc400ex]

oops my bad I meant 290 I dunno what I was thinkin