Piston=Bore chart.

[brodzowski]

Forum is kinda quiet today. I thought I'd ask a question that I couldn't figure out how to search.
I was thinking...wouldn't it be cool if someone had a chart that showed what overbore piston size=the cc size. And then I thought, surely someone here has that info.

416, 426, 440 etc...anyone have wiseco numbers? Charts? Anything? Just curious and good info.

[03pete]

I was also currious about this and the lt250r. I plan on boring it out very soon and i was wondering what CC it will be at when its all said and done. I know there is a equation like

bore X bore X stroke X .7854 = (pi * radius^2) * stroke = CC displacement

[honda400ex2003]

heres the 400ex

397 - 85mm
402-85.5mm
406-86mm
416-87mm
426-88mm
440-89mm

There you go, not sure what the .5's are since they are just rings for most of them. They are to just clean up the cylinder. These are the common sizes. with a +4mm stroke addition it changes them by 20CC to the better. This is using a hotrods crank. That would make a 440 a 460 with the stroker. and each the same i believe, steve