bored 30. over

[400ex men]

ok my 87 250x is bored 30. over what would it be now?

[LazeR]

I don't know for sure....But i htink .40 over on a 400ex. is a 406, thats 9cc gain... so its prolly like 7cc gain from whatever it starts at....i might be away off though!

Probably get more responses in the powertrain forum ;)

[derekhonda]

CC=Cubic Centimeters=Centimeters X Centimeters X Centimeters

Basically, if you know how big your bore is, and you know how long the stroke is, you should be able to figure it out.

But, if you just want a guess, its about 253 or 254 CC's now

[chucked]

3.14159 *bore^2 * stroke