4??ex

[rooster_20]

I just had my motor redone and he bored it .10 over what does that make my 400ex a 406 or somthin just wonderin thanks!

[400exrider707]

.040 is a 406.


Yours is a 399.556;)

[rooster_20]

Thanks man I didnt want him to bore it out alot incase it blows again. How much over is a 416?

[rooster_20]

so 416 is .60 over? and 426 is .80 over?

[400exrider707]

406 is .040 over, 416 is .080 over 426 is .120 over.

Every .020" over is roughly equal to .5mm

so if you have a .010 over you would have an 85.25mm piston.