416 piston size for 400ex?

[ZRider400]

Hey if anyone knows the size (or how much of an oversize) the piston is to make a 400ex a 416, please post it up here...

[400eXr1d3rZ]

The piston is 87mm, I think it's +3 mm bore.

[gojk]

87MM is correct. I believe it is .080 over stock.

[250X_project]

they are both right exept is is not 3mm over, it is +2mm which is .080.