Rebuild

[slowredcoupe]

I HAVE A 96 FOREMAN 400 NEEDS TOP END THE STOCK PISTON SIZE IS 87MM MY QUESTION IS CAN I BORE IT OUT TO A 450 STOCK PISTON WHICH IS 90MM AND USE SAME VALVES HEAD ETC LMK IF NOT ANY SUGGESTIONS ONLY SIZE PISTON FOUND WAS 88MM

[pro-rider46]

i would just get it bored out to a 88mm, and through that in. its not like its going to be a racer.

if i guessed the stroke right it will be a 407cc.