piston ???????????????????

[400exkid05]

hi... i was wondering if any piston company made a 426cc for the 400ex in a 12:1 compresssion

[bwamos]

Why 12:1 ?

You have to run race fuel with that.. so if your going 12:1 you may as well go with the 12.5:1.

If you want to run pump, you need around 11:1 on an air cooled motor.

[400exkid05]

it dosent matter ill run race fuel just does any one sale a 12 compression ratio