400ex big bore

[400ex100]

I know this has been asked before but seriously what is the best big bore for the 400 right now i am working on mine i bored it to a 426 its no problem for me to bore it again because i have assess to a boring bar for free and i can use it good so what do you think

[underpowered]

my suggestion is to search, both here and in the 400ex forum. thsi topic has been beat to death.

[prepracing]

Originally posted by underpowered
my suggestion is to search, both here and in the 400ex forum. thsi topic has been beat to death.


Yes definitly.....just an FYI, if you have already bored to a 426 thats as far as you can go on a stock sleeve. 440 requires bigger sleeve