anyone here have boosted a b12 to 12 psi ... im running 8 psi a ok but i am going to an event and want to kick it up... what do you think 12 or 10 psi thanks alot .... i have 450 cc 255 fuel pump and zdyne gold fuel managment so im good in that aspect and its tuned to about 11.5-12.5:1 ratio thanks

 

I hear the stock b20 sleeves are weak. I'd be careful.

 

with good tuning i wouldnt see why it would hurt.