Sportsman first time on the track since 2010

I got my sportsman out friday night after the week before making a few laps and finding i had either a cracked piston or ring (lots of blow by). this week i installed my magnum crate engine and got some laps. Im still off on the setup, by a mile, but can keep up with the slow guys. brakes are really odd. one lap fine, next lap nothing and sometimes just for fun the right will lock up an not the left (that one REALLY sucks). I found a kink in the LF braided line so ill change that before the race in 2 weeks and bleed the heck out of them. any other ideas guys?
Author: chrisII