That's what I'd figured. You would be pleasantly suruprised (probably dis appointed) how much power those big tire kits eat up. Shoot I've seen a 240 kit on a gen 1 take almost 15hp, so think about what a 330 would do, specially if it's the type that requires 2 chains.
Run it on the dyno before the turbo since you got numbers before the fat tire kit and you'll know exactly how much it's robbing. I'd be willing to bet 15-20hp.
That being said an Rcc stage 1 kit for a gen 2 bike makes 230hp. So figure yours will make around 210-215.