I'm trying to find jetting formula for a Raptor. It has K&N air filter, stock pipe w/ out baffle, and 2" hole in airbox lid. I have a 155 and a 160 main jet. It seems to be running a little lean and I've blown holes in two intake manifolds. I assume b/c it's running too hot. If someone has the same mods, or knows about carb jetting, please help. Thanks.

~Dan