I'm running a k&n air filter, dyno jet kit, and a HMF slip-on......what should my jet setting's be?

 

If your plug is a nice light brown and you don't have any hesitating or bogs I wouldn't rejet. The grizzly's usually come running a little rich from factory.

 

I would definitely rejet. No way your grizz is coming that lean from the factory. I use 155 main, 4rth clip on the needle, and I think 3.25 turns out on the mixture screw. Works good for my altitude. Don't know about yours.