Grizzly 600 rejet?

[crazedape]

My friend has a Grizzly 600 that is all I know about it. I know how to rejet a Keihen carb but I imagine this is a mikuni carb and I want to know how to do this. Where are the jets located? He is fouling plugs and he pulls them out and they are black. I am just trying to help make his quading experience more pleasurable.

[Slinky]

before you actually rejet just pull the carb off and do a good cleaning on it. There could be something plugged. after that if he wants to rejet order up one of the power up kits for it with a K&N filter and jets. It woke my buddies 600 grizzly up, it was like riding a new quad.

[Fear-Nuttin]

Are the K&N filters okay for riding in mud? Where's the best place to get this kit?