I bought a used 04 warrior with Samson exhaust and k n filters under tank. Also has a power commander 3 with the 3 button . low , mid , high on it. My issue some days it runs good and others it idle high about 1300 rpm and sometimes it idle right then spit like it's on 2 plugs firing. I know it's running rich I've changed the plugs twice and there black on the ends.