I have an '02 warrior that is in like new condition, i put a hmf pipe on it which it came with what i believe is the right jet, and i put a k & n filter on it. Everything is in tune except when i'm in the top end gettin on it hard she'll spit. I know it needs just one slight thing to bring everything in together. does anyone know what this may be? thanks alottt

 

Sounds lean on the top to me. Pull the choke when wide open...if it runs better your to lean for sure.