I have an 02 300ex and if I exchange a stock clutch for a Barnett clutch kit will I get more power. Thank You

 

A clutch kit will not give you more power. If the clutch in your quad is worn out (it slips under load), a clutch kit will give you more perceived power, simply because it will no longer slip under load. If your existing clutch is ok, your money is better spent elsewhere.