I was lookingin the classifieds the other day and I found a bike that I would like to buy. I went andlooked at it and really liked it. The only thing is it has a stage 3 jet kit on it. Honestly, I have no idea what that is, or what it does to the bike. It sounds pretty drastic, so I thought that I would get some info on them. What exactly is it and what does it do? Is there different stages to it and what is the differenc. I know this a total newb question, but I figured I needed to know before I did anythign stupid.