This is my first bike andI just bought it from a family, and they obviously didnt care about it. The gentleman informed me the air filter had not been changed since 2006. The bike wont idle, it will just die unless i give it gas. The choke is half way out and wont depress all the way. It runs fine while im riding, just cant let off gas, though I believe its running rich. I have no manual for the bike so Im kinda clueless. What kind of oil does the bike take, and what other fluid's should I change to help the bike run a little smoother? Any help you can give is very much appreciated, Thanks.