Here is the story of my troubles. I bought a 98 fourtrax 300fw about a week ago, it was not running when i bought it but was used all winter to plow snow and had been running within the month. It came with a broken starter valve in the carb and a broken exhaust flange bolt so it has an exhaust leak from the head. So I brought the atv home and cleaned the carb and put new jets, needles and gasket/o rings in it. New spark plug and now she will fire but wont idle just dies immediatly, cant get her to run at all. The starter valve is 50$ and i dont want to buy it until I know if the atv runs, I dont have the money to spare right now. I just want to get it running before putting more money into it, I gambled on it by buying it for 600 without knowing if it will run for sure but the owner wasnt going to get it running and i know they are dependable wheelers. I already made sure the vents were clear and the tank is vented. If anyone has some ideas i would be greatful for the input.