I have a 2004 EXC RFS. Only has 350 miles on it. It has had the 350 kit installed about 100 miles ago, and some carb work, (I think an SX needle installed, but don't remember for sure). Bike ran great, but as time went on it became harder and harder to start. Then wouldn't start at all. Since it had 350 miles I suspected valves. Adjusted the valves to .005, (I'm not a mechanic, but have done my share of motor work, although not on a KTM, pretty confident I did this correctly though). The bike still doesn't want to start. Carb is getting fuel. Spark is good, and it has a new spark plug (old plug was I nice light brown color). No visible cracks in any rubber. Any other ideas??