Background: Ive made a few threads about this bike. Ive got the carb dialed in, I have a slight back fire on decel no bog or hesitation though. I went riding saturday, rode some trails and hit the track for the first time. After a half day of riding the thing died out. It acted like it was running out of gas, I checked the tank breather, and the normal things. I rode it today around a field by my house, once it gets hot it dies when you give it gas, it will idle and die if you give it any gas above idle. I think it might be the valves, I have adjusted them and they were in spec before the last ride, its an 03 so I have a feeling it might need some head work, I did how ever look at the head and the valves appeared okay from pics I have seen on the site. Jetting is. 50 pilot 165 main. 4th clip on needle and 0-3000ft elevation im in ohio. Any things I should try to check out, I will check the valves after it cools down. But im looking for some suggestions on what could be going on.