I just bought a 93 dr 350 not the s. But the only thing is when I give it about 45% throttle it starts breaking up I was told that it's either starving or being overloaded. When I pull the choke all the way out I can get about 85% out of it. I tore it down and cleaned it out. I was told it was the air fuel mixture although I am not familiar with the mechanics of dirt bikes as this is my first one. I have been looking every where for rebuild or repair kits an so far I've only seen for the s model. So can I get some advice please and thank you. what should I do?