I just bought a CRF250R. I rode three days. Day one, I burnt a tank of gas to break in the motor. Then, rode second day and had problems starting it after it was idleing and stalled during warm up. Day 3, the motor ran well and no problems. Then on the 4th day I had alot of problems starting it, after kicking for a while and leaving it sit, I finally got it started. I dont no why it is so hard to start sometimes. I dont think it is a valve problem since it is so new. It's almost like the carb floods easy. I still have stock settings. Any suggestions?