Well, we rode the 05 KX250f/K5 for the 1st time today. WOW, what a fun day. We had our CR250's with us and rode all 3. This is the 1st time for me with a K5 on a race track. I have built some CR500AF's but not with the K5 motor. The motor is sooo good. Nice smooth power with a good amount of overrev when needed. The bars we had were a tad high, so the front felt a little strange. The chassis has a great feel, turns well yet is plenty stable. We just recently sold a KX450 and the K5 was quite similar compared to the 450. Coming out of turns with a jump ahead was really easy with the extra pull over the 250's. Jetting was a little rich but should not be too difficult to get right. Next ride will have jetting changes, low bars and a few changes in the A kit suspension. Hopefully we can supply a video on the next one. Thanks for all the help with this build from this great site. Looks like the CR500AF may be in the for sale column soon.