TK, With the clip on the #4 position, the bike was a little boggy(rich) on the low end. #3 position leaned it out and now runs without hesitation. James Dean recommended these jets to Wayneo426 as a good place to start. I just made a few minor tweeks. The OBELN needle comes off the wr250f parts fiche. The taper of the needle is less abrupt than the YZ needle so you don't get the hit in the lower mid rpm. I'm verry happy with the way my bike runs now and have no plans to tinker with the jetting any further. Hope this helps with your decision, Bryce PS, I'm no jetting expert, I spent hours on this forum and did alot of reading. JD is from the same area as I, so I knew his advice would be good. I also talked to some kids whose friend bought JD's WR400 and said it ran perfect!