Just got back from sand mountain. The ten paddle is the way to go. it pulled just fine and was easy to spin. It was really cold up there (below 20 degrees at night) so my jetting was on the lean side. Anyway, I was able to beat most slightly modded 450 quads and banshees up the hill. I even beat a 426 with my stock 450. Alright back to my question. We pulled my carb apart to adjust the needle but it was nonadjustable so we just put it back in and noticed that the throttle stop was cut so much that it just blocks dirt in there. Is it okay that it doesnt stop anything? Also, is there a difference in size with the yz needle? Any help would be nice, thanks.