Just picked up an 07 450, noticed there was an issue at steady throttle, there was a spot about 1/4 - 1/3 into a slow roll on that was quite rough. After posting in the jetting section and getting feedback from Eddie I switched the 45 pilot to a 42 pilot and that reduced the problem significantly. There is still a spot in the same place in the throttle that seemed as if someone just cuts out the spark for a split second then its smooth sailing. Just to see what would happen, I unplugged the TPS and that spot went away immediatly. What does that point to. Do I need a new TPS, new CDI?? The bike has 30 min on it around my subdivision so if there is a major issue I can drag it back to the dealer but if its just some minor wrenching I'd preffer to do it myself. My 04 YZF 250 never had an issue and the TPS is still connected. Ideas??