I just bought a new 04 450F. Great bike. The dealer cannot jet, etc. I am at 5000ft. and have the pilot and main jets dialed in. On the needle at 1/4 throttle it is very rich. However, above 1/4 throttle, it is ok. I tried stock needle at stock clip. Then went 1 clip lean wich was better. There was no difference between clip postions 3,2, and 1 (all the way up or needle all the way down lean). It is just this one spot at 1/4 throttle especially in 1st gear that the bike doesn't run steady and the power jerks. It is definitely a rich condition. I am thinking of going with a leaner needle on the shaft or daimeter since the manual says the shaft affects throttle from 1/8 to 1/4 while the clip affects 1/8 to 3/4. Any suggestions?