yz450f bogging with jd kit Guys - I'm having some jetting problems. I cleaned my carb this weekend and installed the jd jet kit on my 03 yz450. I followed the directions and installed the 170 main and the blue needle with the clip in the 4th position. It started ok, but bogged horribly anywhere past 1/4 throttle. In fact, the antifreeze was bouling out of the overflow. So, I took the 170 out to reinstall a 165. In doing so, I realized that the 170 had broken off at the threads.... I reinstalled the 165 and put the clip (on the blue needle) to the 3rd clip position. It's still bogging like crazy. I live at sea level and the temp is in the 30's. My bike did not bog at all before, it was running fine... I was just looking for a crisp response. Also, I installed the zip ty fuel screw as well. Could that be contributing to the problem? Please Help!