I've been working on eliminating the exhaust popping on my 00 YZ426 during deceleration. I opened the pilot jet screw from 1 & 3/4 to 2 & 1/4 and the popping no longer occurs at very low deceleration speeds. Now when I am running at high speed and I chop the throttle I don't get the popping right away, instead it will occur in the middle speed range. I assume this is caused my my jet needle being too lean. I purchased the 01 modle jet needle some time back per the recommendations from this board and DRN, but I haven't installed it yet. The only differene in the 01 needle is the taper diameter makes it a richer needle than the 00. I looking on recommendations on what to try next. Should I lower the clip on my 00 needle to make it richer, or should I just install the 01 needle at the stock position since it is a richer needle ?? Which will make more difference ?