Ok so last month I jumped the gun and did "daves mod" without haveing the jet kit in... I then was called and told it was back ordered so I ran without changing the jet and needle until last night. Now here's my issue... I put the new jet in, .64 i Think it was... And the Dyno jet Needle went in no worries, I had to put the clip on the "third grove" any how... I do the work, put my back back together, and it sucked! My bike ran like shit. It idled fine, and was ok to about 2800 rpms then it was "starving" or flooding and just bogged. At first I thought I got dirt in a jet or something but that didn't make sense. the weird thing was it seemed intermitten.. Sometimes I had some kick ass power and then sometimes not. But then I had a FEW BACKFIRES, not pop's but BACKFIRES.. I went home took the Dyno jet needle out put my Stock needle and dave mod set up with the washer back in and now my bike runs WIKKED!!, Yes I did make sure my mixture screw was right. Now I did compare the needles, ans I noticed that the Dyno Needle was about a full centimeter longer...What have I done? is having the stock needle and dyno jet jet going to make any problems? I can use the dynojet needle but I would have to cut off some length at the fat end, (top) to make it work... Does anyone else know what is going on? why that needle is long? or *** happened?