I moved the clip back, but I still have the surging problem. Guessing at the exact throttle ranges, I'd say up to 1/8th throttle works just fine, then massive amounts of surging until you get to 3/4 throttle which is again, just fine.

I had hoped the issue would subside after the bike got warm (I had just woken up, cut me some slack on that gem of bad logic) but it didn't. kind of hard to drive to work in rush hour traffic using only barely open and WOT, ha ha.

Any idea what this could be? Day one, I changed out the main jet (broke the main jet extender) and moved the clip down one position. Day two, I moved the clip back up. Could I have screwed something else up here? could it be just low gas level, I'm just about ready to hit reserve in the next few miles?

Unfortunately I've got to go somewhere immediately after work on the bike and then get it home. lovely times will ensue, I'm sure.

Is it possible to need a 15 on a stock motor?