Has anyone experienced a mid throttle burble. It only happens at mid throttle and in mid RPMs usually without much load on the engine, like when running down the road. The rest of the time the bike is great, starts easy and pull all the way through with no problem. I am assuming this is some kinda of jetting problem but everywhere else it runs so good. I also tried yz timing without changing any jetting and the bike would start missing and popping by about 5000 RPM. Not wanting to go through rejeting the whole damn thing I just switched it back to WR timing, I have been happy there anyways. Before anyone asks, I have already double checked the timing to make sure it is correct.