My bike did the herky-jerky bucking this Sunday. It occurred on command after whacking open the throttle at about 5k rpm. At first, I suspected something electrical since I had just checked valve clearances and having to disconnect several in the process, two weekends ago. Well nothing there. The negative battery terminal could rotate with a bit of pressure, but not an intermittent connection. Anyway, it did run fine with partial throttle settings, so it had to be fuel related.
Then, I recalled this fuel filter clogging others have experienced. So, this afternoon off came the tank and out came the pump. Pictures are below. Some of the particles shop towel were attracted to a magnet. Others looked like white pvc plastic bits. Then, there is the black smegma.
It's all back together without any drama, and will fire it up tomorrow.
Just under 17k miles on the 2012.
I'm going to investigate an external filter. My 750turbo had that set-up OEM - including a regulator, pump, and the tank petcock. Everything was external.