Bike Is Jerking Around 3.5k-4.5k Rpms

[HoseIRMC]

Just as the title says, my 01 busa is really jerky around 3.5-4.5 RPMs. At first I thought it could be a transmission. Then, well maybe its my clutch. I don't really have any clue what it could be. I've been told maybe its even the ECU but I'm not sure. I do know that I didn't have that problem before I had the piston rings swapped at my local shop but IDT that is it.

 

[MC MUSTANG]

Does the engine hesitate when revving or only while moving? How many miles? Does it feel like it could possible have a cylinder missing? The only time that I ever felt my 01 act jerky, I went to do a TB sync and noticed I had a damaged coil -

 

[twotonevert]

Hard diagnose with information provided. Could be a simple issue and it may not be, but always start from the last thing you changed before you had an issue. Sounds like from what you provided, reassembly has caused a problem. My guess would be electrical or fuel. Is it burning a lot of oil? Do all cylinders have consistant compression?

 

[dadofthree]

Given the information provided, I would assume something happened when you had the work done