Bike stuttering at constant speeds

[pintail120]

Hi,
did you solve this in the end ?
I had all the same symptoms, I used a special tool to enable the DTC codes using MIL
it flashed out X1 long and X2 short which indicated fuel injection
I flushed the tank clean, took out the injector and used a compressor to clean it out, bike pulls like a train after this, but not sure if this fixed it as I also swapped out the sparkplug at the same time, had done 34k miles on the plug.

[Hobbit112]

I am also experiencing the same or similar issue. To me it feels like it goes to the rich side and then corrects when throttle twisted.

Have changed out injector (twice) and still same issue. Have installed new air filter, spark plug, fuel line. Same. Will try new fuel filter.

Next step I am considering is replacing the TPS sensor.

FYI, recently had a Yuminashi 164cc bore kit installed with old TPS sensor installed on new throttle body.