PavelZ

I have ECU flashed. It fixed the problem for a while. After 1.000 km all the issues are back. I will give the service the second try ...

I have noticed that the jerky throttle response occurs only when the engine is below 5.000 RPM (most often between 3.000 a 4.000). I have read the service manual and it says that every service check the throttle body syncronization should be done. I doubt that the service does that. I have schedulled inspection for throttle body cleaning and hopefully synchronization as well. I will see if it helps.

I have similar problem on my Tracer 9 2021. It started after 18.000 km. When starting the engine in cold weather about 15 °C and slightly open the throttle the engine has tendency to stall. The other issue is when slowly accelerating and closing throttle a bit it jerks or vibrate. And yesterday I lost the throttle during ride. I had to stop turn the engine off. After few minutes it was ok.