Reply To: Gt125 little jump on throttle
KTM air filter ? Can you show us ? = I am suspicious on this area now.
Have you tried this mod below?
[Tutorial] How to adjust Carb Slide Needle (Tuning) – Hyosung GV & GT 125/250
Exhaust = keep the baffle inside. It will help with backpressure a little bit as vtwins need it to get goin on the lower revs, so it should smooth things out a little bit , otherwise a missing baffle makes her loud but throttle feels too harsh. (it looses the crispy feel)
Jets = It could be why the last engine died ? , I would upjet the bike , here is a tutorial below
[Tutorial] How to swap Carb Main Jets – Hyosung GV & GT 125/250