I am using Hero Karizma R (225cc, 5 gears). Recently I feel a missing in all gear befor 2000 RPM. Sometimes my bike turn off due to this missing. Usually it happens at 1st/2nd gears. After 2000 RPM there is no problem. I checked it in a road by riding my bike below 2000 RPM in 1st and 2nd gears and it shows missing. The problem in 3rd/4th and 5th gears are feeling while the accelerator's starting position immediatly after the gear shift.
Please let me know if i missed anything in the above descripion, so that I can update my question.