On my bike I noticed a distinct heavy drag feeling from when I'm on the throttle to when I'm off the throttle. The best way I Can describe it is a feeling like the motor is engaging the transmission and stating to push it and then, dropping off so it not pushing it, and then you get on the throttle again and it reengages, it's like a distinct bump between going and then not going and then going again. Not sure if I'm describing this very well but are all jackpots like this or do I have something weird going on?