With Dr Pulley sliders, I've got 80mph indicated at 7000 revs. The rev limiter kicks in at 8700. I usually cruise around 6500 revs where the torque peak is (75mph) when I'm gonna go far away. I won't keep it over 75 for more then a few minutes. Considering that the stock bike will do over 90mph indicated, I'm not too worried about 80mph at 500 revs less then where the stock bike would be. With my huge windscreen and topcase, I often can't even rev it out to where it makes peak power (8000). Don't forget that this 300cc engine makes about the same power as 400cc scoots.