It is the rmp limiter and not a speed limiter although it is basically the same in that you can't go over 100mph. The bike feels great at 100mph. Much better than other bikes I have had. I am sure the 1800s are better with the 6th gear, but overall the Fury feels good. There is very little shaking and it just feels like a fast cruise with more wind as long as your not trying to do it in traffic.Just wondering what it's like at 100+. With the Fury's riding stance do your arms reach your ankles when you get off ?