2017 KTM 500 EXC-F: Uncorked and Retuned. by Pete on September 20, 2017. There is no doubt that the 2017 KTM 500 EXC-F is one of the most powerful and best performing dual sport bikes on the market right now. Even right out of the box it blows away the competition with it’s 62 horsepower. The crazy thing is, there is even more power to be had Di4DG.