How much horsepower does it take to haul ass? Evidently 43 hp is plenty! In this video from Sonoma Raceway, Motorcyclist magazine’s Senior Road Test Editor Ari Henning takes his KTM RC390 project bike from a fourth-row start to first place, and sets a track record for the Lightweight Twins class in the process. To learn more about this bike’s journey from daily commuter to championship-winning racebike, visit www.motorcyclistonline.com.