Motorcyclist magazine has an RC390 long-term test bike and Senior Road Test Editor Ari Henning is in charge of developing it. The aim is to hone the little KTM’s handling, and there’s no better way to evaluate changes than to turn some laps at the track. In this video Ari navigates Chuckwalla’s 17 turns while testing a new Andreani fork kit, new Bridgestone RS10 tires, and a prototype slipper clutch (hear it in action at 1:19). For more info on the work that’s been done to this bike, visit motorcyclistonline.com and search “RC390 long term.”