2024 Duke 390 with IXIL slip-on exhaust test ride 390 duke exhaust ixil ktm Jump to Latest 5.2K views 7 replies 4 participants last post by ozanarik Jan 22, 2025 If I were outfitting a Duke for offroad use with the OEM cast wheels, I would fit dual sport tires with the tallest aspect ratio possible: IE, instead of the stock 150/60/17, I would seek to fit a 150/90/17, and similarly with the front. Hi, My duke 390 currently has the stock gearing and chain (15T front, 45T rear). Being my duke is for commuting to work and not really for fun, my aim is to get to work n back cheap as I can, thus fuel economy is key for me. I am interested to know people experiance on the gearing your... Introducing PowerTRONIC FuelX Autotune 390 duke adventure390 ecu performance powertronic 1 reading Jump to Latest 17K views 29 replies 11 participants last post by racedynamics May 5, 2022
