FuelX Plug-in fuel-injection optimizer, autotunes the engine to best operational parameters, constantly monitoring, learning, and adapting to the engine condition, wear and tear, riding style, add-ons (such as air filter and/or exhaust), etc FuelX Also auto adapts to the environmental... 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 On the KTM 390 Duke , there are several small pressed-in plugs used to seal oil drill-through passages after machining. A common location for a failure is the front of the engine, near the camshaft oil supply or main oil gallery feeding the crankshaft. 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...