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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. 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. Potential 390 Duke owner here. I'm being told its a good thing to have a small displacement bike to sharpen track skills. I've sat on the Z400, Ninja 400, RC390 and the 390 Duke . Out of those, I preferred the 390 Duke . But I'm wondering how well they do on the track compared to other... Version 3.0 PowerTronic for 2017-2019 390 Duke . Used for ~3 years, total mileage of ~1200 miles. Worked great, sold the bike so parting out. All original...
