To change the motor oil of a KTM Super Duke, make sure you have the right recommended oil and a container to collect the old oil. Place the motorcycle on a stable surface, preferably on a rear stand for added safety. Start the engine and let it run for a few minutes to warm up the oil, making the draining process more efficient. Turn off the engine and locate the oil drain plug located under the engine. Place the container under the plug to collect the old oil. Use a wrench to loosen the drain plug and be careful, as the oil may be hot. Let all the oil drain into the container. Once the oil has stopped dripping, clean the drain plug and replace the gasket if necessary. Reinsert and tighten the drain plug with the wrench, being careful not to over tighten. Find the oil filler cap, usually located on the side of the engine. Remove the cap and use a funnel to slowly pour the new oil into the engine, following the specified quantity in the user manual. After filling the engine with the correct amount of oil, replace the filler cap and make sure it is securely tightened. Start the engine and let it run for a few minutes, checking for any oil leaks. Turn off the engine and let it rest for a few minutes, then check the oil level again to ensure it is correct. Remember to dispose of the old oil in accordance with local regulations, taking it to a recycling center or an authorized workshop. This procedure will ensure that the engine of your KTM Super Duke operates efficiently and lasts a long time.