To change the oil of a KTM Duke 390, you'll need to follow these general steps:
Gather the necessary tools and materials: You'll need a new oil filter, the appropriate amount and type of engine oil (refer to the owner's manual for specifications), a wrench or socket set, an oil catch pan, a funnel, and a clean rag.
Warm up the engine: Start the motorcycle and let it run for a few minutes. Warm oil flows more easily, making it easier to drain.
Position the motorcycle: Place the motorcycle on a center stand or use a paddock stand to ensure stability and provide access to the oil drain plug.
Locate the oil drain plug: The oil drain plug is usually located on the bottom of the engine crankcase. Consult the owner's manual or refer to the KTM service documentation for the precise location.
Prepare the oil catch pan: Position the oil catch pan under the drain plug to catch the old oil.
Remove the oil drain plug: Use a wrench or socket set to loosen and remove the drain plug. Be cautious as the oil may be hot. Allow the oil to drain completely into the catch pan.
Remove and replace the oil filter: Locate the oil filter, which is typically adjacent to the oil drain plug. Use an appropriate wrench or oil filter removal tool to loosen and remove the old oil filter. Take note of the old filter's orientation for proper installation of the new one. Apply a thin film of fresh oil to the gasket of the new oil filter, then install the new filter by hand and tighten it securely.
Install the drain plug: Once the oil has finished draining, clean the drain plug and reinstall it. Ensure it is tightened securely but avoid over-tightening, as it can damage the threads.
Refill with fresh oil: Locate the oil filler cap on the engine. Remove the cap and place a funnel in the opening. Slowly pour in the recommended amount of fresh oil, as specified in the owner's manual. It is advisable to pour in smaller amounts and check the oil level periodically to avoid overfilling.
Check the oil level: With the motorcycle upright on a level surface, insert the dipstick or use the oil level sight glass (depending on the model) to verify that the oil level is within the appropriate range. Adjust if necessary.
Clean up and dispose of the old oil: Wipe off any spilled oil and ensure the drain plug and oil filter are not leaking. Properly dispose of the used oil and filter at a recycling center or an authorized collection point.
Recap and record: Replace the oil filler cap and tighten it securely. Record the date and mileage of the oil change for future reference.
Please note that the above steps are general guidelines, and it's always recommended to consult the specific instructions provided in the KTM Duke 390 owner's manual or seek professional assistance if you're unsure.