Motorcycle Maintenance and Oil Information for 2004 KTM Duke 640
Planning maintenance for the 2004 KTM Duke 640 begins with matching the lubricant to the exact engine application. Use the product listing as a reference and the manufacturer’s instructions for the correct oil-change procedure.
What type of engine oil does a 2004 KTM Duke 640 need?
The motorcycle oil listings identify 15W-50, 10W-50 as engine-oil viscosity grades. The matching product listing includes 15W-50 Synthetic Metric Motorcycle Oil, 10W-50 Synthetic Dirt Bike Oil. Confirm the manufacturer’s complete oil specification before using a listed product.

