We recommend that you give your motorcycle a complete oil change. Contaminants held in the used oil can etch engine bearings and other vital parts as they settle over winter storage, forming a sticky film. It is best to drain the oil when it is warm and replace the oil filter. Do not store your motorcycle without oil as this could cause internal corrosion inside the engine. We recommend to use motor oil that is formulated for air-cooled motorcycle engines. If you find this information you have just read valuable, you may be interested in a report called "How to Effortlessly Protect Your Motorcycle Head to Toe During Storage". To get a copy of the free report go to http://www.motorcyclecaresecrets.com and click on the "Free Special Report" at the top of the page. Take Care, Jeff