You simply need to purchase oil filter & gaskets at a dealer and proceed. The operation is extremely simple. I would recommend you get a technical manual (easy to find on ebay) if you have any doubts. The critical part is to remember that the transmission and clutch of this motorcycle all use the same oil. If you use an oil that is too slippery (like synthetic) you clutch might not work properly. Make sure to use good quality mineral oil that is certified MOTORCYCLE GRADE and that matches the temperature range of operation.