Changing the oil on a regular basis is a guaranteed way to extend the life of your bike. Doing this yourself is very rewarding and will allow you not only to save some money but give you some extra knowledge about the inter-workings of your bike.   Tools and material needed  Tools/Equipment needed:   12mm wrench to remove the oil drain plug.   Oil filter wrench (if you have your OEM filter).   17mm wrench if you have an aftermarket filter with a nut welded on top.    Oil pan or container to catch the oil.  Optional: Funnel   Optional: Measuring cup   Optional: Rear and front stands (it’s easier when the bike is straight up and leveled)   Material needed:   Shop…