I got around to doing my first oils change on the Z today. The drain plugs are easy to get at the element is simple to change, but in it a royal pain getting oil back in the beast. If you try to use a normal funnel you will get oil everywhere but inside the engine! So I ran a clear plastic hose through the" air hole " on the fender into the oil box and just stuck a funnel down in the hose. Poured 2 quarts of oil and didn't spill a drop. I knew I learned something valuable in High school! i hope this somebody out!