I have a 2007 RMZ450 but unfortunately I don't have the owners manual. Hence the dumb questions I'm about to ask. The engine/transmission oil is all one correct? It's not separate like on a Honda. Secondly, to drain the oil, do I just undo the two bolts underneath the shifter? There is a big bolt and a smaller bolt. Thirdly, does anyone have any recommondations for the oil? And what amount do I need to put back in it? Much appreciated if anyone can help!