hey all my name is erick, I am new to the forums. i just picked up a 2004 yz450 F and now i just have a couple of questions. I been out of the MX game for about 4 years, never owned a 4 stroke, I was a 2 stroke kind of guy, i raced an RM125. I am just wondering. I was going through the gears on the bike and it feels like it only has 4 gears is this accuarte? also what kind of oil are you guys running in this beast as i dont have an owners manual. and this being my first 4 stroke, what are the goods/bads on this bike? is it a good MX bike?