Hey guys, I'm new to the forum and just bought a 2005 450. Great bike but I like to do the maintenance myself. I did not get a manual with the bike but I really want to change the oil. I know my buddy who has a 426 had to drain it on the bottom and fill up the frame but i couldn't find any plugs in the frame. Does the oil just go in on the left side of the engine block? is there a dip stick? What kind of oil should I use (yamalube?). I would think full synthetic would be the best for the bike, 5w-40? Thanks in advance!