Well I only got to ride my yz450f twice since I got it (its getting cold here in MN) and tried changing the oil. I need tips from those of you who have one. I drained the oil from the frame and engine but couldn't get to the other smaller (8mm bolt) drain next to the 12mm bolt drain under the engine. What do you use to get to the little bolt? Also, I couldn't disconnect the oil hose, do you have to take off the water pump guard? Is there a trick to it? I also couldn't get the frame bolt/filter off? It wouldn't turn at all...how do you guys get it off? I was told to make sure you clean that out. The oil filter went in easy. It cost $10, is there any other filter that works good and is cheaper? Any filter to definately NOT put in? Any oil recommendations--i got the Yammalube 10W30 for the colder weather??? Thanks for any help.