Don't think I am an idiot, but after forty years of riding a two stroke this changing motor oil is new to me! I have a 2005 WR 450 F and I just performed the Engine Oil Replacement per service manual instructions. Questions: - How do you get the hose to pull off the bottom of the oil strainer? I couldn't get any leverage to pull it off, so I just backed out the strainer with the hose still attached. - I pulled the strainer out as stated in the service manual, but after that it doesn't say what to do. Am I supposed to clean it, inspect it or do you remove it just to get the last of the oil out? Is this really a needed step everytime? - Finally, do you really need to change the "plain washer" and O rings out for new ones everytime you change the oil or just inspect them and change them as needed? Please let me know and any other oil changing tips would be appreciated too! Thanks.