Basically my bike has been sitting in my garage for twenty years and not being rode the whole time so I am just going through cleaning it up getting it ready to run so if you recommend certain things other than the questions I have please tell me. Is the 1982 yamaha xj 750 seca a four or two stroke? how do you change the oil and transmission fluid? Whats the gap for the spark plugs? What type of oil and tranny fluid should I use? How do I replace the oil filter? do you know of any tricky ways of getting rust out of the gas tank? Is there any way to get a free manual online, or could you scan a few pages for me? sorry there oare so many questions, i´m young and don´t have a clue,but am learning as I go. thanks for any help that you give!