I am totally new to the dirt bike world. My friends ride bikes. But I prefer 4 wheels myself. Anyway, a buddy gave me a little 1979 KX80. My sister has wanted a dirt bike for awhile. Its a fixer upper. But what the hell, its free. Anyway. What are some places I can find what parts will interchange from year to year? What are good engine mods? Most of all, where can I find parts? TIA!