Well my little brother piled up his pickup and bought a car, and is moving to an apartment on the other side of the state, so I got custody of his old Yamaha. It is a 1980 DT 400. Kind of beat up, and as I recall both wheels were visibly bent, but it ran well and started without a problem. So tires, which I have covered, inner tubes, seat cover, etc are all it needs. My brother just put a new chain and sprocket on it.
I don't know that much about the bike--I did ride with my brother once and it seemed to run just fine. I'm excited to have another bike to take friends (primarily my boyfriend) riding with me!