My brother just bought a 1990 Yamaha Warrior off Craigslist. I've never owned a quad and have no experience with them. So, what can you guys tell me about this quad? Reliable? Easy to work on? Fast? Whatever else would be appreciated. It needs a main bearing and my brother said they cost $60, so he may have gotten a decent deal. I looked on KBB and it said a dealer asking price was $1335. What do these go for usually? Thanks!