A few days ago I bought a 2001 drz250 that ran great, or so I thought. a few days later the bike would not start due to a dead battery. I bought a new battery for it the bike and when I started it the bike was idling very high, but would not hold a consistent rpm. The bike also gets hot very fast now. I have no Idea what caused this. Also when I first started the bike up it was smoking horribly but that ended after a few minutes.