When I bought the bike it started up fine (after using a battery charger and putting about two quarts of oil in it) and rode to my house fine. The bike has been sitting in a shed for a few years, pretty much only being started 1 or 2 times a year. Once I got it home I went and get a new battery and it started just fine. When I started it, it ran fine for about a minute or two and thats when it started backfiring and smoking. I turned it off and thats when the oil started leaking from it. Like I said, I dont know very much about bikes, this being my first bike and all, so sorry about the lack of info im able to provide.