The oil was leaking when i bought the bike from a guy a week ago. Its not a bad leak, a few drops every hour or two. When i bought the bike it looked as if barley any oil was in it. Now that I put it on the centerstand, the oil is above the sight glass line(both of them). It looks like the oil is coming from an exaust pipe or something. Should I drain some oil from it. Also when the bike is running for a while, and I rev it up white smoke comes from the engine. Is that the leaking oil burning?