I just got this bike a couple weeks ago after it had been sitting in a garage for a year and a half to two years. Put in new battery and it would turn over and stay started for maybe two or three seconds and then stall. It still had the old gas in it(a little less than a gallon) so I mixed in a fresh gallon of gas and now it won't even start up. 'm thinking it's the carburetor but as I'm a newb to bikes I'm not exactly sure what to do or where the carb actually is. Could someone please give me some suggestions?