so I got a 99 bear tracker, its in pretty good shape but it seems like it is having carb issues. I'm not very experienced with mechanics, but I think that the carb needs to be cleaned. The bike will start fine, but it idles a little funny. Once you start going the bike kinda lurches a bit, like the idle will go down then you play with the gas and it will go back up. It sometimes will backfire when doing this. So it makes me think that the floats or something is getting stuck and the engine isn't getting gas. What do you think.