I have reason to believe that my tank has build up in it from sitting for quite some time. How do you go about cleaning it out and what products are reccomended. Also once I get the tank cleaned and put back together I want to store the bike because it is going to get too cold to ride. Should I fill it up and use a stabilizer or I have heard about emptying the tank and coating with oil? What options are there, I'll listen to anything. This is my first bike and I'm not sure how to "put it away for the winter ".