I have a 2005 Sportster XL883L, it´s sputtering when you give it gas and try to go. It´s gotten worse and now when you twist the throttle it just sputters and pops. Any ideas as to the problem? I moved from Michigan to Oregon last year and had no problems. After storing it for the winter I got it out, prepped it, drove it for a while, and now it´s crapping out?