2004 1200XL started backfiring very bad lost power and shut down, and finally left me on the side of the road. The battery is new this season, and fired right up before the breakdown. Now, I get no power at all; putting the key in the "on" position does absolutely nothing. No lights no gauges. It will not jump start either. If you can help Thanks. The battery test 12.78v with meter.I took the Voltage regulator off and the back is spongy and cracked.The battery cables are tight and the 6 15amp and 30amp fuses seem good. Thats all I know now.