Having an issue with the battery I think. The power on the gauge is fluxuating going up and down. I know it is supposed to be around 14 when running and average of about 12 when starting. It goes up and down while riding. Then just last week my stereo screen went blank and radio is fluxing in and out, with some static coming out of the left speaker when it goes out. It comes back on if I do around 70, but goes in and out. I checked the connections on my battery and they seem to be good. Any ideas?