My battery is new as of last year and I kept it on a tender all winter and now the bike is having a hard time starting. Usually need to give it a jump to get it started but once it's ran for a few miles it would start no problem. But now even after being on a tender and even tried to jump the battery it won't start. The battery would read over 12 amps and it would just click. So now do I buy a battery or replace the regulator? Or is there a way to test the voltage regulator?