Problem with starting my 1994 GL1500A. Kept it on a trickle charger all winter. Started it up periodically until at operating temp. Now that it's spring, took the trickle charger off. It appears the battery is not holding a charge. For example, I had to put a regular battery charger on it and start it this weekend. Rode for about an hour at speeds in excess of 50mph. Went to restart on Sunday, would not turn over without the charger on it. I put the voltmeter on it and it shows 14 (+-) amps when running. Battery is 3 years old. Installed by PO. Doesn't look like a very good one. Should I replace the battery? I tried to check for parasitic draw, but not comfortable with that process and if I'm getting accurate information. Any advice would be appreciated.