as you have seen my posts on trying to get my yamaha 81 xs650 special 2 started, its had problems being that its been sitting for 12 years. My battery wont keep a continous charge and the battery is brand new, the alternator was alittle rusty and i tried sanding it away, and its still not putting our 13-13.5 volts when i rev it to 3k rpm. Its the PMA system worth it, cause this electrical system is really making me mad?