Hi. I'm having a recurring intermittent issue with my battery charging system. After riding the bike on occasion the battery will be dead. I have 2 batteries on the go one of them a fancy lithium one. The bike will try to turn over but it'll be clearly stuffed. Then the second time I try to start I'll get a clicking sound. It'll push start fine but its hard to get the necessary speed with my arthritic legs. One forum suggested a blown diode? Another a complicated way of testing each wire. My cousin tested the alternator and thats fine. Your thoughts?