Hey all, I've been lurking this forum for the better part of the last 4 years and you have all helped me out with every old honda I've fixed but I'm genuinely at a loss with this overcharging problem. This is my 5th cb550 rebuild with an m-unit and a shorai lithium battery so I am familiar with how the wiring is meant to be.
Plain and simple, after riding the bike around for 10-40 minutes, its completely random, the battery will begin overcharging up to 17v sometimes.
I have rewired the bike, checked every ground, cleaned contacts, replaced the stator, replaced the battery, replaced the regulator rectifier twice. I have even directly wired the regulator rectifiers black wire directly to battery positive to assess if it wasn't "sensing" voltage properly and it still began overcharging. I really don't know what else to try now. Any advice would be helpful. Tired of having rides stop short after a half hour.
Again, it doesn't begin overcharging the battery at all until I begin riding for a while.
I have also gone through the electronics flowchart numerous times and everything checks out, both on the side of the bike and the reg/rectifiers that i have used. I have plugged the regulator rectifiers in to another bike and have had no issues.
