My bike is fo e when riding off the battery tender but after a long ride the battery voltage will go under 12 and then it won't start and I have to push start it. I also changed the rectifier and didn't help. It's for sure a problem in the charging system and it's either a bad connection/short or the stator. Haven't dealt with it yet. For now just taking short weekend rides off the tender will have to get it taken care of and post then. Keep posting if you find anything out. They sell aftermarket stators which are a lot cheaper.