My battery tender lithium ion battery is on it's way. My build is almost done. Weld up the new exhaust, finish under seat tray and tidy up wiring. I tried researching what regulator rectifier to get but the deeper i go down that rabbit hole the more lost I get. Most stuff is talked about the xs650 which doesn't help much. And the prices are all over the place. My bike is a 3W5 serial bike. That makes it a 1980 bike even though I was told it was 1982 when I got it. It has the 3 white wires from the stator as shown in the photo. I hear the caltric one from amazon can work? I'm a bit dubious about the mixed reviews, but some guys just like to hate on that stuff. I read it has a 1 year warranty? If I have to I will spend the $100+ dollars to get one up here in canada from mikes xs or wherever. What I'm looking fro from you xs400 ninjas is what solid state regulator rectifier i need so i can get this little fun cycle going and have no problems with overcharging,. Running LED lights almost everywhere.