PS: Japanese dudes seem to convert these to 12v with just a 12v battery, 12v reg/rec from a different Yamaha and a 12v flasher relay.
they also got some rad color schemes over there
I've also come across an aftermarket CDI box, but hard to tell if it does much more than remove a limiter since these might have been restricted in Japan? Hard to work out from translate.
There's a shit ton of parts on YAJ as well, and there's plenty of car parts importer dudes/services out there if you need something you can't find stateside.