Single phase stator with a 3 phase mosfet reg/rec?

My old yamaha two-fiddy has a 2 wire single phase alternator into a reg/rec with a ground and TWO power wires coming out.

I'd like to upgrade to the three phase mosfet, they usually have a 3 phase input that can be used with a single phase stator. Although derated a bit. Anyone had a problem with this long term?

Also, the usual reg/rec output is two wire. +-. My harness is ++- so I assume I can just splice this in without issue.

I'm just wanting the bike to charge right with an antigravity battery. Reliable a non-peak voltage charging is my goal.

Yes, it will work so long as they're both (alternator and R/R) permanent magnet compatible.

You can skip one of the input wires in the R/R with no adverse effects.