I don't know how universal this statement is, but some of the Kawasaki KZ (of the same era) models have to have the R/R (maybe stator, I don't remember.) updated as well to charge lithium properly. I have not done the switch but some of the owners on the KZ forum have had issues with lithium batteries and getting a modern replacement charging system fixed it.
Edit:
This is the thread I was thinking of.
https://kzrider.com/forum/4-electric...e-this-one-out
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1973 Fiat 124 Special
1975 Honda Civic CVCC 4spd
1981 Kawasaki KZ750E
1981 Kawasaki KZ650 CSR
1983 Kawasaki KZ1100-A3
1986 Nissan 300zx Turbo 5 spd
1995 Chevy Astro RWD (current project)
1995 Mercury Tracer
2017 Kawasaki VersysX 300
2022 Corolla Hatchback 6MT
https://www.youtube.com/channel/UC6s...LulDUQ8HMj5VKA