Hello !
The R65 I own is used for commuting to work (around 8km, give or take, mostly in town ) and did so for the last 25 + years.
Still has the original charging system which is fine. The flooded batteries ran for around 3 years (more if pricey, less if cheap chinese) and the AGM is good for a year or two more.
So your charging system is fine for your bike...