A 10W fork-oil will also work for most, I use 15W to make the damping slightly harder/slower, (barely notable in my GTR) but it may differ between oil-makes.
(I use MILLERS oils, -when the best is almost good enough…)
Old and grumpy,(?), have fairly wide engine & tuning experience, "restoring/resto-mod" on cars & mc, worked as electronic tech. (retired).
GT125R - sold. New (used): 2012-GT250R-efi (sold)+ 2017-GV-125C (sold) - got my old 2018-GT-125R back... π