For what it's worth, here is my experience with a 2016 4RT260. I did the first engine and gear oil change at 8 hours. Couldn't find Elf anywhere so I bought Belray 75W Gear Saver.
It turned the clutch into a light switch. What used to be super smooth and with a nice easy transition between engaged and disengaged became very abrupt and hard to control.
Then, thanks to the forum, I asked my local Honda dealer if they could order Honda part no. 08C35-HTX-740. He had no idea what it was but he tried and a week later he got it, it's in the bike and the clutch is back to the way it was.
The downside? It's insanely expensive. Almost $60 per liter. I bought 2 bottles. Oh well. I plan to change at 30 hours intervals.
