Stop looking and reading that service built-in, it's regarding adjusting the pressure for hydraulic operated clutch, we don't have that fitted. The latest hypers do, but we don't. The translation or English isn't quite correct either. I can see where your getting confused when it says oil pressure. It should read clutch fluid pressure, but are bikes DONT have clutch fluid nor oil operated. Sort the cable out....
I'm sorry but i think that you are wrong here - the bulletin is not for hydraulic operated clutches - is specify's 2015 stradas and monsters neither of which came with hydraulic clutches.
indeed it does mention models with hydraulic clutch control, so is appropriate for both cable and hydraulic controlled clutches.
That ball and spring set up does what mentalist said. At idle and low rpm the oil pump doesnt want to waste oil pressure going to the clutch, it's not needing any lubrication. As rpm rises the oil pressure builds and compresses the spring which opens up the oil from to the wet clutch.
Mentalist is referring to the hydraulically actuated clutch. The stock 821/939 have a cable actuated clutch. The multistrada and monsters (most) use a hydraulic actuated clutch consisting of master cylinder and slave cylinder which pushes a rod down that shaft in the center of the clutch(the one that we are talking about limiting oil down with that article you have.
They also changed the clutch on the 15+ bikes. The pull pin is different which is why they mention it in the link. I believe the pin recesses into the output shaft (the same shaft that the other bikes use with the push rod setup).
Buy a cheap set of levers (amazon $30)and adjust almost all of the slack out of the cable and you will have the result you are looking for. The adjustable lever will move the lever inward while the slack is gone. I have used many levers including the cheap Amazon levers, RSC ezpull stunt set up, rizoma on the cable set up and there is definitely a sweet spot. When I switched to hydraulic all the attention needed was gone. Hydraulic adjusts itsself to constant positioning
The bulletin is for adjusting oil pressure, with a hydraulic operated clutch bike.
See attached from your bulletin. Referring to the later 939 which is hydraulic. The monster 821 was hydraulic. Is yours hydraulic NO.