Was searching, because I thought maybe I was missing something, but based on what you logged here, maybe I'm not. I haven't done track days since 2014, but my routine was....second weekend of year, after convincing myself the setup was crap, I'd pay the suspension guru to get me straight. Then, I'd tweak throughout the season and then the next season, blame something other than my miserable tuning, and pay suspension dude again. Fast forward to the Tenere. I have a 2018 non-ES and just spent a bunch of time trying to start the process of dialing in the suspension, as I feel like my traction on the gravel roads/jeep trails kind of sucks. My numbers are, I think, in line with what you have here, but hopefully, you'll see this and maybe tell me I'm missing something.
(Inches/mm). 7.5/191 of available travel in the rear shock. Target then is, as you mentioned, 2.25/57.3. I put it on the center stand, took panniers off (cheap aluminum Moose), left racks on (rear seat is already off) and measure bottom of axle to spot near pax grab rail at 24.4/620. Off center stand and in chock, with lovely assistant (wife who doesn't want to do this sh**) and just kept cranking and measuring and I get to 2.56/65 at max preload, which is materially off the target of 2.25 or 57.3.
Anyway, I was expecting to be able to at least get to target and then adjust, but was a little surprised (I guess, but this is the first of these types of bikes I've had since a 1989 Transalp, which was very soft) that I wouldn't be able to hit the 30% target. I'm 165 pounds and add helmet, boots, aerostitch, that I donned for the exercise. If I'm not missing anything, I'm just going to go with what you posted.