(TRAILER) full video here: Dave climbs (literally) aboard the 2018 Ducati Hypermotard 939 SP to see how it fits him, and then evaluates the suspension components & settings with 3 rider weight categories in mind.
I'd like to see the complete video, please. I have a feeling that your "use of 70% suspension" and formula does not apply to the Hypermotard front suspension. Unless your taking it off rode, but is not true in most cases. The front suspension is much taller compared to a "normal" street bike. I own a 821 Hyper SP and have used the recommendations from other videos. Although it has helped extremely with my other bikes the Hyper is a different story. I've dial in the rear but the front has way too much dive under hard braking, i.e. too much travel (even though the math is correct). I've even went as far as to pay my local track suspension tech to step it up, at my last track day. Everything is very smooth and it's controllable under these conditions, but it still feels very awkward having the front dive as much as it does. Any ideas... or maybe the full video will help????
If the forks dive you have too little preload which creates a quick structural collapse, or you have too little compression so the inertia from braking is not corrected via hydraulics that back up the spring. For any long travel suspension, 70% is a good starting point as it tries to address the brake dive issue (would be much worse at 90% as per road bikes with 5" of travel). So, if you start stiffer on these forks and you still have brake dive, set compression at 30% of the total range from maximum, and then adjust preload to 5 turns from maximum. Stiffer forks = less turn in, so then you can find a balance point. The full video is here: davemosstuning.com/2018-hypermotard-939-sp-suspension-eval/
