On second thoughts, you seem incorrect. All the threads I have read indicate I should have 10mm showing on my 08 R6.If you have stock, unmodified forks... the tops of the caps should be flush with the triple clamp. Im not talking about the preload caps but the part it screws into.
If you search the suspension thread there are actual #s, in mm, to start with for a baseline.
Anyone Ive seen with fork legs up above the triples has usually crashed because they over loaded the front.
If you are over 160lbs you're going to need to up the spring rate some.
On second thoughts, you seem incorrect. All the threads I have read indicate I should have 10mm showing on my 08 R6.
Phrozen's suggestion seems to be a good one to I'm guessing maintain ride height and balance front to rear.
Well I adjusted the trail. I ended up with about 523mm. It was a big adjustment for me. The bike felt like it was steering like a boat for the first two sessions until I got used to it. Running 30mm F & R Rider Sag. Stock suspension. With the adjustments I needed to take out some low speed compression on the front and a click softer on the rear rebound on my home track. It is quite bumpy and tight (2.2km).https://www.r6-forum.com/forums/56-suspension-settings/6983-recomended-settings-r6-15.html#post4868610
That should get you in the ball park for baseline settings. Then adjust from there.