A great question/point. It makes a noticeable difference on the stick whether the front tire is off the ground or on. During a service it makes the most sense to just add 700ml and be done, but on the trail it's not so straightforward. On my last ride of 350 miles, I checked it about 150 miles in, got a reading just barely on the dipstick. It was a parking lot that at first glance appeared pretty flat but I did notice the front wheel was off the ground. So I topped it off to just below the full line. When I got home a day later I checked it in my usual parking spot in the garage where the front wheel is always on the ground, it was well over the full line.
I have 1200 miles now and just changed the oil again. I meant to add exactly 700ml and take make a mental note of where 700ml reads with the front tire off and on the ground, but forgot and just eyeballed it from the bottle with the wheel on the ground to roughly the upper fill line, so i'm back to guessing lol. Next time.
So far mine has used a little bit of oil on all my longer rides (150+ miles). My rides have included a bit of long highway and a lot of flat dirt road stretches where temps are obviously running higher, I can feel/smell it as soon as I stop after a long stretch at higher RPMs. I'm talking 40-45 mph with short bursts between 45-50, I don't rev the hell out of it, to me there is no need, its not happy there and has no more torque anyway. I'm guessing the oil use is maybe the higher temps cooking some off? and still breaking in. I just switched to Honda full synthetic after running Rotella T4 since break in. Curious to see what changes if anything. I changed it at 160 and roughly every 300 miles since. It was noticeably clearer and smelled less like fuel at the last change at 1200 miles than any of the others, so in my bike's case the rings are still seating/breaking in well into the 1k range.
Curious if other folks are experiencing the same .. or not.