Guess we will see.
I basically hard broke mine in. Been de-restricted and full throttle on streets since day one after I bought it and only difference between mine and his is I didn't change oil in first 20 miles, but by 300km.
And I have been using synthetic for about last 3 or 4 changes and I am at 3800km I change between 750km and 1000km. basically once a month for me around mid month. No issues thus far. (knock on wood)
as for speed, without any changes other than derestriction, I get to 35mph relatively easily, minus the normal slowness from about 20 to 30mph where it feels like it "shifts" so to say. and average 38 to 41mph on flats. Again this is without variator or roller changes. just de-restriction from dealer. I don't even know if it has a smooth drive boss.
And when I checked spark plug a few oil changes ago it was a nice tan color. not burnt and not oiled over.