I would have the same concern as you if my bike was heating up like that. If it is a lean issue, it could be the end of that motor very quickly. Check your plugs, they will have the answer. Take pictures when you do so you can post them if you are unsure how to read them or just want another opinion.The coolant is new, and the whole system was flushed, and radiator rinsed before the new coolant was added.
I do understand that there are lots of variables - and thanx for reminding us again..., but these questions and discussions is not just a small thing, just like an engine who overheat is not a small thing. That is a massive thing, which I certainly never want.
I became concerned when I noticed my engin getting hotter on the freeway, which is not normally the case. Up to 110C..which imo is fairly hot..and then the engin seemed as if it wants to get even hotter than that... and that is why we are having this conversation, which is what one does on a form...lol.