Well, one thing you might do is ensure the system is as full as it can be. If there's quite a bit of air in there it allows for expansion and thus higher temps. Kevlar had the most routine suggestions.
So here's an idea I really hate to suggest. On my old car, the coolant temps would go very high. Turns out that the exhaust header gasket was leaking into my coolant, effectively blowing exhaust gases into the cooling system. Now its not clear to me that's a possibility with a bike. What I'd expect to see is that after getting the bike nice and hot if you come to a stop the temp should rise pretty darn quickly. Any dealer should be able to do a test to determine this, or if you're handy you could do it yourself. Drain the system, pressurize it and monitor the pressure for any loss.
Dragging knee is for the track, and dragging tail is for the lot. --Kane Friesen
When you're in a car, you're watching a movie; when you're on a bike, you're in the movie. --Robert Pirsig
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