I'm fairly confident 50k would be no issue. 100k might be stretching it, though. I have not seen any real-world data on this, but it would probably need some rework somewhere after 50k. This is pure speculation on my part based upon my (limited) experience with Kawi's twin engines (EX250, EX500, etc)
-Never mistake kindness for weakness.
-Harley Davidson rEvolution engine (V-Rod): Designed by Porsche, detuned by Harley.