I need to put more miles on mine before I make a change. I'm planning a trip out to Denver this coming summer, and the Midwest highway speeds are 70mph and up. That feels like a strain on this bike compared to my VFR. But I also will try to avoid highways when I can. I won't be in any rush.
I've done a few 1,000km days on my bike, and it will handle sitting on 120km/h (about 74mph) or higher just fine. Yes, it revs higher and I've noticed that more since I've bought a Triumph Sprint GT (twice the engine), but I honestly don't think that the bike is strained at those speeds. I have toyed with the idea of increasing the gearing, and while that would probably be nice, I've not been driven to do so because of problems.
In fact, I'm tossing up whether to take the X or the Triumph on my Christmas trip back home (for me, I can strap a swag / sleeping roll more easily to the X, which with the upright seating position gives me a backrest that might make for a more comfortable long trip). Having said that, I do have a new toy and I'm not riding my X much at the moment.
