How does the RC 390 GP cope with long highway rides?

The KTM RC 390 GP is sporty with a track-oriented design but also used by many for trips and long commutes on the highway. It is unclear, therefore, how comfortable and performance worthy it is for longer periods on the open road. What effect does the fatiguing riding position have on fatigue over time? Is the single-cylinder engine straining at sustained high speed? And we'll look at the real experiences of other riders who’ve ridden their RC 390 GPs on longer journeys and see what they’d change about the bike for more comfortable long-distance riding and how the fuel efficiency at highway speeds compares to the KTM. This is important information for anyone who wants a sporty bike but may need to do the occasional touring.