U wanna cruise at 180.without refuelling for 300-400km?

A versys 1000 when ridden sensibly can get about 300+km a tank.....but at 180kmh....highly unlikely. I doubt any bike can do that.....better bring ur expectations back to the ground.

The closest thing u can probably get to achieving that is MAYBE the BMW GSA series with its 30L fuel tank. Even then i highly doubt it can reach 400km/tank when cruising at 180kmh