I havnt driven a honda with IRS but between the steering lock, the heavy fuel consumption, gearbox problems and the locating pin snapping we really arnt impressed, we thought it was “acceptable” but far from ideal, I asked for the yam 450 on demo and it was leaps ahead in every way!
I might have to try one I've never really been a big Yammy fan! Might as well go for a 700 though! I'll be honest that 420 Hondas almost put me off them altogether but the 500 IRS is a very different bike. The fuel consumption is really good I've never had a problem with the manual box unfortunately the turning circle still ain't great!