I remember seeing this bike on sbk, lovely bike, looked very much like an r1. Haga was its best rider, reason why I saved money and bought an expensive arai noriyuki haga helmet back in 2000 even though I had a Honda cbr and was a Hayden fan (r.i.p.).
My 1985 FZ-750 had the more conventional 4 carb version of this engine. I'm sure that was the first year for the 5 valve Genesis design. Eddie Lawson won the Daytona 200 on the '86 year version. Pic attached with a bonus 1975 RD-250 my first street bike.
PS I'm a long time member here even though I haven't posted in quite awhile and yes I still have my 2015 R3.