1990 Kawasaki GPX 750 R Ninja, perhaps could it be only Kawasaki Ninja 750 R in U.S. ? has NINJA written on the front oh yeah another detail, in the episode they mentioned that it's BRAND NEW so this could help with the year, perhaps 1992 ?
This livery is M.Y.1990, but my doubt is not the year. The U.S.spec version of this bike doesn't have the GPX sticker on the fairing, and I don't know if it should be named differently.