Sort of.
One could argue that the 1983 Yamaha RZ350 was the first production sport bike albeit without the full plastic taco body work, just a small cafe fairing but the 1984 GPZ900 Ninja was the first "big bike" of that flavor.
The earlier RD400 Daytona Special didn't have the fairing but it was pretty sporty. They were "replicating" th3 sport bikes of the day.
Those were the days, King Kenny, Mike the Bike, Spencer, Mamola, Agostini, Rainey...