Although the newer 100cc engines and FA/FSA/ICA engine are air cooled, there’s a big gap in the stresses between a KA and the FA/FSA engines of the late 90’s.
Much higher power output and peak RPM put the FA engines a lot closer to mechanical and thermal failure on a regular basis. Choking was more for preservation than performance. Although you’ll catch some commentators getting this wrong in video coverage from the time.