[HKS PWR]

Nope, don't think Ben Johnson could have done it without doping. He always had a strong start/good reaction, but Carl Lewis, on the other hand, was more a "complete" sprinter. Lewis had decent starts but more importantly he had the power and endurance to catch and pass Ben Johnson to win a race. That was, until Ben Johnson started doping. In the video you've posted, Johnson had already been doping for a few years (started doping sometime after 1984 Olympics where he got a bronze medal, behind Lewis' gold).