Richard Moss runs a dirt track rad in his (My old) racer. I did have overheating problems years ago and even tried slight pressurisation to cope with it.
It worked, but the real problem was carb weakness. I cannot remember at this distance in time whether it was insufficient fuel flow of incorrect jetting.
Richard must be getting about 40 bhp now but runs on dope. By the by, as regards smoothness and good take off, it is standard practice for me to put a weight ring in the flywheel to increase the weight. It also reduces chain snatch and sprocket wear. Roger
