Gotcha. Didn't realize you were talking similar displacement.I didn't say same displacement. Muzzy was able to get nearly as much displacement on the 12 as he was on a bored 14. The two 12 engines I got from Muzzy were huge. When displacement was close, the 12 prevailed. Plus, the 12 had better aerodynamics. It was touted that the 12 was the first bike Kawasaki ran in a wind tunnel, although I could never get confirmation.