Roy Marsh was in a race and was clocked at something like 192.xxx mph (sorry, don't have that January of 1995 Kitplanes with me, and I didn't see it on Don Reid's site). But Troy Petteway's was clocked at 196.4 at the 2007 "Performance Evaluation" competition, held at the Gathering at MVN. See http://www.krnet.org/eval_results.gif for other results. There have been very few "documented" runs involving KRs. These are the best two that I know of, although Steve Alderman (from Colorado) would be close also. Richard Shirley would probably tell you that he can do 230mph, but then he has a KR1 with a 130 hp 6 cylinder Jabiru (not that it matters), but nothing official. My guess would be that he's the fastest. His plane is the fourth picture down at http://www.krnet.org/eval_results.gif . His plane is so streamlined and optimized, it's going to be tough to top, except with more power.
Mark Langford, resident KRnet insensitive jerk N56ML "at" hiwaay.net website at http://www.N56ML.com