I know we must had been crazy when we started our BSA 1928 sloper racer project about 35 years ago - we saw a photo of a sloper 1928 grass track racer with a little bit modified frame in a BSA book and we falled in love. So we build one for race tracks , we used goldie cams , a 4speed gearbox without the first gear , smaller flywheels extra oilpump driven from the magneto to drain the crankcases.... And yes after some problems we reached proved by light barrier messurement in misano italy 184 km/h with 3 gear handshifter 500ccm - the problem as to get that wide…