SKEW gears are a bad way to do things There's one in a Merlin that causes engine double Mag outs and is the reason most Countries won't have Merlin engines on the civil register. The Howard Vee Motor is as rough as guts. The 600 cc Jap Motor is a Much better proposition. and they also made a Vertical twin.. I sold MY very nice Howard 2 years ago. Never left out in the Open, but still couldn't get Much for it. . Some KR racing Harley 750's have coned cams as the valves are inclined to make the Combustion chamber more compact and achieve a Higher compression ratio and better gas flow. It Puts a lot of end thrust on the camshafts. From a machining Point of view it's not difficult on a Cincinnati tool and cutter grinder. The cam profile itself is harder to do. You need a Master cam Nev