25-06-2020, 05:33 PM
Thanks for that, David. The reason I asked was that my RP should have a bolt down crankcase, but the current engine is a bitsa, with a low frame crankcase dated 1935 (M238xxx) I do however have a spare case from 1933. It's got the rubber mountings but the narrower drillings. It has an engine number at M181xxx so it must be one of the early ones as I reckon it's from September 1933. It was only when I was checking the case over that I noticed the difference in the diameters on the feet.