The crankcase in my SCOTT IS BORN kit is a Brum item, unnumbered and apparently unused, has long carb studs to accomodate a spacer of about 3/4 in. Was this a Brum only fittment, I think I looked at every bike at the gathering, and as far as I can remember, I only found it on Brums.Does it have any effect on performance? I would like to fit one if only to make fabrication of the top cover to the crancase under the carb easier. I dont have either part, so if anyone can help I would be pleased to hear from you. Regards Dave Herbert.
Sorry Ted, don’t think you are entirely right there, some post war machines might well have a spacer for all I know but certainly my ’51 registered Shipley DPY 51xx engine’s inlet studs, (originals), are only long enough for the carburettor flange, a gasket, nuts and washers. Certain there is not enough stud length for a 3/4” spacer so maybe this is just a Birmingham thing?.
As I said in the opening message, I think I have an unnumbered crankcase which I assume to be a Brum, as the quality of the casting and the finish is not up to the Shipley standard, as I remember from the 60,s when I had both
Hi, Dave, when I said the number for a 1951 registered engine should be DPY53XX I was replying to efr215. I think he is probably correct that all postwar Shipleys were not fitted with a spacer. I would think that only the coil ignition ones had it fitted to allow room for the nice cover under the carb. all the best Ted.