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« on: 22 February, 2024, 19:20:53 »
Parts do come up occasionally, an oil tank and a cylinder head were on a well known auction site until very recently, just keep an eye out.
The B24/25/26 cylinder head is the same for all three models, but for the three years of production,37-39 there were changes to it for each year, although these are nothing to prevent earlier or later heads being fitted. From 1938 two extra lugs connecting to the rockerbox were added. For 1939 a completely new casting with deeper finning was used. Can't think of a head from a different model which would go straight on.
The oil tank was the same for 37/38 but changed for 1939 to the M series shape tank, which I believe would fit the '39 B models as the mounting points are the same.
Forks were specific to B series. M series girders would probably go on but C series both pre and post war types will go straight on and are dimensionally pretty much the same.
Both C and M models share quite a few parts with the pre war B series.