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For which bike are these cylinders?
Posted: Mon Sep 07, 2020 11:17 am
by pkrpkr
Can anyone help identifying two sidevalve cylinders I have found? The piston diameter is approx. 70mm so I presume about 500-600cc on a twin.
Thanks,
Peter
Re: For which bike are these cylinders?
Posted: Fri Sep 11, 2020 9:38 am
by Darryl.Richman
Because of the 6 crankcase mounting bolt holes and the shape of the cutout over the valve area, these are for the side valves in the models from 1937-1942. That includes the R71, R61 and R6. But only the R6
https://vintagebmw.org/model-lookup/?shownode=6337 and R61
https://vintagebmw.org/model-lookup/?shownode=6999 have 700mm bore pistons.
Re: For which bike are these cylinders?
Posted: Sun Nov 22, 2020 7:00 am
by pkrpkr
Thanks Darryl!