29-12-2023, 04:17 PM
Some of the earlier rubber mounted crankcases have a smaller diameter for the mounting bolt/rubber to pass through - you'll have to improvise. The new rubbers you show in the photo are for the later crankcase. I don't know when the size changed, but mine at #M238100 has the larger holes. (1935 I think). I have a 1933 crankcase with the same size holes as yours.
The early holes are 0.525" diameter. If you can source a length of rubber/poly tube 13mm dia with 1.5mm wall thickness it should do the trick.
This is what you need:
The early holes are 0.525" diameter. If you can source a length of rubber/poly tube 13mm dia with 1.5mm wall thickness it should do the trick.
This is what you need:
![[Image: 20231229-161417.jpg]](https://i.postimg.cc/RZJpvL14/20231229-161417.jpg)