Looking for engine parts for '78 F2

[Simon]

Hi

I am still working on my engine rebuild. I managed to get a new crankcase for the bike which is in excellent condition. Unfortunately during my rebuild I have realised that 1 of the A rings (part no. 13495300000) and both of the B rings (part no. 13496300000) are missing. I have tried CMSNL and David Silver and neither have them. They are very simple parts but seem to be out of production. Can any tell me where I might get them or someone who could make them up?

Thanks

[Bryanj]

Those will transfer from the engine you take apart, or from any 750 SOHC as they have a 300 middle number.

Not surprising they are not available as the only time you would need them is when they are lost as they never wear out