A recurrent problem have been disturbing my now regular rides. May be that somebody experienced a similar problem and can give me an advise.
The problem is that the distributor of my 1928 M2 suddenly gets loose and retards the ignition. I found that in there, are two clamps that fix the distributor body, the lower looks as if has been designed to fix the distributor and should be used when removing it only. The upper looks like if it has been designed to advance or retard the ignition. What is happening is that the distributor gets loose in the lower clamp, even adjusted several times, but with the alert of not too much, as may break the body. Finally and temporarily, solved the problem tying the distributor with a wire to avoid rotation and it works.
Does somebody know a practical and safe way to avoid mentioned rotation? I do not want to invent a solution modifying original design.