Having got the wheels rebuilt for my 1951 Black Shadow, I'm now preparing to fit the drums. However closer inspection of the drums shows some areas of corrosion an the braking faces (previously hidden by masking tape) as I think the bike stood outside for some time before I bought it in 1971.
Set up in my lathe jig, the run out on the undamaged faces of the drums are all less than 0.1mm but the rough areas of corrosion need to be removed. They are the standard ribbed cast iron drums and I'm all set up to skim them, but would like to know what is the maximum diameter I can safely take them out to.
Set up in my lathe jig, the run out on the undamaged faces of the drums are all less than 0.1mm but the rough areas of corrosion need to be removed. They are the standard ribbed cast iron drums and I'm all set up to skim them, but would like to know what is the maximum diameter I can safely take them out to.