On my 1967 Atlas, the camshaft is knackered. The bearing surfaces are scored and ridged, and the lobs are a tad too shiny at the tips. My (late) father suspected foul play. The alternative is that he did something stupid and inadvertently nuked it.
Que sera-sera. Anyway... while rummaging...
Norton Commando Cam Bushing Information
Download the complete PDF version using the green download button at the top right of this page for detailed Norton Commando camshaft bushing comparison and installation information.
This useful Old Britts technical article compares the six different...
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