Could be suitable for BSA Triumph Brough Superior Norton Matchless Scott AJS AJW Sunbeam Rex Acme Panther HRD Vincent Dunelt Coventry Eagle Ariel New Hudson Montgomery Grindlay Peerless OK Supreme OEC Francis Barnet James NUT New Imperial Werner Douglas Excelsior DOT Calthorpe Cotton Chater Lea Zenith Stevens Velocette Rudge Sun Norman Bat Raleigh Bradbury Radco Levis Humber P&M Harley Davidson Villiers Indian JAP etc.