Wassell Front Brake Master Cylinder w/ Lucas Switch Plate Triumph Norton 750 850 BSA Wheel these nuts (0170-59-080) were used

these nuts (0170-59-080) were used to attach the rear shocks and used on just about ALL Ducati singles

Guzzi part number 1976-8720

They should fit just about any vintage Triumph or BSA engine

Direct replacement for Amal 930 Concentric Premier

looks great

Wassell Front Brake Master Cylinder w/ Lucas Switch Plate Triumph Norton 750 850 BSA Wheel these nuts (0170-59-080) were usedThis version includes an adaptor plate to mount OEM Lucas or Sparx r h switch, see 2nd photo. Suitable for most '70s British with single disc brake. (Sets with well matching clutch lever available in another listing.) Asian made, supplied by Wassell of England. Quality seems dandy. (Note that this cylinder uses a banjo bolt connection, new brake line will need to be fabricated, not a big deal from nearly any hydraulics shop.)