Phenolic Amal Carburetor Insulator 30mm Triumph Norton BSA thin Everything Else-1 Quality seems excellent

Quality seems excellent

These bushing should ALL Ducati ohc single

but two threaded outlets in your fuel tank

maybe some tiny imperfections in the aluminum face but nothing that can't be ignored

ID a bit large

Phenolic Amal Carburetor Insulator 30mm Triumph Norton BSA thin Everything Else-1 Quality seems excellentTriumph BSA part number 70 2968, also suitable for Norton. (Any earlier part numbers for a 30mm insulator supersede) Typically used between carb and manifold for 441 500 single, 650 and 750 twin. American made, GUARANTEED to fit, but Commando will require slight relieving at inner edges as the intake ports are so tight. Thickness 1 16". Thicker versions available in another listing.