Triumph 350 / 500 / 650 / 750 c

they are 1 inch diameter with a 3/8 inch shaft for the spring to sit over

Versatile 3-Position Control: Features a central 'off' position

BSA A65): Use a P26-130 main jet (comparable to an Amal 190)

Whitworth 6 pc 12-pt Socket set Koken 3/8 inch drive Subcategory_Tank Fabrication Parts Triumph 350 / 500 /A high quality set of Whitworth 12 point sockets by Koken (Japan). 3 8" drive. Includes a socket holder. A set of Whitworth tools for your old british motorcycle (Triumph, BSA, Norton, etc) or car is necessary, due to BSW or British Standard Whitworth hardware. Your standard or metric tools will never fit right and will round out your bolt heads. This set of 6 12 point sockets includes 1 8 WW, 3 16" WW, 1 4" WW, 5 16" WW, 3 8" WW, and 7 16" WW sockets.