Piston Ring Set STD Gandini BSA C15 B25 250 rings STD standard 67mm Italy Norton They are not knurled so

They are not knurled so they will fit any tree clamp that is no wider than 4 3/4"

BSA unit twins 650 A65 and 500 A50 / Norton Commando 1969 to 1974 750 and all 850

pedal length is 4 1/4" and spindle is approx 7/8"

This kit comes complete with everything needed to change your Norton from a dual carb to a single carb Mikuni

The static length is 6 3/4"

Piston Ring Set STD Gandini BSA C15 B25 250 rings STD standard 67mm Italy Norton They are not knurled soYou will receive a set of Gandini Piston Rings. Part number 674A. The 3 STD Piston Rings are brand new, never installed, and in excellent condition. They are 67mm in diameter. Will fit in BSA C15 Star 250. Condition: NEW Brand: GANDINI INDUSTRIA Country Region of Manufacture: ITALY Manufacturer Part Number: 674A