Gearbox Sprocket Rigid/Plunger 19T. BSA B31/B33 Chain 5/8 x 1/4 110-054.. (520) for use with oil sealPlease see measurements last picture or technical dataM20 500 S.V. 1949-1956 M21 600 S.V 1949-1958 M33 500 O.H.V 1949-1957Made in England
VM. Thruxton. MSS Engine Sprocket 23T. Velocette
Made by Velocette Ltd.
MSS
Venom
Clubman 500cc (MKI and MKII)
Scrambler 500cc
Thruxton
Endurance
Made in England