BSA Engine Sprocket/Chain Sprocket B31,B32,B33,B34,Gold Star.M20.M21.M33/ 18T. 4-Lobe
s49) 15-1566.18T
4 Lobe BSA B31,B32,B33,B34,
Gold Star.
18T.
M20.M21.M33
110-046
428 chain
1/2x5/16"
New
Made in England
Gold Star.
18T.
M20.M21.M33
110-046
428 chain
1/2x5/16"
New
Made in England