BSA A7 A10 B31 B33 B34 M20 M21 Swinging Arm 6 SPRING CLUTCH CUPS 66-3781

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Suits all BSA Post War Singles & Twins That Use a Six Spring Clutch

BSA A7 A10 1954-59 (Swinging Arm)
BSA M20 and M21 1949-58
BSA B31 B32 B33 B34 1949-60 (Including Goldstars)