BSA A10 B31 M20 M21 FOUR 4 LOBE ENGINE SPROCKET 20 TOOTH 20T 15-1564

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BSA B&M Group (M20/M21/B31/A10) 4 Lobe Engine Sprocket 20T

Chain Pitch: 1/2'' x 3/16''
Number of Teeth: 20T

OEM: 15-1564