GS61344 - SPROCKET - BSA B&M Group (M20/M21/B31/A10) 4 Lobe, 17T. (OEM 15 1567)

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BSA B&M Group (M20/M21/B31/A10) 4 Lobe Engine Sprocket 17T Chain Pitch: 1/2'' x 3/16'' Number of Teeth: 17T