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Rear sprockets for Ironhead Sportsters 1979-85.
Stock 51 Tooth Sprocket is Harley OE. Part Num: 41470-73 in Zinc & 41470-78 in Chrome for 1979-81 Sportster
Stock 48 Tooth Sprocket is Harley OE Part Num: 41470-82 for 1982-85 Sportster
