Fork Oil Seals, for use on BSA models: C15 Star, B40 Star and Velocette models: Mac, Viper, Venom. O.E.M: 40-5049 & 355/4. Supplied in: PairsBSA & Velocette Fork Oil Seals, 40-5049. 26293 / OS4SKU: 40-5049£6.99PriceQuantity*Add to Cart