Primary Chaincase Gasket, for use on BSA models: A50 & A65.O.E.M: 71-1432 / 70-7854 / 68-0875Primary Chaincase Gasket: 68-0875 / 70-7854 / 71-1432. BSA A50 / A65. GAS 11SKU: 71-1432 / 70-7854 / 68-0875£4.45PriceQuantityAdd to Cart