Norton primary chaincase sealing rubber AMC gearbox with alternator. Made in UK. To use on pre alternator models cut the band at an angle eg 45 degrees, shorten it and glue the ends together. Not suitable for upright gearbox. Thickness: .375" (9.5MM); Width: .950" (24MM) of which: .060" (1.5MM) is a thin lip; Length: 45" (1143MM) Original Part Number: A2/486; (Norton changed the part with the laydown gearbox but did not change the part number - probably should be D12/486) 13185;- Front chaincase rubber sealing washer
