Rebuild Kit for a Pair of HS6 Carburettors | CRK 151 Genuine SU Rebuild Kit — Part Number: CRK 151. A comprehensive rebuild kit containing: full set of Gaskets and Seals, main Jet, Needle Valve and seat for the Float Bowl, Throttle Spindle, Throttle Disc and Screws, and new Spindle Bushes.