HD8 Sandcast Piston & Suction Chamber Assembly | ABF653

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Genuine SU Sandcast HD8 piston and suction chamber assembly. The suction chamber and piston are the core of the SU carburettor's variable-choke mechanism. The piston rises and fall s in response to engine demand, metering fuel via the attached needle. Replace if the piston is scratched, scored, or if there is excessive side play in the assembly. Part Number: ABF653 Show more