Complete genuine SU master overhaul kit for dual HS4 carburetors with plain discs and plain jets. This kit is for carburetors with earlier non-waxstat jets and plain throttle discs without an overrun valve. This kit includes everything you will typically need to overhaul a pair of carburetors. Includes jet assemblies, needles and seats, throttleshafts, discs, fasteners, throttleshaft bushes, and all gaskets and seals.
 
Does not include floats, needles, or jet bearing assemblies.