232243 Replacement Parts Needle Valve Assy

The Mikuni HS40 needle valve assembly is a vital replacement part for maintaining the fuel level within the carburetor float bowl. This assembly controls the flow of gasoline into the chamber, preventing overflows or lean conditions that can affect engine performance. Constructed with precision-ground surfaces and durable seals, it ensures a consistent fuel supply for Harley-Davidson motorcycles equipped with the 40mm SmoothBore venturi. Whether you are restoring an older carburetor or performing routine maintenance, using genuine Mikuni parts guarantees compatibility and performance. This assembly is designed to withstand modern fuel additives while providing the reliable sealing required for smooth idling and acceleration.