 This is a replacement O.S. Engines 21J Carburetor, intended for use with the the OS .28XZ Truggy Engine (#OSM12830), as well as the VZ-B V-Spec (#OSM13895), and Speed V-Spec (#OSM13911) Engines.
This three needle, slide valve carburetor features a black carburetor body finish, a blue nylon 9mm carburetor insert and a newly repositioned idle screw location. The idle screw adjustment has been repositioned to the top of the carburetor for easier idle adjustment, and the thermal sleeve at the base of the carburetor has been designed to reduce carburetor temperatures.
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