2-Stroke Speed Carburetor The 2-Stroke Speed Carburetor adds a boost of power to all 2-stroke engine kits: 48cc, 66/80cc, and more With larger jets than the NT carburetor, more fuel and air are able to enter the carburetor, giving you more speed No need for a fuel valve, this carburetor has one built right on the side of the body Installation is as easy as installing the NT: just loosen and uninstall your existing carburetor, slip this carburetor on, clam down around the manifold, install the fuel line, and you're ready to ride