The Dellorto SHA has two choke types to order. One has the normal adjustment on the carbureter (which is what I should have ordered. Mine is a type made for a cable end like the China engine carbureters throttles. I need to use an extra throttle cable but I need to attach the cable to a ratcheting or high resistence lever because there is a strong spring in the carbureter that keeps the occlusion choke open unless the choke lever through a cable is pulled and held. There is no access on the surface of my type of carbureter to adjust the carbureter.