Mikuni 38MM TM Flat Carburetor W/Cable Choke TM38-102 Mikuni offers specially prepared carburetors designed to meet the unique demands of snowmobiles. Features are special throttle valve and needle valve designs better suited to colder, more dense air and constant throttle settings. NOTE: Snowmobile Carburetors come with cable operated starter system. Carb Size - 38mm Main Jet - 340