CFM: 500 CFM. CFM Range: 500-599 CFM. Manual Choke. For Harley Davidson CV 40MM Harley CV Carb Performance Tuned Carburetor USA. 1 Carburetor. Carburetor Flange Type: 4-Barrel Square Bore. Fluid Extractor Pump Manual Suction Oil Fuel Disel Transmission Transfer.