Qiankun 49cc 66cc 70cc 80cc 2 Stroke Engine Motorized Bicycle Bike Carb Racin Carburetor (silver) Racing Carb Carburetor for 50cc 60cc 66cc 80cc 2 Stroke Gas Motorized Bike Manifold Outlet Diameter 19mm inside Air Filter Outlet Diameter 58mm Outside It also Fits Chinese made two strokes' 49cc 47cc pocket bike/mini bike/mini ATVs Etc, Lets your engine ride cleaner and gains horse power. Replacement for MTA-1 ( Cagllari), MTA-2 (MX-3), MTA-3 (GP-RSR), 4 Wheeler ATVS, MTA-4 (A-4 Quattro), S4- Cobra, Evolution, Blade, Raptor, Terminator, Giovanni and Zemmi, 2 stroke pocket bikes, ATV's or dirt bikes.