Racing Carburetor 2 Stroke 49cc 66cc 70cc 80cc With Air Filter For 2 Stroke Engine Motorized Bicycle BLUE/RED

Concerning this item Outlet Diameter ：59MM Inner Diameter ：19MM Model ：2 Stroke Engine Motorized Bicycle Product Description Fits   49cc 66cc 70cc 80cc with 2 stroke Characteristic Racing Carburetor for Motorized Bicycle 49cc 66cc 70cc 80cc No modifications can be made to optimize the fuel and air combination. A standard carburetor ensures that both engines, one operating at sea level and the other in Denver (1 mile high), receive the same air-fuel ratio, despite the changes in altitude. Moreover, as each engine operates slightly differently, I suggest experimenting with several or even all of the available jets to find the optimal setting. You'll notice a significant improvement in engine performance once it receives the right quantity of air and fuel in the combustion chamber. Extremely Restrictive Afilter Covers The incoming air is mixed with the fuel through the carburetor and supplied to the engine after mixing. Therefore fuel is necessary, without which it cannot work