Carburetor & Accessories
In general, motorcycle carburetor is a device that measure and mixes the right amount of air and fuel before it enters the cylinder for burning. It is important to ensure that the engine works efficiently. All carburetors work under the basic principle of atmospheric pressure. The faster air moves, the lower its static pressure, and the higher its dynamic pressure. This system draws air into the carburetor, then draw in gasoline and atomize it while it's mixed with the air. This mixture will then be drawn into the combustion chamber for burning.
Theoretically, for a properly tuned engine running on pure gasoline, the ideal ratio of air and fuel (A/F) mixture is 14.7:1; meaning that for each unit of gasoline, 14.7 units of air will be consumed. However, due to operating losses in the induction system, plus the fact that fuel may not completely vaporized in the combustion chamber, a 14.7:1 A/F mixture ratio is often too lean for actual operating needs. Thus, a more realistic light-load of A/F mixture for a stock carburetor to work properly on reformulated unleaded gasoline is in the 14.1:1 range.