Conventional FCR carburetors achieving high power and high response have also won acclaim in off-road racing, where the rise of four-stroke machines has been remarkable. However, because the FCR carburetor was developed on the assumption that it would be used in road races, readiness for severe conditions of use such as the jumps and mud found off-road was called for. The "FCR-MX" carburetor was therefore developed especially for motocross. It provides outstanding performance even in top-flight motocross and enduro races.