This is not only an alternative to the standard carburetor but a real improvement. The carburetor know an excellent build quality, the default setting fits exactly to the engine, is easy to install (even by hobby screwdrivers). The SR 51 runs perfectly, clean throttle response, good power delivery over the entire rev range, in conjunction with the with me built vape ignition of scooters now runs almost perfectly, Price - performance ratio was thus one hundred percent, real class
