The YCF SM F125 is a model of motorcycle manufactured by YCF, a French company specializing in the production of pit bikes and mini motocross bikes. However, as of my knowledge cutoff in September 2021, I couldn't find any specific information about the YCF SM F125 model. It's possible that this model was released after my knowledge cutoff date, or it may be a variant or limited edition that I'm not aware of. For the most accurate and up-to-date information about the YCF SM F125, I recommend visiting the official YCF website or contacting YCF directly.