Locations- under BB, dropouts, headtube, seatpost clamp. Rat Rod Bikes forum and the BMX Museum but don't forget pictures of your bike and the serial number.Shop Huffy Bikes at JCPenney. Law enforcement partners can register to access more detailed documentation and reports based on information in the CPIC database. I am getting a Huffy BMX and was wondering how to decode the serial number I want to find out the year and other information about it. So 2626-145 was probably built in 1962 since it has a tank. You can only upload files of type PNG, JPG, or JPEG.