This REGULATOR is fit on DAELIM SL125S,SL125U,SQ125,SV125,SV250,VJ125,VJF125,VJF250,VL125 and its part number is 31600-SAB-0000-M1. Plus, it will fit on SN125 EFI model as well. The part number 31600-BA1-R300 is no longer produced and then this one is the new type of regulator instead of the previous one. It is almost same as the previous one but only its bolt size and bolt fixing area is a little different. But it is still very easy to install. NOTE : Please remember that electric goods(such as regulators, magnet coils & CDIs and so on) are not able to be refunded/exchanged if it was used.