The S3 sintered compound is optimal for street bikes, dual sport, touring, cruisers. It's recommended on applications with rather larger engines or for people who ride harder than average and want the great stopping power of a sintered brake pad. Fits: Honda CB450S 1986-1990 CBR250R MC17 1987 CBR400R Aero 1986-1987 CBR600F 1987-1994 NSR250 MC16 1986-1987 VFR400 NC21 1986 VFR400 NC24 1987-1989 XRV650 AFRICA TWIN 1988-1990 XRV750 Africa Twin 1990-1993