Honda Non-OEM Seal P/N 91271-MB0-000 47X56X7 Rear Driveshaft Discontinued By Honda.  This is a new quality seal made by an ISO 9001 company in Japan.  This fits on the back of the driveshaft that seals in the gear lube for the cam and damper assembly.  Fits the models below and maybe more.

Part # = 91271-MB0-000
Part Description = OIL SEAL (47X56X7) 
Model Count = 18
CB650SC-D 1983 650 Nighthawk 650 Street 
CB650SC-E 1984 650 Nighthawk 650 Street 
CB650SC-F 1985 650 Nighthawk 650 Street 
CB700SC-E 1984 700 Nighthawk 700S Street 
CB700SC-F 1985 700 Nighthawk 700S Street 
CB700SC-G 1986 700 Nighthawk 700S Street 
VF1100C-D 1983 1100 V65 Magna Street 
VF1100C-E 1984 1100 V65 Magna Street 
VF1100C-F 1985 1100 V65 Magna Street 
VF1100C-G 1986 1100 V65 Magna Street 
VF1100S-E 1984 1100 V65 Sabre Street 
VF1100S-F 1985 1100 V65 Sabre Street 
VF700S-E 1984 700 VF700S Sabre Street 
VF700S-F 1985 700 VF700S Sabre Street 
VF750C-C 1982 750 VF750C V45 Magna Street 
VF750C-D 1983 750 VF750C V45 Magna Street 
VF750S-D 1982 750 VF750S V45 Sabre Street 
VF750S-E 1983 750 VF750S V45 Sabre Street