- 1974 TY250A - Crank-Piston
- 1975 DT250B - Crank - Piston 250B - C - 400B - C
- 1975 DT400B - Crank - Piston 250B - C - 400B - C
- 1975 MX250B - Crank - Piston
- 1975 MX400B - Crank-Piston
- 1976 DT250C - Crank - Piston 250B - C - 400B - C
- 1976 DT400C - Crank - Piston 250B - C - 400B - C
- 1976 IT400C - Crank - Piston
- 1976 TY250C - Crank-Piston
- 1976 YZ250C - Crankshaft-Piston
- 1976 YZ400C - Crank Piston Yz400c D E
- 1977 DT250D - Crank - Piston
- 1977 DT400D - Crank - Piston
- 1977 IT250D - Crank - Piston
- 1977 IT400D - Crank - Piston
- 1977 TY250D - Crank-Piston
- 1977 YZ250D - Crankshaft-Piston
- 1977 YZ400D - Crank Piston Yz400c D E
- 1978 DT250E - Crankshaft Piston
- 1978 DT400E - Crankshaft Piston
- 1978 IT250E - Crank - Piston
- 1978 IT400E - Crank - Piston
- 1978 YZ250E - Crankshaft-Piston
- 1978 YZ400E - Crank Piston Yz400c D E
- 1979 DT250F - Crankshaft - Piston
- 1979 IT250F - Crank - Piston
- 1979 IT400F - Crank-Piston
- 1979 YZ250F - Crankshaft - Piston
- 1979 YZ400F - Crank-Piston
- 1980 IT250G - Crankshaft-Piston
- 1980 IT425G - Crankshaft - Piston
- 1980 YZ250G - Crankshaft Piston Yz250g H
- 1980 YZ465G - Crankshaft - Piston
- 1981 IT250H - Crankshaft - Piston
- 1981 IT465H - Crankshaft-Piston
- 1981 YZ250H - Crankshaft Piston Yz250g H
- 1981 YZ465H - Crankshaft - Piston
- 1982 IT250J - Crankshaft-Piston
- 1982 IT465J - Crankshaft - Piston
- 1982 YZ250J - Crankshaft - Piston
- 1982 YZ490J - Crankshaft-Piston
- 1983 IT250K - Crankshaft - Piston
- 1983 IT490K - Crankshaft-Piston
- 1983 YZ250K - Crankshaft Piston Yz250k
- 1983 YZ250K - Crank Piston Yz250l
- 1983 YZ490 (YZ490K) - Crankshaft Piston
- 1984 IT490L - Crankshaft-Piston
- 1984 YZ250L - Crankshaft Piston Yz250k
- 1984 YZ250L - Crank Piston Yz250l
- 1984 YZ490L - Crank - Piston
- 1985 YTZ250N - Crankshaft-Piston
- 1985 TRIALS (TY350N) - Crankshaft - Piston
- 1985 YZ250 (YZ250N) - Crankshaft-Pistion
- 1985 YZ490 (YZ490N) - Crankshaft-Piston
- 1986 YTZ250S - Crankshaft-Piston
- 1986 YZ490S - Crankshaft Piston
- 1986 TRIALS (TY350S) - Crankshaft - Piston
- 1986 YZ250 (YZ250S) - Crankshaft Piston
- 1987 YZ250T - Crankshaft - Piston
- 1987 YZ490T - Crankshaft-Piston
- 1988 YZ250U - Crankshaft Piston
- 1988 YZ490U - Crankshaft Piston
- 1989 YZ250W - Crankshaft-Piston
- 1989 YZ250WRW - Crankshaft - Piston
- 1989 YZ490W - Crankshaft Piston
- 1990 YZ250A - Crankshaft Piston
- 1990 YZ250WRA - Crankshaft - Piston
- 1990 YZ490A - Crankshaft Piston
- 1991 WR250ZB - Crankshaft - Piston
- 1991 YZ250 (YZ250B1) - Crankshaft Piston
- 1992 WR250ZD - Crankshaft - Piston
- 1992 WR500ZD - Crankshaft Piston
- 1992 YZ250D1 - Crankshaft-Piston
- 1993 WR250ZE - Crankshaft - Piston
- 1993 WR500ZE - Crankshaft - Piston
- 1993 YZ250E - Crankshaft - Piston
- 1993 YZ250E1 - Crankshaft - Piston
- 1994 WR250ZF - Crankshaft - Piston
- 1994 YZ250F1 - Crankshaft - Piston
- 1995 WR250ZG - Crankshaft - Piston
- 1995 YZ250G1 - Crankshaft Piston
- 1996 WR250ZH - Crankshaft - Piston
- 1996 YZ250H1 - Crankshaft Piston
- 1997 WR250ZJ - Crankshaft - Piston
- 1997 COMPETITION (YZ250J1) - Crankshaft - Piston
YAMAHA DT IT MX TY WR YTZ YZ Crankshaft Oil Seal 93103-40091
YAMAHA SW Type Crankshaft Oil Seal OEM Ref. # 93103-40091 NOS New Old Stock. MB31A/B
Fits
DT250B 1975 250 DT250 Dual Purpose
DT250C 1976 250 DT250 Dual Purpose
DT250D 1977 250 DT250 Dual Purpose
DT250E 1978 250 DT250 Dual Purpose
DT250F 1979 250 DT250 Dual Purpose
DT400B 1975 400 DT400 Dual Purpose
DT400C 1976 400 DT400 Dual Purpose
DT400D 1977 400 DT400 Dual Purpose
DT400E 1978 400 DT400 Dual Purpose
IT250D 1977 250 IT250 Dual-Purpose
IT250E 1978 250 IT250 Dual-Purpose
IT250F 1979 250 IT250 Dual-Purpose
IT250G 1980 250 IT250 Dual-Purpose
IT250H 1981 250 IT250 Dual-Purpose
IT250J 1982 250 IT250 Dual-Purpose
IT250K 1982 250 IT250 Dual-Purpose
IT400C 1976 400 IT400 Dual-Purpose
IT400D 1977 400 IT400 Dual-Purpose
IT400E 1978 400 IT400 Dual-Purpose
IT400F 1979 400 IT400 Dual-Purpose
IT425G 1980 425 IT425 Dual-Purpose
IT465H 1981 465 IT465 Dual-Purpose
IT465J 1982 465 IT465 Dual-Purpose
IT490K 1983 490 IT490 Dual-Purpose
IT490L 1984 490 IT490 Dual-Purpose
MX250B 1975 250 MX250 Off-Road
MX400B 1975 400 MX400 Off-Road
TY250A 1974 250 TY250 Trials
TY250C 1976 250 TY250 Trials
TY250D 1977 250 TY250 Trials
TY250E 1978 250 TY250 Trials
TY250RD 1992 250 TY250R Trials
TY350N 1985 350 TY350 TRIALS Trials
TY350S 1986 350 TY350 TRIALS Trials
WR250ZB 1991 250 WR250Z Off-Road
WR250ZD 1992 250 WR250Z Off-Road
WR250ZE 1993 250 WR250Z Off-Road
WR250ZF 1994 250 WR250Z Off-Road
WR250ZG 1995 250 WR250Z Off-Road
WR250ZH 1996 250 WR250Z Off-Road
WR250ZJ 1997 250 WR250Z Off-Road
WR250ZJ1 1997 250 WR250Z-J1 Off-Road
WR500ZD 1992 500 WR500Z Off-Road
WR500ZE 1993 500 WR500Z Off-Road
YTZ250N 1985 250 YTZ250 TRI-Z ATV
YTZ250S 1986 250 YTZ250 TRI-Z ATV
YZ250A1 1990 250 YZ250 Competition Motocross
YZ250B1 1991 250 YZ250 Competition Motocross
YZ250C 1976 250 YZ250 Competition Motocross
YZ250D 1977 250 YZ250 Competition Motocross
YZ250D1 1992 250 YZ250 Competition Motocross
YZ250E 1978 250 YZ250 Competition Motocross
YZ250E1 1993 250 YZ250 Competition Motocross
YZ250F1 1994 250 YZ250 Competition Motocross
YZ250G 1980 250 YZ250 Competition Motocross
YZ250G1 1995 250 YZ250 Competition Motocross
YZ250H 1981 250 YZ250 Competition Motocross
YZ250H1 1996 250 YZ250 Competition Motocross
YZ250J 1982 250 YZ250 Competition Motocross
YZ250J1 1997 250 YZ250 Competition Motocross
YZ250K 1983 250 YZ250 Competition Motocross
YZ250L 1984 250 YZ250 Competition Motocross
YZ250N 1985 250 YZ250 Competition Motocross
YZ250S 1986 250 YZ250 Competition Motocross
YZ250T 1987 250 YZ250 Competition Motocross
YZ250U 1988 250 YZ250 Competition Motocross
YZ250W 1989 250 YZ250 Competition Motocross
YZ250WRA 1990 250 YZ250WR Competition Motocross
YZ250WRW 1989 250 YZ250WR Competition Motocross
YZ400C 1976 400 YZ400 Competition Motocross
YZ400D 1977 400 YZ400 Competition Motocross
YZ400E 1978 400 YZ400 Competition Motocross
YZ400F 1979 400 YZ400 Competition Motocross
YZ465G 1980 465 YZ465 Competition Motocross
YZ465H 1981 465 YZ465 Competition Motocross
YZ490A 1990 490 YZ490 Motocross Motocross
YZ490J 1982 490 YZ490 Motocross Motocross
YZ490K 1983 490 YZ490 Motocross Motocross
YZ490L 1984 490 YZ490 Motocross Motocross
YZ490N 1985 490 YZ490 Motocross Motocross
YZ490S 1986 490 YZ490 Motocross Motocross
YZ490T 1987 490 YZ490 Motocross Motocross
YZ490U 1988 490 YZ490 Motocross Motocross
YZ490W 1989 490 YZ490 Motocross Motocross