YAMAHA MODEL INDENTIFICATION NUMBERS CHART

1971 MINI ENDURO

JT1

SERIAL # JT1-000101 - 041708

JT1

SERIAL # JT1L-200101 - 201152 W/LIGHTS

1972 MINI ENDURO

JT2 COMPETITION

SERIAL # JT1-050101 - 071150

JT2

SERIAL # JT1-300101 - 330000 W/LIGHTS

1974 YZ A

YZ 80 A

SERIAL # 462-000101 - 009661

YZ 125 A

SERIAL # 453-000101 - 007730

YZ 250 A

SERIAL # 431-000101 - 004104

YZ 360 A

SERIAL # 432-000101 - 000631

1975 YZ B

YZ 80 B

SERIAL # 492-000101 - 018570

YZ 125 B

SERIAL # 453-100101 - 101620

YZ 250 B

SERIAL # 483-000101 - 002759

YZ 360 B

SERIAL # 484-000101 - 001459

1976 YZ C

YZ 100 C

SERIAL # 1J4-000101 - 003470

YZ 125 C

SERIAL # 537-000101 - 014044

YZ 125 X

SERIAL # 1G8-000101 - 007120

YZ 175 C

SERIAL # 1L8-000101 - 001610

YZ 250 C

SERIAL # 509-100101 - 103405

YZ 400 C

SERIAL # 510-100101 - 102838

1977 YZ D

YZ 100 D

SERIAL # 1J4-000101 - 103550

YZ 125 D

SERIAL # 1W1-000101 - 015610

YZ 250 D

SERIAL # 1W3-000101 - 006520

YZ 400 D

SERIAL # 1W4-000101 - 006720

1978 YZ E

YZ 100 E

SERIAL # 2K5-000101 - 006572

YZ 125 E

SERIAL # 2K6-000101 - 015080

YZ 250 E

SERIAL # 2K7-000101 - 009850

YZ 400 E

SERIAL # 2K8-000101 - 007406

1979 YZ F

YZ 100 F

SERIAL # 2W5-000101 - N/A

YZ 125 F

SERIAL # 2X3-000101 - N/A

YZ 250 F

SERIAL # 2X4-000101 - N/A

YZ 400 F

SERIAL # 2X5-000101 - N/A

1980 YZ G

YZ 100 G

SERIAL # 3R2-000101 - ON

YZ 125 G

SERIAL # 3R3-000101 - ON

YZ 250 G

SERIAL # 3R4-000101 - ON

YZ 465 G

SERIAL # 3R5-000101 - ON

LT SERIES

LTMX

Year: 1973

Start Engine#: LT2-105101

MX SERIES

MX100B

Year: 1975

Start Engine#: 427-100101

MX100F

Year: 1979

Start Engine#: 3M1-000101

MX100G

Year: 1980

Start Engine#: 3T0-000101

MX125

Year: 1973

Start Engine#: AT1-325101

MX125A

Year: 1974

Start Engine#: 402-000101

MX125B

Year: 1975

Start Engine#: 402-100101

MX125C

Year: 1976

Start Engine#: 565-000101

MX175A

Year: 1974

Start Engine#: 455-000101

MX175B

Year: 1975

Start Engine#: 455-100101

MX175F

Year: 1979

Start Engine#: 3M2-000101

MX175G

Year: 1980

Start Engine#: 3M2-100101

MX250

Year: 1973

Start Engine#: 364-000101

MX250A

Year: 1974

Start Engine#: 364-020101

MX250B

Year: 1975

Start Engine#: 509-000101

MX360

Year: 1973

Start Engine#: 365-000101

MX360A

Year: 1974

Start Engine#: 365-020101

MX400B

Year: 1975

Start Engine#: 510-000101

AT SERIES

AT1

Year: 1969

Start Engine#: AT1-100101

AT1B

Year: 1970

Start Engine#: AT1-120101

AT1BMX

Year: 1970

Start Engine#: AT1-310101

AT1C

Year: 1971

Start Engine#: AT1-139101

AT1M

Year: 1969

Start Engine#: AT1-300101

AT1MX

Year: 1971

Start Engine#: AT1-313101

AT2

Year: 1972

Start Engine#: AT1-165101

AT2M

Year: 1972

Start Engine#: AT1-317101

AT3

Year: 1973

Start Engine#: AT1-200101

CT SERIES

CT1

Year: 1971

Start Engine#: CT1-000101

CT1B

Year: 1970

Start Engine#: CT1-010101

CT1C

Year: 1971

Start Engine#: CT1-200101/CT1-032101

CT2

Year: 1972

Start Engine#: CT1-065101

CT3

Year: 1973

Start Engine#: CT1-100101

DT SERIES

DT100A

Year: 1974

Start Engine#: 437-000101

DT100B

Year: 1975

Start Engine#: 437-100101

DT100B5

Year: 1975

Start Engine#: 540-000101

DT100C

Year: 1976

Start Engine#: 558-000101

DT100D

Year: 1977

Start Engine#: 1T9-000101

DT100E

Year: 1978

Start Engine#: 2F5-000101

DT100F

Year: 1979

Start Engine#: 2F5-050101

DT100G

Year: 1980

Start Engine#: 3A3-000101

DT125A

Year: 1974

Start Engine#: 444-000101

DT125B

Year: 1975

Start Engine#: 444-100101

DT125C

Year: 1976

Start Engine#: 560-000101

DT125E

Year: 1978

Start Engine#: 2A6-000101

DT125F

Year: 1979

Start Engine#: 2N4-000101

DT125G

Year: 1980

Start Engine#: 3J0-000101

DT175A

Year: 1974

Start Engine#: 443-000101

DT175B

Year: 1975

Start Engine#: 443-100101

DT175C

Year: 1976

Start Engine#: 559-000101

DT175D

Year: 1977

Start Engine#:

DT175E

Year: 1978

Start Engine#: 2A7-000101

DT175F

Year: 1979

Start Engine#: 2N5-000101

DT175G

Year: 1980

Start Engine#: 3J1-000101

DT1

Year: 1968

Start Engine#: DT1-00101

DT1B

Year: 1969

Start Engine#: DT1-15001

DT1C

Year: 1970

Start Engine#: DT1-50101

DT1CM

Year: 1970

Start Engine#: DT1-95101

DT1E

Year: 1971

Start Engine#: DT1F-00101/DTF-020101

DT1MX

Year: 1971

Start Engine#: DT1F-090101

DT2 SERIES

DT2

Year: 1972

Start Engine#: DT1F-105101

DT250A

Year: 1974

Start Engine#: 450-000101

DT250B

Year: 1975

Start Engine#: 450-200101

DT250C

Year: 1976

Start Engine#: 450-500101

DT250D

Year: 1977

Start Engine#: 1M1-000101

DT250E

Year: 1978

Start Engine#: 1M1-100101

DT250F

Year: 1979

Start Engine#: 2N6-000101

DT2M

Year: 1972

Start Engine#: DT1F-185101

DT3 SERIES

DT3

Year: 1973

Start Engine#: DT1F-135101

DT360A

Year: 1974

Start Engine#: 446-000101

DT400C

Year: 1976

Start Engine#: 501-200101

DT4 SERIES

DT400D

Year: 1977

Start Engine#: 1M2-000101

DT400E

Year: 1978

Start Engine#: 1M2-100101