Yamaha Vintage Dirt Bike I.D. Guide - - Dirtbike at Off-Road.com
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Yamaha Vintage Dirt Bike I.D. Guide
Publish date: Mar 1, 2004
By:  Rick Sieman
Source: Dirtbike at Off-Road.com
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Just In Case You're Wondering What That Old Bike Really Is

Wow, a real YZ race bike. But what is it? Read on.
I've been getting a lot of email over the last few years in the DON'T ASK column about folks trying to figure exactly what that old pile they have really is. While it's nice to know, it's also very important to know what it is when you have to scrounge up parts.

It also seemed that most of the emails were concerning the old Yamahas. And why not? Yamaha was the first company to come out with a full line of real dirt bikes for the masses.

Not exotic European stuff that required insiders knowledge to keep running, but low-cost, well built, reliable bikes that would keep running in spite of heavy-handed abuse and complete neglect in the maintenance department.


Numbers on the steering head gone? Don't worry. There are also numbers on the motor that can help you.

Lots of people learned to ride on the legendary Mini-Enduros, and thousands more cut their teeth on one or another version of the DT-1.

This guide covers most of the stuff from the late 60s up to 1980. There are a few models missing I guess, but after too many hours of scouring the manuals and the web, I figured there's enough here to help most of the folks out there who remain confused.

So have fun and let your fingers do the walking.

 

 

YAMAHA MODEL INDENTIFICATION NUMBERS CHART
1971 MINI ENDURO
JT1SERIAL # JT1-000101 - 041708
JT1SERIAL # JT1L-200101 - 201152 W/LIGHTS
1972 MINI ENDURO
JT2 COMPETITIONSERIAL # JT1-050101 - 071150
JT2SERIAL # JT1-300101 - 330000 W/LIGHTS
1974 YZ A
YZ 80 ASERIAL # 462-000101 - 009661
YZ 125 ASERIAL # 453-000101 - 007730
YZ 250 ASERIAL # 431-000101 - 004104
YZ 360 ASERIAL # 432-000101 - 000631
1975 YZ B
YZ 80 BSERIAL # 492-000101 - 018570
YZ 125 BSERIAL # 453-100101 - 101620
YZ 250 BSERIAL # 483-000101 - 002759
YZ 360 BSERIAL # 484-000101 - 001459
1976 YZ C
YZ 100 CSERIAL # 1J4-000101 - 003470
YZ 125 CSERIAL # 537-000101 - 014044
YZ 125 XSERIAL # 1G8-000101 - 007120
YZ 175 CSERIAL # 1L8-000101 - 001610
YZ 250 CSERIAL # 509-100101 - 103405
YZ 400 CSERIAL # 510-100101 - 102838
1977 YZ D
YZ 100 DSERIAL # 1J4-000101 - 103550
YZ 125 DSERIAL # 1W1-000101 - 015610
YZ 250 DSERIAL # 1W3-000101 - 006520
YZ 400 DSERIAL # 1W4-000101 - 006720
1978 YZ E
YZ 100 ESERIAL # 2K5-000101 - 006572
YZ 125 ESERIAL # 2K6-000101 - 015080
YZ 250 ESERIAL # 2K7-000101 - 009850
YZ 400 ESERIAL # 2K8-000101 - 007406
1979 YZ F
YZ 100 FSERIAL # 2W5-000101 - N/A
YZ 125 FSERIAL # 2X3-000101 - N/A
YZ 250 FSERIAL # 2X4-000101 - N/A
YZ 400 FSERIAL # 2X5-000101 - N/A
1980 YZ G
YZ 100 GSERIAL # 3R2-000101 - ON
YZ 125 GSERIAL # 3R3-000101 - ON
YZ 250 GSERIAL # 3R4-000101 - ON
YZ 465 GSERIAL # 3R5-000101 - ON
LT SERIES
LTMXYear: 1973Start Engine#: LT2-105101
MX SERIES
MX100BYear: 1975Start Engine#: 427-100101
MX100FYear: 1979Start Engine#: 3M1-000101
MX100GYear: 1980Start Engine#: 3T0-000101
MX125Year: 1973Start Engine#: AT1-325101
MX125AYear: 1974Start Engine#: 402-000101
MX125BYear: 1975Start Engine#: 402-100101
MX125CYear: 1976Start Engine#: 565-000101
MX175AYear: 1974Start Engine#: 455-000101
MX175BYear: 1975Start Engine#: 455-100101
MX175FYear: 1979Start Engine#: 3M2-000101
MX175GYear: 1980Start Engine#: 3M2-100101
MX250Year: 1973Start Engine#: 364-000101
MX250AYear: 1974Start Engine#: 364-020101
MX250BYear: 1975Start Engine#: 509-000101
MX360Year: 1973Start Engine#: 365-000101
MX360AYear: 1974Start Engine#: 365-020101
MX400BYear: 1975Start Engine#: 510-000101
AT SERIES
AT1Year: 1969Start Engine#: AT1-100101
AT1BYear: 1970Start Engine#: AT1-120101
AT1BMXYear: 1970Start Engine#: AT1-310101
AT1CYear: 1971Start Engine#: AT1-139101
AT1MYear: 1969Start Engine#: AT1-300101
AT1MXYear: 1971Start Engine#: AT1-313101
AT2Year: 1972Start Engine#: AT1-165101
AT2MYear: 1972Start Engine#: AT1-317101
AT3Year: 1973Start Engine#: AT1-200101
CT SERIES
CT1Year: 1971Start Engine#: CT1-000101
CT1BYear: 1970Start Engine#: CT1-010101
CT1CYear: 1971Start Engine#: CT1-200101/CT1-032101
CT2Year: 1972Start Engine#: CT1-065101
CT3Year: 1973Start Engine#: CT1-100101
DT SERIES
DT100AYear: 1974Start Engine#: 437-000101
DT100BYear: 1975Start Engine#: 437-100101
DT100B5Year: 1975Start Engine#: 540-000101
DT100CYear: 1976Start Engine#: 558-000101
DT100DYear: 1977Start Engine#: 1T9-000101
DT100EYear: 1978Start Engine#: 2F5-000101
DT100FYear: 1979Start Engine#: 2F5-050101
DT100GYear: 1980Start Engine#: 3A3-000101
DT125AYear: 1974Start Engine#: 444-000101
DT125BYear: 1975Start Engine#: 444-100101
DT125CYear: 1976Start Engine#: 560-000101
DT125EYear: 1978Start Engine#: 2A6-000101
DT125FYear: 1979Start Engine#: 2N4-000101
DT125GYear: 1980Start Engine#: 3J0-000101
DT175AYear: 1974Start Engine#: 443-000101
DT175BYear: 1975Start Engine#: 443-100101
DT175CYear: 1976Start Engine#: 559-000101
DT175DYear: 1977Start Engine#:
DT175EYear: 1978Start Engine#: 2A7-000101
DT175FYear: 1979Start Engine#: 2N5-000101
DT175GYear: 1980Start Engine#: 3J1-000101
DT1Year: 1968Start Engine#: DT1-00101
DT1BYear: 1969Start Engine#: DT1-15001
DT1CYear: 1970Start Engine#: DT1-50101
DT1CMYear: 1970Start Engine#: DT1-95101
DT1EYear: 1971Start Engine#: DT1F-00101/DTF-020101
DT1MXYear: 1971Start Engine#: DT1F-090101
DT2 SERIES
DT2Year: 1972Start Engine#: DT1F-105101
DT250AYear: 1974Start Engine#: 450-000101
DT250B Year: 1975Start Engine#: 450-200101
DT250CYear: 1976Start Engine#: 450-500101
DT250DYear: 1977Start Engine#: 1M1-000101
DT250EYear: 1978Start Engine#: 1M1-100101
DT250FYear: 1979Start Engine#: 2N6-000101
DT2MYear: 1972Start Engine#: DT1F-185101
DT3 SERIES
DT3Year: 1973Start Engine#: DT1F-135101
DT360AYear: 1974Start Engine#: 446-000101
DT400CYear: 1976Start Engine#: 501-200101
DT4 SERIES
DT400DYear: 1977Start Engine#: 1M2-000101
DT400EYear: 1978Start Engine#: 1M2-100101

 

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Comments and Questions from our Readers
RANDY / oak hill, OH, UNITED STATES
 Posted Jul 23 2007 05:41PM
TRYING TO FIND THE YEAR OF BIKE VIN NUM. GONE THE SERIAL NUM.IS 1W4-003437 CLOSE TO 78 BUT I THINK IT'S OLDER JUG 397cc by oil plug 1100cc
jeff / HIGHLAND, CA, UNITED STATES
 Posted Jul 25 2007 09:48PM
I HAVE A 1978 MX175G HELP ME WITH INFO PLEASE
seth / bellfountaine, OH, UNITED STATES
 Posted Aug 09 2007 06:31AM
i have a 80cc yhama dirt bike and have no clue wat model it is all i can find is the vin on the steering right below the handle bars could u help me out on identifing it the number is393-200102
jspecjoe / burton, MI, UNITED STATES
 Posted Jan 14 2008 07:56PM
363-001041 and 363-001420 why do they start iwth 363 i dont see that on the chart?
jspecjoe / burton, MI, UNITED STATES
 Posted Jan 14 2008 07:57PM
363-001041 and 363-001420 why do they start iwth 363 i dont see that on the chart?
Hutch / Kewaskum, WI, UNITED STATES
 Posted Jan 31 2008 12:59PM
Rick, I have a 1977 or 78 IT175. From a Yamaha VIN chart it appears they make no distinction between these two years. Is this correct?Also, how does the engine performance on the IT line compare to a YZ of the same era? Thanks,
Travis / MC BAIN, MI, UNITED STATES
 Posted Apr 28 2008 12:38AM
Im having trouble finding out what year my bike is the numbers on it are 427-101616 does any one know what year it might be?
Matt73 / St. Johns, MI, UNITED STATES
 Posted May 15 2008 08:55AM
I am a high school and we have recently acuired a 1965 motorcycle but no back ground as to what size it is. On the neck it has y23-25538 stamped on it. Then on the motor is has d9-25538 on it. Can you help me with any information??
turtletim1 / syracuse, IN, UNITED STATES
 Posted Jun 04 2008 10:31PM
MY wife bought me a bike at a garage sale for fathers day. they said it was a 77 yamaha 650. 1w2-006553 was on the neck and motor. 650cc by the oil fill. and 1w200 1710cc on the left side of jug. can u help me find out what it is.
 Posted Jun 14 2008 08:35PM
I am restoring what I assume is a 60cc Yamaha mini-enduro. However the serial number (matching) is JT1-202733, which is outside the range of serial numbers on the webpage. Can I just assume you didn't have the full range of serial numbers? also this bike has lights, but no speedo. and it doesn't have the L in the serial #.
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About the Author

Rick Sieman

"Super Hunky"

Yeh, it's me. Rick Sieman, aka "Super Hunky". I've been around the off-road scene since right after the earth cooled. In the process, I've accumulated some odd bits of knowledge and have become horribly opinionated. Creator/Editor/Publisher of Dirt Bike magazine; Editor of Off-Road Magazine; Off-Road Editor of Old Bike Journal; Raced in every Barstow to Vegas event from 1968; Trophied the Blackwater 100 a few times; Raced in Europe, Japan, Peru, Guatemala & Mexico; Competed in over 1000 dirt bike races; Crashed my brains out too may times to count Articles by Rick Sieman

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Source: Dirtbike at Off-Road.com, 3/1/2004
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