Harley Engine Serial Numbers

There are two tables listed here. The first is 'Frame ID Numbers - 1981 and Later.' This information was originally posted (13 Mar 1996) by Dan Kloch

(kloch@nrcdec.nrc.state.ne.us)

and was then updated (13 Nov 1996) by Cheezie to include 1993-96 bikes. The second table is 'Motorcycle ID Numbers 1970-1980.' And was added by Dan on 22 Nov 1996. Thanks to those busy guys!

Terry's Tech - Harley VIN Numbers. The engine number is the VIN and is located on left case. There are no frame numbers until the 1970 model year.

  1. This is the Harley Davidson VIN decoder. Every Harley Davidson car has a unique identifier code called a VIN. Engine and transmission. Last decoded VIN numbers.
  2. Finding out what year a Harley Davidson engine was made can be important for a number of reasons. However, decoding an engine's vehicle identification number can be challenging and confusing.

Frame ID Numbers - 1981 and Later

Example: 1HD1AAK11BYO13478
The frame number is broken
down like this:
1 HD 1 AA K 1 1 B Y 013278
1 = Made in U.S.A.
HD = Harley Davidson
1 = Weight Class
1 = Heavyweight
4 = Lightweight
8 = Sidecar
AA = Model Designation
K = Engine Displacement
K = 1340 Shovelhead
H = 1000 Ironhead XL
L = 1340 Evolution
M = 883 Evolution XL
N = 1100 Evolution XL
P = 1200 Evolution XL
1 = Introdution Date
1 = Regular Introdution
2 = Mid-Year (January)
3 = California Special
4 = Daytona (March)
1 = Check Digit
B = Model Year
B = 1981 C = 1982
D = 1983 E = 1984
F = 1985 G = 1986
H = 1987 J = 1988
K = 1989 L = 1990
M = 1991 N = 1992
P = 1993 R = 1994
S = 1995 T = 1996
U = 1997
Y = Plant of Manufacture (York, PA)
T = Plant of Manufacture (Tomahawk, WI)
J = Plant of Manufacture (Milwaukee, WI)
013278 = Sequential Number
FL/FX Models
AA FLH - 80
AB FLHP - 80 Chain
AC FLH - 80 Shrine Chain
AD FLH - Classic
AG FLH - Classic w/ sidecar
AH FLHP - 80 Belt Deluxe
AJ FLH - 80 Heritage
AK FLHS - 80
AL FLH - 80 Shrine Belt
BA FXE - 80
BB FXEF - 80
BC FXS - 80
BD FXB - 80
BE FXWG - 80
BF FXSB - 80
BG FXDG
BH FXST
BJ FLST/FLSTC
BK FXSTC
BL FXSTS
BM FLSTF
BN FLSTN
BP FXSTSB
FLT/FXR Police Models
DA FLHTP - Windshield 1984 and later
DF FLHTP - Fairing
ED FXRP - Windshield
EF FXRP - Fairing
EK FXRP - C.H.P.

FLT/FXR Models
AE 1981 FLT
AF 1981 FLTC
DA FLT 1982 and 1983 only
DB FLTC
DC FLHT
DD FLHTC
DE FLHTC w/ Sidecar
DG FLHTC Shrine
DH FLTC w/Sidecar
DJ FLHTC 1986 - present
DK FLTC Shrine
DM FLTCU - Ultra
DN FLTCU - Ultra w/Sidecar
DP FLHTCU - Ultra
DR FLHTCU - Ultra w/Sidecar
DS FLTCU - Ultra Shrine
DT FLHTCU - Ultra Shrine
EA FXR
EB FXRS
EC FXRT
EE FXRDG
EG FXRS-SP Sport Edition
EH FXRD
EJ FXRC
EL FXLR
EM FXRS - CON
FA FLHS
FB FLHR-I Injected
FC FLHTCU-I Injected
FD FLHR
FE FLTCU-I Injected
FF FLHTC-I Injected

How to Identify Harley VIN Numbers

When buying any used Harley-Davidson, checking the Harley VIN numbers against the title is mandatory. If they do not match exactly you should think about looking elsewhere. Typographical errors on motorcycle registrations are sometimes very common, but don’t take any chances. In some cases a visit to your local department of motor vehicles may be enough to get a VIN typo corrected. However, when buying a Harley or other vehicle with an out of state title, the difficulty in correcting such errors increases dramatically. With strict state regulations increasing every year, you are better off avoiding any problem that may leave you holding a piece of property that cannot be documented. Not only is it illegal to drive, but you leave yourself open to unscrupulous people who could make a legal claim against you and your property.


If you have a Harley engine with matching title taken from a crashed or salvaged motorcycle, and put that engine into a new frame, the title is invalid. Anyone trying to sell you a post-1970 Harley where the title VIN only matches the engine, but does not match the number on the frame, PASS! Want to upgrade your bike to a new custom frame? You must apply for a new title. While it is nice to have an original Harley with matching engine and frame numbers, only the frame VIN is relevant when it comes to legal registration.


Never accept a Harley or other vehicles without a legal title. One such case involved an individual restoring a Harley originally purchased without proper papers. Some deadbeat and his lawyer came along and claimed the Harley was his. Without enough money to pay an attorney, and lacking any legal title or receipts, the poor guy was forced to give the bike to this shark in order to avoid a lawsuit. This may sound like extortion but it happens all the time. Don’t become another horror story. Take precautions when investigating the authenticity of the Harley VIN and registration.


There has always been much debate over bikes with matching numbers and their true value. In my opinion, any Harley being sold as “rare” or “limited” is usually anything but that. As with beauty, value and rarity are often in the eye of the beholder. If matching numbers makes a motorcycle more valuable to you, then only you can put a value on it. Just don’t expect the next person buying that Harley from you to think the same way.


Locating the Harley VIN

Prior to 1961 On Harley models prior to 1961, the engine number acts as the VIN. This number can be found on the left side engine case. Harley models produced prior to 1969 do not carry any frame number.
VIN Numbering Conventions:
  • First two numbers are the model year.
  • Letters (up to four) are the model designation.
  • The last numbers are the production run number.

1962 – 1969
VIN Numbering Conventions:
  • First two numbers are the model year.
  • Letters (2-4) are the model designation.
  • The last numbers are the production run number.
Harley Engine Serial Numbers
In addition, models with 4 digit production numbers have an even-numbered first digit for even years, odd for odd years. Models containing a 5 digit production number will have the first two digits even for even years, odd for odd years.
Why is this important? If the VIN does not follow this even or odd numbering sequence, you can almost guarantee that the VIN has been altered. It is extremely common to find mismatched engines in these early bikes with different VIN numbers than the title paperwork. 1970 – 1980:
Beginning in 1970, Harley started stamping VIN numbers on both the frame and engine case. The exception as noted by our friends at Cyborg Cycles, is the 1979 model . This exception is discussed below.
  • First two numbers are the model code.
  • Next 5 digits, position 3-7 is the production run number.
  • The last 2 digits designate the year.

Harley Engine Serial Number Decoder

The only legal VIN number for Harley’s produced after 1970 is on the frame. NO EXCEPTION! It doesn’t matter if the engine case number matches your registration papers, if the frame VIN doesn’t match the registration you have a problem! You might be able to fool a few cops or even someone at the DMV, but don’t count on it. In addition, it should go without saying that any alteration to the VIN is illegal. This goes for restamping frames or adding the original VIN to a replacement frame. If you replace the frame, you need to have a new VIN assigned to your Harley.

Always remember that on models built after 1970, the Harley VIN always follows the frame… not the engine!



The infamous 1979 Exception
Engine serial numbers for harley davidsonDuring the 1979 model run, some Harley’s were produced with engine numbers that did not match the frame number. The production date is reported to be from 1/9/79 – 2/7/79, and the frame VIN’s affected are 43000H9 through 48199H9. These models had engines numbered with a separate “crankcase number” instead of the frame’s VIN. This engine number is reported to be a ten digit numeric ID. Rumor has it that Harley went back to the old numbering sequence once the legal ramifications were realized. Regardless of the engine case number, the title must always match the frame VIN. Thanks to Cyborg Cycles for this information.
1981 -2000:
Beginning in 1981, Harley started using a 17 digit VIN number on the frame and an abbreviated VIN on the engine case. As always, the legal title must match the VIN number on the frame. If the title and frame VIN reads

Harley Engine Serial Numbers Meaning

1HD1ELK12BZ123456 , the engine case number should read something like ELKB123456 . VIN number rules described under the 1970 – 1980 Harley models also apply here.


Harley VIN Model Year Designations


Prior to 1970
the model year appeared in the last 2 digits of the Harley VIN. From

Harley Engine Serial Number Lookup

1970 to 1980 Harley used an alphanumeric year code. The code “H” is followed by the last number of the year (i.e. 1971= H1, 1972= H2). The exception is 1980 which was J0.
1981 to 2000 model big twins
Single letter in the 10th digit designates the model year.
1981 – B1986 – G1991 – M1996 – T
1982 – C1987 – H1992 – N1997 – V
1983 – D1988 – J1993 – P1998 – W
1984 – E1989 – K1994 – R1999 – X
1985 – F1990 – L1995 – S2000 – Y

Harley VIN Model Codes

Big Twins

As if things weren’t confusing enough, Big Twin’s have a different set of model designations in the Harley VIN depending on whether they are a 4 speed or 5 speed model. 1970 thru 1980 4 Speed Big Twin The first 2 digits of the Harley big twin’s VIN digits are the model code.
1A = FL/FLP 12002F = FXS 12005H = FLHS – 807H = FLH 1200 Police
1H = FXB – 802H = CLE – 806E = FXEF – 808H = FLH 1200 Shrine
1K = FLH – 80 shrine3G = FLH – 806G = FXE – 809D = FXE 1200
2A = FLH 12003H = FLH – 80 Classic6H = FL – 809G = FXWG – 80
2C = FX 12005E = FXEF 12007G = FXS – 809H = FLH – 80 Police


Example: 3G 12345H1 is an FLH

Harley engine serial number location

1980 5 Speed Big Twin

Harley 1980 5 Speed’s used code 5G

1981 thru 1985 4 Speed Big Twin The 5th and 6th digits designate the model code.
AA = FLH – 80AL = FLH – 80BE = FXWG – 80
AB = 80 police chainBA = FXE – 80BF = FXSB – 80
AC = FLH – 80 Shrine chainBB = FXEF – 80BH = FXST
AH = FLHP – 80 Police BeltBC = FXS – 80BG = FXDG – 80
AK = FLHS – 80BD = FXB – 80BK = FXSTC

Example: 1HD1 BE K11BY123456 is a FXWG 1981 5 Speed Harley Big Twin The 5th and 6th digits designate the model code.
AE= FLTAF= FLTC

Example: 1HD1 AF K11BY123456 is a FLTC 1982 thru 2002 5 Speed Big Twins The 5th and 6th digits designate the model code.
BH = FXSTDJ = FLHTCFE = FLTCU-I
BJ = FLSTCDK = FLTC ShrineFF = FLHTC-I
BK = FXSTCDM = FLTCUFG = FLHTCU-I W/SC
BL = FXSTSDP = FLHTCUFH = FLHP-I Police
BM = FLSTFEA = FXRFJ = FLHP Police
BN = FLSTNEB = FXRSFL = FLHTCU-I Shrine
BP = FXSTSBEC = FXRTFM = FLHTP-I Police
BR = FLSTSED = FXRP Police windshieldFP = FLTR
BS = FXSTDEF = FXRP Police FairingFR = FLHRC-I
BT = FXSTBEG = FXRS-SPFS = FLTR-I
DA = FLT 82 – 83EH = FXRDFT = FLHPE-I (California)
DA = FLHTP Police WindshieldEJ = FXRCGA = FXDB-D
DB = FLTCEK = FXRP Police C.H.P.GB = FXDB-S
DC = FLHTEL = FXLRGC = FXDC
DD = FLHTEM = FXLR ConvGD = FXDL
DE = FLHTC W/sidecarFA = FLHSGE = FXDWG
DF = FLHTP Police FairingFB = FLHR-IGG = FXDS Conv
DG = FLHTC ShrineFC = FLHTCU-IGH = FXD
DH = FLTC W/sidecarFD = FLHRSG = TLE Police
SH = RLE Police
Example: 1HD1 BH K11GY123456 is a FXST

Sportster VIN Numbers

1970 thru 1980 Sportsters First two digits of the Harley VIN are the model code.
3A = XL or XLH4A = XLCH4E =- XLS
2G = XLT4D = XLA7F = XLCR

Example: 4A 12345H1 is a XLCH 1981 to 1985 Sportsters 5th and 6th digits are the model code.
CA = XLHCB = XLSCC = XLXCD = XR1000

Example: 1HD1 CD HY15B123456 is a XR1000 1986 to 1996 Sportsters 5th, 6th and 7th digits are the model code.
CAM = XLH883CAN = XLH1100CEM = XLH883 Hugger
CAP = XLH1200CGP = 1200 CustomCFM = XLH883 Deluxe
CHP = 1200 Sport

Example:1HD1 CEM 15GY123456 is a XLH883 Hugger

Confused yet? See Model Number page for a description of Harley model numbers.


Stolen Harley 110 Engine Serial Numbers

Enjoy the ride!

Harley Engine Serial Number Decoder

Note that the information provided here is the intellectual property of Harley-Performance.com and may not be reproduced or distributed without the express written permission of the owner. Models covered do not include late models after 2009.