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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 02-20-2010, 09:23 PM   #1 (permalink)
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VIN number pre unit

I have a 1956 Pre Unit the vin# on the motor is only 8 digits. All the other later meriden Bikes I have have a 16 digit vin #.
Does anyone know If the older bikes from the 50"s only had 8 numbers.
FYI There are no numbers on the frame?

Thanks Chris
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Old 02-21-2010, 12:22 AM   #2 (permalink)
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The number of digits on a pre-unit engine number vary from year to year and within years. A model may start as low as 101 and go to 5 digits. Along with the model designation it can be 5 to 8 or 9 digits. It in noway follows later practice with standardized VIN layouts. And if your frame has no numbers you have a problem! They should be on the upper left side of the frame on the steering head casting.
Robbie
iumph - Twins 1950 - 69 Year Engine No. Unit 350 & 500cc Engine No. Pre-Unit 500 & 650cc

Engine & frame numbers on these models were all the same & were preceded by the model code. The N suffix was used in 1950 & NA for 1951/2. 350/500 twins all used an H prefix. The 650 models with the duplex frame used a D prefix & unit 650 duplex used a DU prefix. Additional suffixes were used to designate model type or condition eg. TT (model type), C (high compression) or P (police). Some of these only appeared in certain markets.
1950 From 100N
1951 101NA - 15808NA
1952 15809NA - 25000NA, then 25000 - 32302
1953 32303 - 44134
1954 44135 - 56699
1955 56700 - 70929
1956 70930 - 82799, then 0100 - 0944
1957 H101 - H760 0945 - 011115
1958 H761 - H5484 011116 - 020075
1959 H5485 - H11511 020076 - 029363
1960 H11512 - H18611 029364 - 030424, then D101 - D7726
1961 H18612 - H25251 D7727 - D15788
1962 H25252 - H29732 D15789 on
Engine No. Unit 650cc
1963 H29733 - H32464 DU101 - DU5824
1964 H32465 - H35986 DU5825 - DU13374
1965 H35987 - H40527 DU13375 - DU24874
1966 H40528 - H49832 DU24875 - DU44393
1967 H49833 - H57082 DU44394 - DU66245
1968 H57083 - H65572 DU66246 - DU85903
1969 H65573 - H67331 DU85904 - DU90282

Triumph Twins, Triples & Singles - 1969-1983 Letter Month Model Year

During 1969 a new number system was introduced which used a two-letter prefix indicating month & year, followed by the model type & the serial number. The first letter is the month, the second the year. This system used the Triumph model year not calendar year, which ran from August of the previous year to July of the current year. From July 1980 a third letter A was added to allow the system to keep going. Many model types included a V which designates a 5 speed gearbox.

For example: T140V HK12345 - is a 5 speed T140 model built in July of model year 1974/75.

Also; T140E NDA12345 - Is a T140E model built in October of model year 1982.
A January Aug 1978 - July 1979
B February Aug 1979 - July 1980
C March Aug 1968 - July 1969
D April Aug 1969 - July 1970
E May Aug 1970 - July 1971
G June Aug 1971 - July 1972
H July Aug 1972 - July 1973
J August Aug 1973 - July 1974
K September Aug 1974 - July 1975
N October Aug 1975 - July 1976
P November Aug 1976 - July 1977
X December Aug 1977 - July 1978
KDA 1981 models Sept 1980 - Apr 1981
EDA 1982 models May 1981 - Jan 1982
BEA 1983 models Feb 1982 - Jan 1983
T140V AEA34393 - Last model Jan 21st, 1983

Harris Twins - 1985-1988 Year Engine & Frame Number
The easiest of the lot. The numbers were used for both Bonneville & Tiger models irrelevant of model type. 1985 FN000002 - FN000191
1986 GN000192 - GN000788
1987 HN000789 - HN001176
1988 JN001177 - JN001258

Last edited by Rubone; 02-21-2010 at 12:28 AM.
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Old 02-21-2010, 08:46 AM   #3 (permalink)
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vin numbers

Dude I appreciate your effort I have the same list of numbers you posted up. It is a great triumph reference especially if you like meriden bikes.
I have a TR6710932 on frame and engine
Does anyone know if there should be more numbers?
Or is this 8 digit code the complete vin number for a Pre Unit.
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Old 02-21-2010, 09:23 AM   #4 (permalink)
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Based on what Rubone provided it looks correct. The only thing that seems odd is the number itself. Are you sure that's not TR67 70932 (7 instead of a 1)? That would fall into the range of numbers for a 1956.

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Old 02-21-2010, 09:47 AM   #5 (permalink)
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vin #

I appreciate the effort
How about just reply if you have an answer.
My bike is a 56
it is a tr6 the next 5 numbers are a 5 digit sequnce starting with 71 So I know it is a 56 thunderbird ot trophy I am going to assume its a thunderbird because of some pinstipiping that was on the tank and oil bag was indicitive of other tbirbs I have had and the trophy never had it.

I have 1 simple qusestion are these 8 digits vin numbers viable or do I need a 16 or 17 digit vin.

No comments just answers please
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Old 02-21-2010, 10:22 AM   #6 (permalink)
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Triumph never had 16 or 17 digit VIN numbers.

PERIOD.
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Old 02-21-2010, 11:10 AM   #7 (permalink)
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Quote:
Originally Posted by GrandPaulZ View Post
Triumph never had 16 or 17 digit VIN numbers.
Well not until Hinkley came along. Maybe this is what Cjlima is referring to? Modern Vin's are of that size.
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Old 02-21-2010, 11:18 AM   #8 (permalink)
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epynt - This is the "Classic, Vintage & veteran" section.

The question regarded a Pre-Unit Meriden TR6 Triumph.

My answer is as crystal-clear as it could possibly be.

cjlima - The tone of your last post won't help elicit courteous responses.
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Last edited by GrandPaulZ; 02-21-2010 at 11:20 AM.
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Old 02-21-2010, 11:54 AM   #9 (permalink)
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Quote:
Originally Posted by cjlima View Post
I have 1 simple question are these 8 digits vin numbers viable or do I need a 16 or 17 digit vin.
GPZ - I was trying to answer Cjlima's question. He is asking if 1956 bike should also have a modern 16 or 17 digit VIN number as well as the the 8 digit number he has located. The answer to this is no. Only modern bikes and cars have the 16/17 digit number.
I can see why he is getting frustrated.
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Old 02-21-2010, 12:56 PM   #10 (permalink)
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The question was answered in the first paragraph of my response, that a pre-unit vin contains no more than the numbers listed in the chart for the year range and the model designation. PERIOD. NO MORE DIGITS. But for some reason that isn't good enough so I am done.
Robbie
'50 6T
'51 6T
'53 T100
'54 T110
'58 TR6
Among others!
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