Confused on VIN numbers

[hawghd1]

In an earlier post someone stated that triumph never put vin numbers on the downtube. Can someone please clarify this for me? I picked up a 1972 triumph and need to ID the frame and engine numbers. It's a mismatched mutt. Frame- T140VAH 24XXX and engine- TR6C EE 20XXX. Can someone tell me what I have here? Is there a website for Triumph ID's? Thanks

[Rubone]

Triumph ALWAYS stamped their frames. If you heard otherwise you were misinformed. And the engine and frame numbers originally matched with the exception of the engine having a model number on earlier units. On your '72 they should be the same. There are lots of places for Triumph ID info on the web. Just google them like I just did!
The T140V means the frame is for a 750 Bonneville twin with 5 speed, your engine is a Tr6 650 4 speed.
Here is a basic one to help you.
http://www.sfvintagecycle.com/1/post...-decoder1.html

[Cass]

Dear hawghd1
According to all my books Your frame is for a 750 5 speed made A for Jan. H for 1973. The engine is a TR6 650 with high pipes Made E for May E for 1971. Hope this helps you out.
Cass
Senior Field Judge for Brits
AMCA #10592

[Steve Slocombe]

Dear All, if you think you've got a matching numbers bike, the British VMCC has the build records for most British bikes. They are at www.vmcc.net. For a fee you can get a certificate showing the entry for your bike in the build records, with frame and engine numbers plus accessories etc. as dispatched from the factory.

[Ohio-Rider]

This may be some help I.D.ing what you have.

T140DBA= T140=(750cc) (D=Bonneville) (B=Febuary) (A=1979)

## MODEL VERSION ##
A US MKT - ROAD (1960)
B US MKT - COMPETITION (1960)
R US MKT - ROAD (SOME YRS UK)
RT US MKT - ONLY 750 MADE (1970)
C US MKT - COMPETITION
V FIVE SPEED GEARBOX
E CONFORMS TO US ENVIRON. REGS.
ES ELECTRIC START
D BONNEVILLE SPECIAL (1979-1980)
TSS EIGHT VALVE ENGINE
TSX US STYLE CUSTOM
LE LIMITED EDITION ROYAL (1982)
AV ANTI VIBRATION (POLICE FRAME)

PREFIX LETTERS SUFFIX LETTERS
## MONTH ##
A JANUARY
B FEBUARY
C MARCH
D APRIL
E MAY
G JUNE
H JULY
J AUGUST
K SEPTEMBER
N OCTOBER
P NOVEMBER
X DECEMBER

## YEAR ##
C 1969
D 1970
E 1971
G 1972
H 1973
J 1974
K 1975
N 1976
P 1977
X 1978
A 1979
B 1980
KDA 1981
EDA 1982
BEA 1983
## MONTH YEAR SERIAL # VERSION
X A 123456 E
Meriden Bonneville
SERIAL NUMBERS
T120 650cc 1958 - 1972
T140 750cc 1973 - 1983