Triumph Engine and Frame Numbers

Engine Frame numbers

1937 to 1949

The year and model were used as a prefix to the engine number

From 1937 to 1939 the final digit ( 7, 8 or 9 ) was used.

From 1946 to 1949 the final two figures ( 46, 47, 48 or 49.)

The model numbers were T or 5T for the Speed Twin, T100 for Tiger 100, 3T for 350 twin & TR5 for Trophy.

Typical numbers were thus:

8-T-1234 ( 1938 Speed Twin )

47-5T-23456 ( 1947 Speed Twin )

9-T100-45678 ( 1939 Tiger 100 )

Pre-war frames ( 1937 / 39 ) used the prefix TH for the 500cc models ( 5T & T90 ) and TF for the Tiger 100.

Engine numbers commenced at:

1946 - 72000

1947 - 79046

1948 - 88782

1949 - 100762

1950 to 1962 Pre-Unit 500 & 650cc

Engine numbers had a prefix indicating the model type along the lines above such as 3T, 5T, 6T, T100, T110, 3TA, 5TA etc. This was followed by a number from the list below.

YEAR - Pre-Unit 500 & 650cc

1950 - From 100N

1951 - 101NA to 15808NA

1952 - 15809NA to 25000NA then 25000 to 32302

1953 - 32303 to 44134

1954 - 44135 to 56699

1955 - 56700 to 70929

1956 - 70930 to 82799 then 0100 to 0944

1957 - 0945 to 011115

1958 - 011116 to 020075

1959 - 020076 to 029363

1960 - 029364 to 030424 then D101 to D7726

1961 - D7727 to D15788

1962 - D15789 on

1963 to 1968 Unit 650cc

1963 - DU101 to DU5824

1964 - DU5825 to DU13374

1965 - DU13375 to DU24874

1966 - DU24875 to DU44393

1967 - DU44394 to DU66245

1968 - DU66246 to DU90282

1957 to 1968 Unit 350 & 500cc

1957 - H101 to H760

1958 - H761 to H5484

1959 - H5485 to H11511

1960 - H11512 to H18611

1961 - H18612 to H25251

1962 - H25252 to H29732

1963 - H29733 to H32464

1964 - H32465 to H35986

1965 - H35987 to H40527

1966 - H40528 to H49832

1967 - H49833 to H57082

1968 - H57083 to H67331

Frame number prefix :

Rigid - 3T = TC

Rigid - 5T, T100, 6T, TR5 = TF

Swing Arm - all pre-unit = S

Swing Arm - '21' = H

1969 onwards

Note: The engine number is located on the left side of the engine immediately below the cylinder barrel flange. The number is stamped onto the raised pad.

The frame number is stamped on the left side of the frame, on the front engine mounting lug.

The first letter indicates the month of manufacture as follows:-

A - January

B - February

C - March

D - April

E - May

G - June

H - July

J - August

K - September

N - October

P - November

X - December

The second letter indicates the season year of manufacture as follows :-

C - 1969

D - 1970

E - 1971

G - 1972

H - 1973

J - 1974

K - 1975

N - 1976

P - 1977

X - 1978

A - 1979

B - 1980

The third section is a numerical block of five figures which commence with engine number 00100.

The fourth section indicates the model.

Example: NC00100T120R - N=Month C=Year, Number, T120R=Model.