Triumph Motorcycle Engine & Frame Serial / VIN Numbers

So, you've got a vintage Triumph motorcycle but you aren't sure what year it is, or you want to identify a swap meet frame or engine along with other Triumph motorcycle parts and don't know how to look up or decode the serial or VIN numbers? If so, the information below will be a big help.

Make sure you order correct parts for your Triumph, find part numbers conversions listed with a letter prefix. The prefix to the Triumph serial numbers conveniently identify the model of the motorcycle. Some letters designate certain features, such as:

• The 'V' denoting a 5-speed transmission, versus the earlier, standard 4-speed gearbox.
• An 'R' can denote a right-hand shift motorcycle, as in the TR7RV.
• The letter 'C' can denote a Competition model, as in the TR6C.

Triumph Model Designation

PREFIX MODEL T140V 750cc Bonneville, 5-speed gearbox T140C 750cc Trophy T140E 750cc Bonneville TR7V 750cc Tiger TR7RV 750cc Tiger, right-hand shift, 5-speed gearbox T120R 650cc Bonneville T120RV 650cc Bonneville, right-hand shift, 5-speed gearbox TR6C 650cc Trophy TR6CV 650cc Trophy, 5-speed gearbox TR6R 650cc Tiger TR6RV 650cc Tiger, right-hand shift, 5-speed gearbox T100R 500cc Daytona, dual carburetor T100C 500cc Tiger or Trophy, single carburetor T100C 500cc Tiger 100 or Trophy, single carburetor T100S 500cc Tiger 100 T90 350cc Tiger 90 6T 650cc Thunderbird T150 750cc Trident, three cylinder (triple) T150V 750cc Trident, three cylinder (triple), 5-speed gearbox T160V 750cc Trident, three cylinder (triple), 5-speed, electric start

- Please note the triumph serial number identification.

Triumph Twin Serial Numbers 1950 - 1969

YEAR Unit 350 & 500cc Pre Unit 500 & 650cc 1950 ------ from 100 N 1951 ------ 101NA - 15808NA 1952 ------ 15809NA - 2500NA then 25000 - 32302 1953 ------ 32303 - 44134 1954 ------ 44135 - 56699 1955 ------ 56700 - 82799 1956 ------ 70930 - 011115 then 0100 - 0944 1957 H101 - H760 0945 - 011116 1958 H761 - H5484 011116 - 020075 1959 H5484 - H11511 020076-029363 1960 H11512 - H18611 029364 - 030424 then D101 - D7726 1961 H18612 - H25251 D7727 - D15788 1962 H25252 - H29732 D15789 on 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 Twin Serial Numbers 1969 - 1983

During the rich and colorful history of Triumph, the models produced after 1969 contained the same prefix designators listed above, that indicated the model type, but the numbers were changed. A new coding system (numbers) was introduced using a two letter prefix for the month and model season year, followed by a number which began at 00100 for each model year and ran on irrespective of the model it was stamped on. The model season started in August.

A January B February C March D April E May G June H July J August K September N October P November X December Letter Months Designated Year C October 1968 - July 1969 1969 D August 1969 - July 1970 1970 E October 1970 - July 1971 1971 G August 1971 - July 1972 1972 H August 1972 - June 1973 1973 J August 1973 - October 1974 1974 K April 1974 - June 1975 1975 N July 1975 - June 1976 1976 P June 1976 - August 1977 1977 X July 1977 - August 1978 1978 A July 1978 - November 1979 1979 B August 1979 - July 1980 1980 DA August 1979 - July 1980 1980 DA September 1980 - April 1981 1981 DA May 1981 - February 1982 1982 EA February 1982 - January 1983 1983

Here the most comprehensive Triumph model Table from 1950 to 1983, Engine and frame numbers matched, and all models used the same number sequence. If you already know the Triumph motorcycle engine numbers, you should probably learn how to Install your Triumph Hardtail in the coolest!