Wiring Diagrams for Norton & Triumph Motorcycles

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    Diagram Name  --  Diagram  Description
  Norton Motorcycles
Norton A -- Atlas, G15CS, Manxman, S.S., & 12 Volt Twin Magneto Ignition Models.     One Page.
Norton B -- 750cc Commando.  Made Prior to 1971.   One Page.
Norton C -- 750cc Commando. 1971   One Page.
Norton D -- 850cc Commando MkII. 1972 to 1974.   One Page.
Norton E -- 850cc Commando MkIII. All Years.   One Page.

  Triumph Motorcycles

TR500 68/69 -- 12v Ignition Separate Headlamp, with Engine Number H57083 THROUGH H67331. 1968 to 1969.   One Page.
TR500 70/on -- Twin Motorcycles with 12V Ignitions from Engine Number KD27850. 1970 forward.   One Page.
TR650 63/65 -- 12 Volt Coil Ignition, Zenner Diode, 2 Rate Charge Control.  Engine #DU101 TO DU24875. 1963 to 1965.   One Page.
TR650 66/67 -- 12 Volt Coil Ignition, Separate Headlamp, from Engine Number DU44394 TO DU66245. 1963 to 1965.   One Page.
TR650 68/69 -- Twin Motorcycles with Engine Numbers Between DU66236 AND DUXXXXX. 1966 to 1967.  One Page.
TR650 69/72 -- Engine numbers begin with NCXXXXX through HG30870. 1968 to 1969.   One Page.
TR650 72/on -- Engine numbers begin with JHXXXXX through the end of model production. 1973 forward.   One Page.
TR750 -- For all 750cc Twins.   One Page.  One Page.
T150 -- Triumph Trident.  1969 to 1974.   One Page.

 

        Triumph Twin Engine & Frame Numbers - Unlocking the Mystery.  (My thanks to the BBC for the following info).

  1950 through 1969:

  Year Unit 350cc & 500cc

Pre-unit 500cc & 650cc

  
  1950 n/a From 100 N  
  1951 n/a 101NA - 15,808NA  
  1952 n/a 15,809NA - 25,000NA then 25,000 - 32,302  
  1953 n/a 32,303 - 44,134  
  1954 n/a 44,135 - 56,699  
  1955 n/a 56,700 - 82,799  
  1956 n/a 70,930 - 011,115 then 0100 - 0944  
  1957 H101 - H760 0945 - 011,116  
  1958 H761 - H5,484 011,116 - 020,075  
  1959 H5,484 - H11,511 020,076 - 029,363  
  1960 H11,512 - H18,611 029,364 - 030,424 then D101 - D7726  
  1961 H18,612 - H25,251 D7,727 - D15,788  
  1962 H25,252 - H29,732 D15,789 on Unit 650cc  
  1963 H29,733 - H32,464 DU101 - DU5,824  
  1964 H32,465 - H35,986 DU5,825 - DU13,374  
  1965 H35,987 - H40,527 DU13,375 - DU24,874  
  1966 H40,528 - H49,832 DU24,875 - DU44,393  
  1967 H49,833 - H57,082 DU44,394 - DU66,245  
  1968 H57,083 - H65,572 DU66246 - DU85,903  
  1969 H65,573 - H67,331 DU85,904 - DU90,282  
         

1969 Forward:

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 the model season year, followed by a number which began at 00,100 for each model year and on irrespective of the model it was stamped on (Bonneville, Tiger, etc).  The model season started in August.

For example, a bike manufactured in December of 1971 might be numbered XE11,111.

First letter (month of manufacture):

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 Period 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 - August 1981 1981
DA May 1981 - February 1982 1982
EA February 1982 - January 1983 1983

 

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