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British
Motorcycle Engine and Frame Identification Chart
Triumph - 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 |
| Norton Year Codes |
Code |
Year |
Code |
Year |
Code |
Year |
| Year codes were used for all models between 1946 & 1960. |
A |
1946 |
F |
1951 |
L |
1956 |
| B |
1947 |
G |
1952 |
M |
1957 |
| C |
1948 |
H |
1953 |
N |
1958 |
| D |
1949 |
J |
1954 |
P |
1959 |
| E |
1950 |
K |
1955 |
R |
1960 |
| Norton Model Codes |
Code |
Model |
Code |
Model |
| In addition; suffix D indicates de luxe twin, suffix SS indicates Sports Special twin, suffix Q indicates quietening ramp cams (some 1947 singles) |
2 |
16H |
122 |
88 |
| 3 |
18 |
13 |
50 |
| 3T |
500T |
14 |
99 |
| 4 |
ES2 |
15 |
77 & Nomad |
| 6 |
19R |
16 |
Nomad |
| 7 |
Big 4 |
17 |
Jubilee |
| 8 |
16H or Big Four plunger |
18 |
All 650 twins |
| 9 |
19S |
19 |
Navigator |
| 10 |
International 40 |
20 |
Atlas |
| 10M |
Manx 40 |
20M3 |
Commando (distributor) |
| 10M2 |
Manx 40 Featherbed |
20M3S |
Commando (camshaft points) |
| 11 |
International 30 |
50 |
AMC 50 |
| 11M |
Manx 30 |
ES |
Electra |
| 11M2 |
Manx 30 Featherbed |
ES2 |
AMC ES2 |
| 12 |
Model 7 |
|
|
| Norton Serial Numbers |
Year |
No. |
Year |
No. |
Year |
No. |
| Some overlap of numbers occurred from one model year, or calendar year, to the next, some these numbers are approximate only & relate to the year's end. |
|
Also, Electra: |
| July 1963 - 650 |
| Sept. 1964 - 6201 |
| Aug 1965 - 7961 |
|
1945 |
1001 |
1956 |
66600 |
1967 |
119760 |
| 1946 |
2131 |
1957 |
71360 |
1968 |
124300 |
| 1947 |
7756 |
1958 |
77400 |
1969 |
130000 |
| 1948 |
13792 |
1959 |
80488 |
1970 |
134700 |
| 1949 |
20701 |
1960 |
87038 |
1971 |
141700 |
| 1950 |
27100 |
1961 |
94500 |
1972 |
200001 |
| 1951 |
35560 |
1962 |
101060 |
1973 |
212278 |
| 1952 |
42700 |
1963 |
105000 |
1973 |
300000 (850) |
| 1953 |
48900 |
1964 |
108000 |
1974 |
307311 |
| 1954 |
55350 |
1965 |
111650 |
1975 |
325000 (MkIII) |
| 1955 |
60700 |
1966 |
115870 |
|
125001 (frame) |
| BSA
- B Range - B31 & B33 |
Year |
B31 Engine |
B33 Engine |
Rigid Frame |
Spring Frame |
|
1946 |
XB31-101 |
|
XB31-101 |
|
| 1947 |
XB31-101 |
XB33-101 |
XB31-101 |
|
| 1948 |
YB31-101 |
YB33-101 |
YB31-101 |
|
| 1949 |
ZB31-101 |
ZB33-101 |
ZB31-101 |
ZB31S-101 |
| 1950 |
ZB31-9001 |
ZB33-4001 |
ZB31-9001 |
ZB31S-5001 |
| 1951 |
ZB31-15001 |
ZB33-7001 |
ZB31-14001 |
ZB31S-10001 |
| 1952 |
ZB31-21001 |
ZB33-11001 |
ZB31-19001 |
ZB31S-17001 |
| 1953 |
BB31-101 |
BB33-101 |
BB31-101 |
BB31S-101 |
| 1954 |
BB31-6001 |
BB33-2001 |
BB31-1386 |
BB31S-5895 |
|
BB31-6001 |
BB33-2001 |
|
CB31-101 |
| 1955 |
BB31-15001 |
BB33-5001 |
|
BB31S-12001 |
|
BB31-15001 |
BB33-5001 |
|
CB31-6001 |
| 1956 |
BB31-22001 |
BB33-7301 |
|
EB31-101 |
| 1957 |
BB31- |
BB33- |
|
EB31- |
| 1958 |
GB31-101 |
GB33-101 |
|
FB31-101 |
| 1959 |
GB31-1909 |
GB33-662 |
|
FB31-2572 |
| 1960 |
|
GB33-1001 |
|
GB33-101 |
| BSA Unit Twins, 1962-65 |
1962 Eng./Frame |
1963 Eng./Frame |
1964 Eng./Frame |
1965 Eng./Frame |
| A50 |
A50-101/A50-101 |
A50-823/A50-2288 |
A50A-101/A50-5501 |
A50A-686/A50-8437 |
| A50 (Police) |
|
|
A50AP-101/A50-5501 |
A50AP-121/A50-8437 |
| A50C (USA) |
|
|
A50B-101/A50B-101 |
A50D-101/A50B-4001 |
| A50CC (USA) |
|
|
|
A50B-507/A50B-4001 |
| A50C & A50CC (UK) |
|
|
|
A50DC-101/A50B-4001 |
| A65 |
A65-101/A50-101 |
A65-1947/A50-2288 |
A65A-101/A50-5501 |
A65A-1134/A50-8437 |
| A65 (Police) |
|
|
A65AP-101/A50-5501 |
A65AP-267/A50-8437 |
| A65R |
|
|
A65B-101/A50-5501 |
A65B-334/A50-8437 |
| A65R (Rev counter) |
|
|
A65C-101/A50-5501 |
A65C-1082/A50-8437 |
| A65T/R |
|
|
A65B-101/A50-5501 |
|
| A65L/R |
|
|
A65D-101/A50B-101 |
A65D-1742/A50B-4001 |
| A65SH |
|
|
A65E-101/A50B-101 |
A65E-701/A50B-4001 |
| A65L & A65LC |
|
|
|
A65DC-2158/A50B-4001 |
|
|
|
|
|
| BSA Unit Twins, 1966-69 |
1966 Engine |
1967 Eng. & Frame |
1968 Eng. & Frame |
1969 Eng. & Frame |
| A50 Royal Star |
A50R-101 |
A50RA-101 |
A50RB-101 |
A50RC-101 |
| A50 Wasp |
A50W-101 |
A50WA-101 |
A50WB-101 |
|
| A65 Thunderbolt |
A65T-101 |
A65TA-101 |
A65TB-101 |
A65TC-101 |
| A65 Lightning |
A65L-101 |
A65LA-101 |
A65LB-101 |
A65LC-101 |
| A65 Hornet |
A65H-101 |
A65HA-101 |
|
|
| A65 Firebird |
|
|
A65FB-101 |
A65FC-101 |
| A65 Spitfire |
A65S-101 |
A65SA-101 |
A65SB-101 |
|
| Frame No. - All Models |
A50C-101 |
|
|
|
| BSA Models 1969 On |
Code |
Month |
Code |
Month |
Code |
Month |
| First Letter |
A |
January |
E |
May |
K |
September |
|
B |
February |
G |
June |
N |
October |
|
C |
March |
H |
July |
P |
November |
|
D |
April |
J |
August |
X |
December |
|
|
Code |
Model Year |
Code |
Model Year |
| Second Letter |
C |
August 1968 - July 1969 |
F |
August 1971 - July 1972 |
|
D |
August 1969 - July 1970 |
G |
August 1972 - July 1973 |
|
F |
August 1970 - July 1971 |
|
|
|
|
Model Year |
Model Codes |
|
1969-70 |
D175, D175B, B25S, B44SS, B44VS, A50R, A65T, A65L, A65F, A75 |
|
1971 |
D175, B25SS, B25T, A65FS |
|
1971-72 |
B50SS, B50T, A65T, A65L, A75, A75V |
|
1971-73 |
B50MX |
|
1972 |
A70L |
|