TRIUMPH
Motor & Frame Numbers
By: David Gaylin
SIDE-VALVE SINGLES
SEASON ENGINE NUMBERS FRAME NUMBERS
1905
1906
 from 001 followed by day and month of manufacture
(25-1 translates to January 25th)
1907
end at 2200
end at 126700
1908
2201 to 4212
126701 to 138890
1909
4213 to 7822
138891 to 151800
1910
7823 to 11415
151801 to 155374
1911
11416 to 6852
155375 to 190327
1912
16853 to 22913
190328 to 196100
1913
22914 to 29348
211408 to 219430
1914
29349 to 37666
219431 to 262338
MODEL H MILITARY ISSUE
SEASON ENGINE NUMBERS FRAME NUMBERS
1915
37667 to 41560
262339 to 266200
1916
41561 to 47140
266201 to 274600
1917
47141 to 52980
274601 to 280540
1918
52981 to 59300
280541 to 286950
1919
59301 to 67150
286951 to 306470
(civilian frames begin at 301978)
1920
67151 to 74244
306471 to 313732
1921
74245 to 80067
313733 to 319672
1922
80068 to 84673
319673 to 324136
1923
84674 to 95000
324137 to 335000
Note: From 1915 to 1923 some engine numbers were followed by a three letter code.
These relate to a dating code by which the month and year of manufacture cand be indentified.
The code is as follows:

TRIUMPH CODEX
T R I U M P H C O D E X
1 2 3 4 5 6 7 8 9 10 11 12
A 'UTP' prefix ( or suffix) would translate as 4/16 or April 1916.
This code does not apply after 1923.
JUNIOR 2-STROKE MODELS
SEASON
ENGINE NUMBERS
FRAME NUMBERS
1913
01 to 109
194877 to 194883
1914
110 to 790
256191 to256876
1915
791 to 1885
256879 to257970
1916
1886 to 2487
257971 to 258534
1917-18
2488 to 2620
258535 to 258726
1919
2621 to 3660
258727 to 259534
1920
3661 to 5928
259535 to 600475
1921
5929 to 7896
600476 to 603029
1922
7897 to 8364
602562 to 603029
1923
8365 to 10550
603030 to 651000
250 cc begins at 8501
ALL SINGLE CYLINDER MODELS
SEASON ENGINE NUMBERS MODEL FRAME NUMBERS
1924
91704 to 99745
 
328223 to 340888
1924
201 to 1078
LS Models
536016 to 536610
1925
99746 to 104288
 
340889 to 341883
1925
1079 to 1664
LS Models
536611 to 537357
1926
104289 to 106763
 
341834 to 346315
1926
from 1665
 
537358 to 537502
1926
225295 to 248755
P&Q Models
922939 to 944001
1927
106764 to 109500
 
346316 to 347500
1927
248756 to 256000
P&Q Models
944002 to 970000
1927
from 100001
N&QA Models
944002 to 970000
1927
from 120001
TT Model
from 700001
1927
from 400001
W Model
from 610001
1928
from 500001
N Deluxe
from 200001
1928
from 300001
NSD Model
from 200001
1929 to 1953 MODELS
SEASON ENGINE NUMBERS FRAME NUMBERS
Model NT
F1001
E100I
Model ND
E1001
E100I
Model NM
A1001
E1001
Model WO
B1001
B1001
Model WL
C1001
B1001
Model CSD
from 600001
from 800001
Model CN
from 700001
from 800001
Model CO
from 800001
from 800001
Model NSD
from 91001
from 91001
Model CA
from CA1001
 
Model CD
from CD1001
 
Scout A
from L1001
from K1001
Scout B
from K1001
from K1001
Scout BS
from KS1 001
from K1001
Model X (1931-32)
Engine prefix X
frame prefix X
Model Z (1932)
Engine prefix Z
frame prefix X
Model XO
XO as prefix or suffix to engine number.
 
1934 MODELS
MODEL PREFIX
2/1 (250cc)
prefix 1R4
2/5 (250cc)
prefix 5R4
3/1 (350cc)
prefix IT4
3/2 (350cc)
prefix 2T4
3/5 (350cc)
prefix 5T4
5/1 (500cc)
prefix 1S4
5/2 (500cc)
prefix 2S4
5/3 (500cc)
prefix 3S4
5/4 (500cc)
prefix 4S4
5/5 (500cc)
prefix 5S4
5/10 (500cc)
prefix 1 OS4
6/1 (650cc)
prefix 1 V4
Model XO5 (150cc) XO as prefix or suffix to engine numbers.
Model XO7 (175cc) XO7 as prefix or suffix to engine numbers.

1935 and 1936 MODELS
SEASON MODEL ENGINE NUMBERS FRAME NUMBERS
1935
Model U2/1
Engine prefix IL5
frame L
1936
Tiger-70
Engine prefix T-1 L6
frame SI
1936
Tiger-80
Engine prefix T-2T6
frame SI
1936
Tiger-90
Engine prefix T-5S6
frame SII
Note: 1935 and 1936 Models same as 1934, only final number or prefix changes to "5' for 1935 and'6' for 1936.
1937 to 1939 MODELS
Year and model shown as prefix to engine number.
For example 8-T-33445 is a 1938 Speed Twin (later identified as "5T" instead of just "T". Frame prefixes were-TH"for early Speed Twin. 'TF' for the TI00 and later 39/40 Speed Twin.
1940 to 1949 Models
SEASON ENGINE NUMBERS FRAME NUMBERS
1946
from 72000
prefixed as before
1947
from 79046
prefixed as before
1948
88864 to 102235
TFI 5001 to TF2500
1949
102236 to 113386
TF25001 to TF33615
Year shown in engine number prefix with two figures. For example 40-5T-26445 is a 1940 Speed Twin. This practice followed religiously and some single prefixes may appear on postwar models. Frame prefixes were 'TL" for the 3T up to 1948 and TC for 1949. TR5 for 1949 was TC followed by a 'T" after the actual number. All other frames were TF. TR5 models did not have seperate number seriers but ran concurrently with all other models. I.E. 112671 was last '49 TR5 and I1 3386 the last '49 5T.
Note: All Grand Prix T-1 00's have leter 'R" suffix following engine and frame numbers.
TR5 models had seperate number series; engines from 101001 to 106424, frames from TC11001-T to TC13107-T.
By 1950 frame and engine numbers were matching.
MILITARY
Wartime singles undated but identified by 3HW, 3SW, or 5SW prefix.
TRW Military 500cc Side-Valve Twins
YEAR Engine Numbers
1950
14401N-14459N
1951
6044NA - 1432ONA
1952
22001NA - 22838NA
1953
22839NA - 23273NA
1954
23274NA - 23322NA
1955
23323NA - 23597NA
1956
23598NA - 25447NA
1957
25448NA - 27127MA
1958
27128NA - 27175NA
1959
27176NA - 27346NA
1960
27347NA - 27645NA
1961
27646NA - 28185NA
1962
28186NA - 28464NA
1963
28465NA - 28827NA
1964
28828NA - 29605NA

1950 TO CURRENT (Engine and frame numbers match)
DATE T15/20 Unit 350/500 Pre-unit 500/650
1950
 
 
1001N to 1616ON
1951
 
 
101NA to 15808NA
1952
 
 
15809NA to 25000NA (then) 25000 to 32303 (no suffix)
1953
 
 
32304 to 44821 (no suffix)
1954
101 to 8517
 
44822 to 56699 ( no suffix)
1955
8518 to 17388
 
56700 to 70929 (no suffix)
1956
17389 to 26275
 
70930 to 82797 (then)0101 to 0944
1957
26276 to 35846
H101 to H760
0945 to 011165
1958
35847 to 45311
H761 to H5484
011166 to 020075
1959
45312 to 59359
H5485 to HI 1511
020076 to 029633
1960
59360 to 69516
H11512 to H18611
029634 to 030424 TWIN DOWN TUBE FRAME
1960
 
 
(then) D101 to D7726
1961
69517 to 81889
H18612 to H25251
D7727 to D15788
1962
81890 to 88346
H25252 to H27932
D15789 to D20308 UNIT CONSTRUCTION ENGINE
1963
88347 to 94599
H27933 to H32464
DU101 to DU5824
1964
94600 to 99719
H32465 to H35986
DU5825 to DU13374
1965
99720 onwards
H35987 to H40527
DU13375 to DU24874
1966
101 onwards
H40528 to H49832
DU24875 to DU44393
1967
 
H49833 to H57082
DU44394 to DU66245
1968
 
H57083 to H65572
DU66246 to DU85903
1969
 
H65573 to H67330
DU85904 to DU90282
1969
Mid '69 number change
(then) XC06297to HC24527
(then) NC00100 to HC24346
1970
 
HD27850 to KD60280
JD24848 to ND60540
1971
 
KE00001 to HE25250
NE01436 to HE30869
1972
 
JG32303 to GG59646
 
1973
 
JH15597 to DH31460
JHI5101 to GH36466
1974
 
HJ56408 to JJ58103
JJ58014 to NJ60061
1975
 
 
DK61000 to GK62248
1976
 
 
HN62501 to GN72283
1977
 
 
GP73000 to JP84931
1978
 
 
HX00100 to JXI0747
1979
 
 
HA11001 to PA24608
1979
XB24609 to 24790 XB date code used in error, should be XA
 
XB24609 to XB24790
1980
 
 
PB25001 to KB275
1981
 
 
KDA28001 to DDA29427
1982
 
 
EDA30001 to BDA31693
1983
 
 
BEA33001 to AEA34389
 
 
 
 
DEVON TWINS
1985
 
 
FN000002 to FN000191
1986
 
 
GN000192 to GN000788
1987
 
 
HN000789 to HN001176
1988
 
 
JN001177 to JN001258

NOTE: From 031701 (zero prefix added) October 10,1981 thru 032213 January 1, 1983 motorcycles for
U.S. market were prefixed 'CM' with no date code.
Done to overcome some export restrictions which dating could have caused problems.