Engine and Frame Numbers


Ariel


Year Model Engine Prefix Frame Prefix
(1939 rigid - spring)
1926 Heavyweight P P
1927 Heavyweight V V
1928 Heavyweight W W
1929 Heavyweight H H
1929 Lightweight L L
1930 Heavyweight K K
1930 Lightweight M L
1931 250cc J J
1931 350cc A J
1931 VB. VF. N N or K
1931 SB. SF. SG. S S
1931 4F 500 R R
1932 250cc
350cc
VB. VG. VH.
SB. SG.
4F 500
4F 600
E
B
C
D
R
T
B or D
B
C or D
D
T
T
1933 250cc
350cc
500cc. 557cc
4F 600
DA
BA
CA
TA
Y
Y or E
Y
Y
1934 250cc
350cc
500cc.557cc
4F 600
EA
FA
GA
UA
Y
Y
Y
Y
1935 250cc
350cc
500cc. 557cc
4F 600
HA
JA
KA
WA
Y
Y
Y
Y
1936 250cc
350cc
500cc. 600cc
4G1000cc ohv
4F 600 ohc
AB
BB
CB
DB
XB
F
F
F
P
Y
1937 250cc
350cc
500cc. 600cc
4G1000 ohv
4F 600 ohv
AC
BC
CC
DC101-615
EC
XF
XF
XF
P
P
1938 250cc

350cc
500cc. 600cc
1000cc
1000cc

AD

BD
CD
DC616-650
DD

XG

XG
XG
P
P

1939 250cc

350cc
500cc. 600cc
4G & 4H 1000cc
4F 600 ohv

AE

BE
CE
DE
EE

M ---

XG BX
XG BX
P AX
P AX

1940 250cc

350cc
500cc. 600cc
4G, 4H 1000 cc
4F 600 ohv

AH

BH
CH
DH
EH & EEH

M ---

XG BX
XG BX
P AX
P AX

1941 - 5 350cc W/NG BH, NBH, RBH XG ---
1946 - 7 350cc

500cc, 600cc
1000cc
1000c

BK

CK
DH268, 273 - 6
DK

AP or BP ---
BP ---
P ---
XP AX
1948 350cc
500cc, 600cc
1000cc
500cc Twin
AJ
BJ
CJ
PT
BP BX
BP BX
XP AX
DX CX
1949 350cc

500cc, 600cc
500 VCH
1000cc
500 Twin

DJ

EJ
CO
FJ
HT

RF SF

RF SF
COM SF
GR GS
HH HS

1950 350cc

500cc, 600cc
500 VCH
500cc Twin
1000cc

KL

MN
CO
OP
JJ

AB AC

AB AC
COM or AB AC
GD LL
TD CW

1951 350cc

500cc, 600cc
500 VCH
500 Twin
1000cc

RA

RB
CO
RC
RD

WA SA

WA SA
COM or WA SA
WB SB
WC SC

1952 350cc TB OA SD
1952 500cc, 600cc TC OA SD
1952 500 VHA TCA OA SD
1952 500 VCH TR OR ----
1952 500 Twin TE OB SE
1952 1000cc TM OC SV
1953 350cc NH

500cc VH
600cc VB
500cc VHA
500cc VCH
500cc KH Twin
500cc KHA Twin
1000cc4G MK.1
1000cc4G MK.2

XA

XC
VB (NOT XB)
XD
XE
XF
XFA
XH
XJ

AM AS

AM AS
AM AS
AM AS
MA (NOT AM) ---
BW BS
BW BS
---- ES
EJ ES

1954 200cc LH
350cc NH
500cc VH
600cc VB
500cc KH
650cc FH
1000cc 4G MK.2
500cc HS
500cc HT
PA
PB
PD
PE
PH
PJ
PL
PS
PD or PT
---- KN
KW KS
---- KS
KW VS(NOT KS)
BW KS
---- KS
---- KR
---- KSS
KT or TF ----
1955 200cc LH

350cc NH
500cc VH
600cc VB
500cc KH
650cc FH
500cc HT
500cc HS
1000cc 4G

LA

LB
LC
LD
LE
LF
LJ
LK
GL

--- LS

--- DU
--- DU
RF DU
--- DU
--- DU
TF ---
--- KSS or DUS
--- PS

1956 200cc LH

350cc NH
500cc VH
600cc VB
500cc KH
650cc FH
500cc HS
500cc HT
1000cc 4G

ALA

MA
MB
MC
MD
MLF
MH
MJ
ML

MT

PR
PR
PR
PR
PR
PRS
RT
GM

1957 200cc LH

350cc NH
500cc VH
600cc VB
500cc KH
650cc FH
500cc HS
500cc HT
350cc HT3
1000cc 4G

BLA

AMA
AMB
AMC
AMD
NLF
NH
NJ
AMA
NML

ST

APR
APR
APR
APR
APR
PRS
RT
RT
GM

1958--9 200cc LH
350cc NH
500cc VH
600cc VB
650cc FH
500cc HS
500cc HT
350cc HT3
1000cc 4G
CBLA
CAMA
CAMB
CAMC
CNLF
CNH
CNJ
TH
CNML
CST
CAPR
CAPR
CAPR
CAPR
CPRS
CRT
CRT
CGM

Triumph


Twins from 1950 to 1969

YearUnit 350 & 500Pre-Unit 500 & 650
1950from 100N
1951101NA-15808NA
195215809NA-25000NA,
then 25000-32302
195332303-44134
195444135-56699
195556700-70929
195670930-82799,
then 0100-0944
1957H101-H7600945-011115
1958H761-H5484011116-020075
1959H5485-H11511020076-029363
1960H11512-H18611029364-030424,
thenD101-D7726

BSA Unit Twins 1962-1965


A50 A50 (Police) A50C (USA) A50CC (USA) A50C & A50CC (UK) A65 A65 (Police) A65R A65R (Rev counter) A65T/R A65L/R A65SH A65L & A65LC
1962 Engine
Frame
A50-101
A50-101
A65-101
A50-101
1963 Engine
Frame
A50-823/A50-2288 A65-1947
A50-2288
1964 Engine
Frame
A50A-101
A50-5501
A50AP-101
A50-5501
A50B-101
A50B-101
A65A-101
A50-5501
A65AP-101
A50-5501
A65B-101
A50-5501
A65C-101
A50-5501
A65B-101
A50-5501
A65D-101
A50B-101
A65E-101
A50B-101
1965 Engine
Frame
A50A-686
A50-8437
A50AP-121
A50-8437
A50D-101
A50B-4001
A50B-507
A50B-4001
A50DC-101
A50B-4001
A65A-1134
A50-8437
A65AP-267
A50-8437
A65B-334
A50-8437
A65C-1082
A50-8437
A65D-1742
A50B-4001
A65E-701
A50B-4001
A65DC-2158
A50B-4001