Engine numbers

The greatest name in British motorcycles dates from 1901, when James Lansdowne Norton began building motorcycles with French and Swiss engines.

Engine numbers

Postby Welsh Wizard » Fri Jun 26, 2009 9:32 pm

The year codes for Nortons from 1946 on.
A 1946
B 1947
C 1948
D 1949
E 1950
F 1951
G 1952
H 1953
J 1954
K 1955
L 1956
M 1957
N 1958
P 1959
R 1960

Model codes
2 16H
3 18
3T 500T
4 ES2
6 19R
7 Big 4
8 16H or Big 4 Plunger
9 19S
10 International 40
10M Manx 40
10M2 manx 40 featherbed
11 International 30
11M manx 30
11M2 Manx 30 Featherbed
12 Model 7
122 88
13 50
14 99
15 77 & Nomad
16 Nomad
17 Jubilee
18 All 650 Twins
19 Navigator
20 Atlas
20M3 Commando ( distributor)
20M3S Commando ( Camshaft points )
50 AMC 50
ES Electra
ES2 AMC ES2

Suffix D indicates DeLux Twin
Suffix SS indicates Sports Special Twin
Suffix Q indicates quietening ramp cams ( some 1947 singles)


Serial numbers for engine and frames from 1945 0n

1945 1001
1946 2131
1947 7756
1948 13792
1949 20701
1950 27100
1951 35560
1952 42700
1953 48900
1954 55350
1955 60700
1956 66600
1957 71360
1958 77400
1959 80488
1960 87038
1961 94500
1962 101060
1963 105000
1964 108000
1965 111650
1966 115870
1967 119760
1968 124300
1969 130000
1970 134700
1971 141700
1972 200001
1973 212278
1973 300000 (850 numbers intro)
1974 307311
1975 325000 (Mk III ) 125001 (frame)

Electra July 1963 650
Sept 1964 6201
Aug 1965 7961

Please note that years overlap as engine and frame numbers do not run from Jan to Dec but part way through the year.
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