Motorcycle Engine Serial Number Lookup
This document currently will help you identify from 1923 to 1975 Norton Models. Pre-war Models were manufacted from 1923 to 1939. Pre-war Models are identified by their Engine Serial numbers. These numbers can be found in Table 4.
Ă— Close Finding the Engine Serial Number The engine serial number is stamped into the side of the engine. All Honda engine serial numbers have a 4 or 5 letter prefix followed by a 7 digit number. Technical information on Villiers engine serial numbers. Villiers Engine Indentification. 036A 10D 3 Speed DMW 125 Comp 1951 030D AC Cars 1955-67.
Post-war models are denoted from year 1945 on. Post-war Serial Numbers consist of three parts. First a Model Number (Table 2), second a letter code (Table 3), and last a unique number (Table 1). Serial Numbers are found on the Frame and Engine.
The Serial Numbers on the Frame and Engine from 1945 to 1974 should match. The serial numbers from 1960 to 1945 should include a year letter code.
Engine Numbers:
The Engine Numbers are found on the front of the crankcase or on the left-hand crankcase just below the cylinder. The engine number may include the engine dimensions, especially on the singles with the 79X100 mm bore and stroke.
Frame Numbers:
Feather Bed Frames: The serial numbers are located on the primary case side, rear frame gasset (below to the rear swing arm bolt). The Model code is written horizontal with the year letter (if one is present) and the unique number is written vertically.
Commando Frames: The serial numbers on the Commando Frames are numbered on a plate rivited to the headstock.
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Small Twins (ie Jubilee):The frame numbers are stamped on the right-hand frame lug which carried the rear fork up to 1963. From then on, it was on the pillion footrest bracket.
Other Frames: The serial numbers are on the headstock.
When trying to date a engine/frame, the year code letter is the most useful up to 1960. The serial numbers have been known to have some overlap from one model year, or calender year, to the next. There are some exceptions to this. The unique numbers written in Table 1 below indicte year end values.
Both Frame and Engine Serial Numbers (Table 1)
| 1946 | 2131 | ' | |
| ' | 1947 | 7756 | ' |
| ' | 1948 | 13792 | ' |
| ' | 1949 | 35560 | ' |
| ' | 1950 | 42700 | ' |
| ' | 1951 | 48900 | ' |
| ' | 1952 | 55350 | ' |
| ' | 1953 | 60700 | ' |
| ' | 1954 | 66600 | ' |
| ' | 1955 | 71360 | ' |
| ' | 1956 | 77400 | ' |
| ' | 1959 | 80488 | ' |
| ' | 1960 | 87038 | ' |
| ' | 1961 | 94500 | ' |
| ' | 1962 | 101060 | ' |
| ' | 1963 | 105000 | ' |
| Atlas (code 20) | Feb 1964 | 108000 | First Atlas |
| ' | Sept 1964 | 111377 | -- |
| ' | 1966 | 115871 | -- |
| ' | 1967 | 120323 | -- |
| ' | May 1967 | 121307 | N15CS |
| ' | May 1967 | 121307 | Concentrics Carbs & coil ignition |
| ' | May 1967 | 121665 | P11 |
| ' | Aug 1967 | 123364 | -- |
| ' | Jan1968 | 124372 | P11A |
| ' | Sept 1968 | 128646 | P11A Ranger |
| ' | Nov 1968 | 129145 | Last Ranger |
| Commando 750cc | Aug 1967 | 123666 | First Model |
| ' | Feb 1968 | 126125 | First Production Machine |
| ' | Mar 1969 | 131180 | Fastback |
| ' | Mar 1969 | 131257 | S with Camshaft Points |
| ' | Sept 1969 | 133668 | Fastback withcamshaft points |
| ' | Sept 1969 | 134108 | First wolverhampton engines (P-suffix) |
| ' | Mar 1970 | 135140 | Roadster |
| ' | June 1970 | 135088 | Last S |
| ' | Sept 1970 | 139571 | Fastback MK II |
| ' | Jan 1971 | 141717 | Last Fastback MK II |
| ' | Jan 1971 | 141783 | Fastback MK III |
| ' | Jan 1971 | 142583 | Roadster MK II |
| ' | Mar 1971 | 145234 | SS |
| ' | Apr 1971 | 144343 | Fastback LR |
| ' | May 1971 | 146074 | Hi-Rider |
| ' | Oct 1971 | 150723 | Last SS |
| ' | Jan 1972 | 200001 | Fastback MK IV |
| ' | Jan 1972 | 200001 | Roadster MK IV |
| ' | Jan 1972 | 200001 | FastbackLR MK IV |
| ' | Jan 1972 | 200001 | Hi-Rider MK IV |
| ' | Jan 1972 | 200001 | Interstate |
| 750cc | --- | 200976 | First Combat Engine |
| ' | --- | 211110 | First Detuned |
| ' | 1973 | 212278 | Interstate |
| ' | Mar 1973 | 220000 | Roadster MK V |
| ' | Mar 1973 | 220000 | Hi-Rider MK V |
| ' | Mar 1973 | 220000 | Interstate MK V |
| ' | Oct 1973 | 230935 | Last 750cc Commando |
| Commando 850 | Apr 1973 | 300000 | First 850 |
| ' | Sept 1973 | 306591 | MK IA 850 |
| ' | Jan 1974 | 307311 | Mk II and IIA 850 |
| ' | Feb 1975 | F12001 | Frame number MK III |
