Engine Numbers
Check these locations:
Below the barrel stamped into the crankcase. On the front of the engine
stamped either side of the crankcase join. Below the clutch / transmission
area. Rear of cases below carburettor area.
Frame Numbers.
By far the most common location is on the steering head. It may also
be found on one of the rear downtubes or on the front downtubes.
Other locations include: top tube below fuel tank; lower frame rails; swing-arm pivot area.
Bennetts has an excellent page on the subject.
AJS and Matchless
Jampot has sections on serial numbers.
The AJS Matchless Club UK
Ariel Serial Numbers
redhunter.com/ariel/aomcc_prefix.htm
BMW Engine & Frame Numbers
Post-1969
BMW 650 numbers
BMW Motorcycle Serial Numbers 1923 to 1969 at benchmarkworks
BMW motorcycle model, year and VIN errors
BSA Serial Numbers
Pre-war frame numbers are located on the front top frame member either near the front seat stay or near the steering head.
1950s models have the numbers located on the front downtube, either below or in front of the fuel tank. An exception to this is the early Bantams where the frame number is between the front engine mounting plate. ~ classicenglishbikes.com/
BSA Frame Numbers at BritBike.com
BSA Dating
BSA at sunnymeadcycles (PDF)
sunnymeadcycles.com/files/BSA_ID.pdf
BSA Frame & Engine Numbers
classicenglishbikes.com
BSA C15 Serial Numbers
classicmotorcycles.org.uk/c15/c15_serial_numbers.htm
DKW
DKW Vehicle Identification
http://dkw-geyer.com/DKW-Geyer/e/technik/ftp.htm
DKW NZ350 Serial Numbers
http://www.dkw-nz.net/cms/upload/img_pdf_downloads/database.pdf
Dot
Dot frame numbers at DMC UK
Francis-Barnett
Frame & Engine Numbers
James
Lambretta
http://www.scooterhelp.com/serial/serial.numbers.html
Maico
Maico Numbers at Maico Madness
Maico Code Definitions
Montesa
Montesa Numbers
Motobecane Mobylette 1968: Forward of the rear wheel axle on left side.
Moto Guzzi
Frame Numbers at mgcn.nl
V-twin frame numbers at Ozebook
Norton
Norton Numbering System
Norton Serial Numbers at Bikelinks
http://www.sunnymeadcycles.com/files/Norton_ID.pdf
http://www.bmh.com.au/norton/
Norton Engine Numbers 1945-1975
NSU
NSU Max - (1)
Parilla
nornet.on.ca parilla
nornet.on.ca parilla 3
Penton
Penton
Identification - KTM, Sachs & Puch engine information
pentonmotorcycles.com/
Peugeot
petochonsdulion.net/Afficher_Noserie.html
Also Automoto, Griffon and Meteore
Puch (See also Sears Allstate)
Puch moped chassis numbers Includes links to pages covering MS, MV, VS, VZ, SR, SRA and RL
Sachs
See also under Penton
Sachs 98ccm
Modell 1932
Royal Enfield
Royal Enfield Serial Numbers at Bikelinks
Terrot Serial Numbers
Triumph
Triumph Engine & Frame Numbers 1950-1988 at britishspares.com
Triumph Serial Numbers at BritishOnly.com
Velocettte
Velocette LE Engine
& Frame Numbers
Velosolex
Velosolex
engine serial numbers
Vespa Identification
Villiers
Zundapp
Netherlands Serial Numbers
Web archive of motormuseum-lexmond.nl
France
Les numéros d'immatriculation de la belle époque (1901-1928)
"September 16, 1901 begins the first French registration system. The management of this system is carried out by the Mines Department, upon receipt of the vehicle. This service is divided into fifteen administrative regions (maps) called mineral districts, the one of Marseille including in the first years the 3 regions of North Africa (Algeria, Morocco and Tunisia) as well as Monaco.
