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 Norton - Model 18
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Norton D2-492-71-01
Photo ou archives : F-M. Dumas
7101

Capacity : 500
Model : Model 18
Production : 1929 -
Category : (R) Street Bike
   

NORTON

500 Model 18 - 1929

The fastest machine on the market

The Norton Model 18 debuted at the 1922 Paris Salon and was the dominant sports bike of the 1920s. It remained the fastest production bike on the market for many years. With a minimum of preparation, it gave works riders Alec Bennett, Joe Craig and Stanley Woods victory in major international events until1927, when it was replaced by the sohc Norton CS1. The other riders who distinguished themselves on the Model 18 were Italian stars Tazio Nuvolari and Achille Varzi.

James L. Norton's Last Model

The Model 18 was powered by the last engine designed by the marque's founder, James Lansdowne Norton. Its engine dimensions and gearbox were the same as the famed 16H, but the valves were operated by pushrods and rockers.

Confirmation

The prototype caused a sensation at Brooklands in 1922, when Rex Judd covered the flying kilometer at 98.4 mph. To uphold the Model 18's claim to be the fastest on the market, Norton organized a test in 1927, asking the ACU – the governing body for British motorcycle sports – to choose six engines from the production line at random. They were sealed, shipped to Brooklands and mounted in the appropriate frames. Observed officially by the ACU, the six engines were timed at over 80 mph. The Model 18 was updated each year – in 1929, it gained the saddle-tank along with a rudimentary foot-selector for the gearbox. The Model 18 was produced until 1954.

SPECIFICATIONS

Engine: 490cc (79x100mm) air-cooled single-cylinder four-stroke

Power Rating: 20 hp @ 5000 rpm

Valves: overhead

Fuel System: Amal carburetor

Transmission: Sturmey-Archer close-ratio 3-speed, chain primary and final drives

Suspension: Webb girder forks with center spring (front); rigid (rear)

Brakes: 7 inch drum (front); 8 inch drum (rear)

Wheels: 19 inch (front & rear)

Weight: 340 lb

Maximum Speed: 82 mph

The 490cc Norton Model 18 single was the most handsome machine of the 1920s, particularly in the original saddle-tank version of 1929.


Motorcycle encyclopedia Moto Passion, realised by François-Marie Dumas, include almost 2000 photos presented with an exhaustive history of the motorcycles exhibited.

This unique collection has been realised with the participation of many specialists. With many thanks in particular to Yves Campion, Michael Dregni, Didier Ganneau, Jean Goyard, Helmut Krackowizer, Michel Montange, Christian Rey, Bernard Salvat, Mick Woollett, etc

One can order here

  • Original cards on paper (in french)
  • High resolution scans or original documents presented and signed with my name.

Please contact me at info@moto-collection.org for conditions and copyright.




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