1952 Norton Manx

1952 NORTON MANX BACKGROUND
The Norton Manx was developed in 1937, in both SOHC and DOHC form, to compete in and win the Isle of Man TT. Before fully developed, World War II intervened, and production of the Manx was delayed until 1946. The Manx quickly gained a reputation for its speed and reliability, allowing it to dominate the motorcycle Grand Prix racing and the Isle of Man TT for decades.

1952 NORTON MANX DESIGN
The Manx engine has an aluminum alloy cylinder block and head with a single overhead camshaft (SOHC) driven by a vertical shaft and bevel gears. They were hand assembled engines. The 1948 Norton Manx was the first to benefit from telescopic front forks and massive twin leading shoe (TLS) front brakes. 1949 was the first year for the Norton Manx Grand Prix models, purpose-built for road racing, and in 1950, they introduced the legendary “Featherbed Frame”. It was made of all-welded steel tubing instead of the common practice of heavy cast iron brazed lugs. It saved weight and made the bike lighter, and they handled like nothing else on the market. The 1952 Norton Manx was the last to use the ‘long-stroke’ engine. The following year, the engine received a major rework using a shorter stroke (86mm) and larger bore (85.6mm) making the ratio nearly “square”.


1952 Norton Manx SPECIFICATIONS


Engine type

Displacement

Bore & Stroke

Compression

Carburetor

Ignition

Engine Output

Primary Drive

Clutch

Gearbox

Final Drive

Frame type

Wheelbase

Suspension, F

Suspension, R

Brake, F

Brake, R

Weight

Top Speed

500 MANX                      

Air-cooled DOHC single

499cc

79.62mm X 100mm

8.6:1

Amal GP, 1-7/32"

Lucas magneto

47 bhp @ 6500 rpm

Chain

Multi-plate, wet

4-speed, R-foot shift

Chain

Featherbed

56.0"

Telescopic, oil damped

Swing arm, 2 dampers

TLS 8" drum

SLS 7" drum

310 lbs / 180 kg

130 mph / 210 kph

350 MANX                 

Air-cooled DOHC single

348cc

71mm X 88mm

9.0:1

Amal GP, 1-1/8"

Lucas magneto

35 bhp

Chain

Multi-plate, wet

4-speed, R-foot shift

Chain

Featherbed

56.0"

Telescopic, oil damped

Swing arm, 2 dampers

TLS 8" drum

SLS 7" drum

310 lbs / 180 kg

115 mph / 185 kph



MORE NORTON PAGES:
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.....Norton Manx
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.....Interview with a Norton Expert


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Norton Motorcycles: From 1950 to 1986 (British Motor cycles since 1950)



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Norton



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The Illustrated History of Norton Motorcycles (English and Spanish Edition)



Norton (Osprey Collector's Library)



Norton Dominator Performance Portfolio 1949-1970



History of Norton Motorcycles



Norton: The Complete History (Crowood MotoClassics)


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