AJS Model 20500

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Ajs-model-20-47-012.jpg
AJS Model 20
Manufacturer
AJS
Also called Model 20500, Model 20 500
Production 1948 - 61
Engine
Four stroke, parallel twin cylinder, OHV. 2 valve per cylinder, Crankshaft: 3-saved plain bearing / roller bearing
Compression ratio 7.3:1
Top Speed 150 km/h / 93 mph
Ignition Lucas magneto, K2F
Spark Plug KLG FE80, 14 mm thread
Transmission 4 Speed
Frame Single cradle
Suspension Front: Hydraulic telescopic fork
Rear: Dual chocks
Brakes Front: Drum
Rear: Drum
Front Tire 3.25 -18
Rear Tire 3.25 -18
Weight
Oil Capacity 2.5 L / 5.3 US pt
Fuel Capacity 17 L / 4.5 US gal
Manuals Service Manual


It could reach a top speed of 150 km/h / 93 mph.

Engine[edit | edit source]

The engine was a Air cooled cooled Four stroke, parallel twin cylinder, OHV. 2 valve per cylinder, Crankshaft: 3-saved plain bearing / roller bearing. The engine featured a 7.3:1 compression ratio.

Drive[edit | edit source]

Power was moderated via the Multi Plate (dry, Burman).

Chassis[edit | edit source]

It came with a 3.25 -18 front tire and a 3.25 -18 rear tire. Stopping was achieved via Drum in the front and a Drum in the rear. The front suspension was a Hydraulic telescopic fork while the rear was equipped with a Dual chocks. The Model 20500 was fitted with a 17 L / 4.5 US gal fuel tank.

Photos[edit | edit source]

AJS Model 20 AJS Model 20 AJS Model 20

Overview[edit | edit source]

AJS Model 20 500












Make Model. AJS Model 20 500
Year 1948 - 61
Engine Type Four stroke, parallel twin cylinder, OHV. 2 valve per cylinder, Crankshaft: 3-saved plain bearing / roller bearing
Displacement 498 cc / 30.4 cu in
Bore X Stroke 66 x 72.8 mm
Compression 7.3:1
Cooling System Air cooled
Oil Capacity 2.5 L / 5.3 US pt
Induction Carburetor
Ignition Lucas magneto, K2F
Spark Plug KLG FE80, 14 mm thread
Starting Kick
Clutch Multi Plate (dry, Burman)
Max Power 21.6 kW / 29 hp
Transmission 4 Speed
Final Drive Chain
Frame Single cradle
Front Suspension Hydraulic telescopic fork
Rear Suspension Dual chocks
Front Brakes Drum
Rear Brakes Drum
Front Tire 3.25 -18
Rear Tire 3.25 -18
Weight 178 kg / 392 lbs
Fuel Capacity 17 L / 4.5 US gal
Top Speed 150 km/h / 93 mph