AJS S Series 1931

The AJS S Series 1931 was a range of motorcycles produced by AJS Motorcycles of Wolverhampton, England. The range consisted of three models: the S1, S2, and S3. All three models were powered by a 348 cc (21.3 cu in) single-cylinder engine. The S1 was the base model, with a rigid frame and no rear suspension. The S2 had a rigid frame with rear suspension, and the S3 had a sprung frame with rear suspension.

The S Series was a popular range of motorcycles, and was used by both civilian and military riders. The S3 was particularly popular with the military, and was used by the British Army during the Second World War.

Engine

The AJS S Series 1931 was powered by a 348 cc (21.3 cu in) single-cylinder engine. The engine was a four-stroke, air-cooled unit with a bore and stroke of 79 mm × 98 mm (3.1 in × 3.9 in). The engine was fitted with a single carburettor and a magneto ignition system. The engine produced 12 horsepower (9 kW) at 4,000 rpm.

Transmission

The AJS S Series 1931 was fitted with a three-speed gearbox. The gearbox was a hand-operated unit with a foot-operated clutch. The gearbox was mounted in the engine crankcase.

Frame

The AJS S Series 1931 was available with two different frame types: a rigid frame and a sprung frame. The rigid frame was made of steel, and the sprung frame was made of a combination of steel and rubber. The sprung frame was designed to provide a more comfortable ride than the rigid frame.

Suspension

The AJS S Series 1931 was available with two different suspension systems: no rear suspension, and rear suspension. The rear suspension was provided by a pair of adjustable friction shock absorbers. The front suspension was provided by a girder fork.

Brakes

The AJS S Series 1931 was fitted with two brakes: a front brake and a rear brake. The front brake was a drum brake, and the rear brake was a foot-operated drum brake.

Wheels and tyres

The AJS S Series 1931 was fitted with 19-inch wheels. The wheels were made of steel, and the tyres were made of rubber.

Performance

The AJS S Series 1931 was capable of a top speed of 60 mph (97 km/h). The acceleration from 0 to 50 mph (80 km/h) was 10 seconds.

Fuel consumption

The AJS S Series 1931 had a fuel consumption of 70 mpg (4.1 L/100 km).

Price

The AJS S Series 1931 was priced at £55 for the S1, £60 for the S2, and £65 for the S3.

Make AJS
Model S SERIES
Year 1931
Pages 14
Item INSTRUCTION MANUAL

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Format PDF SCAN





CONTENTS.
Driving Instructions
Engine Lubrication …
Engine Adjustments and Cleaning
Magneto … …
,, Point Adjustment
,, Timing …
,, Ignition Trouble
Engine Timing
Gear Box …
Gear Box Dismantling
Clutch Adjustment
Transmission …
Adjustment of Chains
Care of Chains
Chain Repair
Chain River Extractor
Spring Fork Adjustment
Rear Wheel Adjustment Gauge
Detachable Wheels …
Removal of Back Wheel
Tyre Repair … …
Removal of Front Wheel
Adjustment of Hub Bearings
General Instructions

INDEX TO ILLUSTRATIONS.
Lubrication
Pusch Rod Extractor
Valve Extractor
Valve Grinding Tool
Vernier Timing adjustment
Arragement of Timing gear
AJS Gear box
Chain repair parts
Chain Rivet extractor
Front fork and Adjustbalbe handlebars
Rear Wheel Adjustment
Back Detachable Wheel
Internal Expanding Brake
Adjustable Saddle




As motor bikes and or vehicles are made in generations, these manuals are suitable for other years of manufacture

YOUR LOCAL DEALERSHIP TECHNICIANS ARE USING THE SAME TYPE OF MANUAL TO SERVICE, MAINTAIN, DIAGNOSE AND REPAIR YOUR BIKE.

System requirements for installation

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