SPECIFICATION.
ENGINE - Of "A. J. S." design and manufacture, Single-cylinder vertical. Bore 70 m.m. Stroke m.m. Capacity 346 c.c. Detachable. cylinder head with down-draught inlet port and single-exhaust port. Accessible camshaft drive gear for dismantling, specially designed aluminium alloy piston with fully floating gudgeon pin and three narrow rings. Connecting rod, O.H.C. Rockers, etc., machined from special steel. Roller bearing big end and ball bearings to both driving-side and timing-side mainshafts. The Camshaft is driven by roller chain with patented tensioning device and reaction damper - interior surfaces of the engine are specially finished and highly polished. Piston bodies of various compression ratios for use with straight petrol, petrol benzol and alcohol are available. The compression ratio of the standard Competition engine is 6 to l, and Racing engine 7.5 to 1. A spare piston having a ratio of 11 to 1 is available. Vernier setting device for ignition timing.
GEAR BOX - Four speed. Foot operated gear change with positive stop. Foot lever conveniently situated on offside of machine. Competition Ratios : Top 5.37, third 6.49, second 9.50, bottom 15.95. Racing - close ratios : top 5.7, third 6.49, second 7.84, bottom 13.8.
CLUTCH - Multi-plate clutch with both push rod and cable adjustment. Extremely light clutch lever tension.
WHEELS - Both front and rear wheels fitted with taper roller bearings rear wheel specially reinforced with 14 gauge rim and (6.9 gauge butted spokes. The rear wheel is of the quickly detachable type.
TYRES - 20 in. x 3.25 in. Cord Tyres on Competition Model. 27 in. x 3 in. Cord Tyres on Racing Model.
MUDGUARDS - On the Competition Model unvalanced mudguards are fitted and on the Racing Models narrow type mudguards are fitted.
BRAKES - Front and rear internal expanding, both finger adjusted. Rear brake, 72 in - diameter, operated by foot pedal on left side of machine. Front brake 7 in. diameter, with iron alloy drum ribbed outside.
HANDLEBARS - Latest type with adjustable bolt-on controls. design with centre barrel spring and fitted with hand adjusted shock absorber, which allows smooth and long fork movement. With hand adjusted multi-plate steering damper.
STANDS - Centre spring-up stand which requires the minimum amount of effort to operate. Sturdy front stand bolted into position on front mudguard.
SADDLE - Soft top with 3 point suspension, hinged at the front and adjustable forward and backward.
PRICE to Standard Specification :
RACING MODEL £ 70-0-0
COMPETITION MODEL £ 65-0-0
From the 1934 AJS Catalogue
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