SPECIFICATION.
ENGINE - Of "A.J.S." design and manufacture. Inclined single-cylinder with overhead valves. Bore 84 m.m. Stroke m.m. Capacity 498 c.c. Adjustable mechanical lubrication by gear driven pump made integral with magneto chain cover. Compression ratio 5.7 to I. Two-port detachable cylinder head. Duplex valve springs. Duralumin rocker arms, tappet tubes and small end bush. Aluminium alloy piston with fully floating gudgeon pin and four rings. Roller bearing big end ; single row ball bearing to timing side mainshaft and double row ball bearing to driving-side mainshaft Totally enclosed rocker gear, tappet tubes and exhaust valve lifter mechanism. Inspection disc on magneto chain cover for inspecting chain tension. Vernier setting device for ignition timing.
GEAR BOX - Four speed gear made to " A.J.S." design, with totally enclosed foot starter mechanism and speedometer drive. Ratios : Top 4.81, 5.8, 10.4, and 14.4 to 1 bottom. Hand or foot control optional.
CLUTCH - Multi-plate clutch push rod and cable adjuster provided.
FRAME - Semi-cradle with duplex chain stays and torque tubes, sidecar lugs made integral.
FRONT FORKS - Centre barrel spring type, large smooth action adjustable spindles and hand adjustable shock absorber. With hand adjusted multi-plate steering damper.
HANDLEBARS - Adjustable " Clean " type with integral controls, including twist grip and steering damper control knob.
EXHAUST SYSTEM - As illustrated or with upswept exhaust pipes and round type silencers.
WHEELS - Rear Wheel "A.J.S." patent, quickly detachable, with locking device on sleeve bolts. Adjustable taper roller bearings to both wheel hubs.
TYRES - 26 in. in. Studded Cord.
MUDGUARDS - Rear hinged for quick wheel removal. Front fully valanced.
CARBURETTOR - " Amal " needle-type with throttle stop and pilot jet.
FOOTRESTS - Footrest arms adjustable to wide range position, rubber covered and of sturdy design.
BRAKES - Both 7 in. diameter, brake drum of iron alloy, front with cooling fins. Both fitted with dust and water excluders and finger adjustment.
TRANSMISSION - " Renold " Chain, primary ½ in. x .305 in., running in oil bath. Efficient shock absorber fitted to engine shaft, also running in oil. Rear chain " Renold " in. x in. fitted with efficient top half chain cover.
SADDLE - " Lycett " soft top with three-point suspension, adjustable backwards and forwards
STANDS - Central spring-up. Front tubular steel bolted to front mudguards.
PETROL TANK - Chromium plated and black finish with provision for fitting of flush instrument panel. Capacity 2½ gallons. Quick-action filler cap.
OIL TANK - Capacity 4½ pints. Quick-action filler cap.
REAR CARRIER - Detachable, made of welded steel tubing.
PRICE - To Standard Specification £ 55-0-0.
From the 1934 AJS Catalogue
If you have a query or information about AJS motorcycles please contact us
