Model:
16M, 16MS, 16MC, 16MCS, 18, 18S, 18C, 18CS
Model Codes:
16M, 16MS, 16MC, 16MCS, 18, 18S, 18C, 18CS
Historical Context:
AJS motorcycles of this era were known for their robust British engineering, suitable for both everyday transport and sport riding. This manual caters to owners of these classic British singles.
Rival Models:
Competed with models from BSA (e.g., C10, C11, B31, B33), Triumph (e.g., T100, Tiger 80), Norton (e.g., ES2), and Royal Enfield.
Manual Value Proposition:
Essential for maintaining the reliability and originality of a 1953 AJS motorcycle, enabling owners to perform servicing and repairs effectively.
Systems Covered:
Engine, Gearbox, Clutch, Electrical System, Ignition, Carburetion, Fuel System, Lubrication, Frame, Forks, Suspension, Brakes, Wheels, Tyres, Bodywork, Accessories, Troubleshooting
Page Count:
Approximately 150-200 pages (estimated based on typical manuals of the era and model complexity)
Manual Type:
Service and Maintenance Manual
Format:
Print Reproduction (digital PDF likely available)
Engine Systems:
Detailed breakdown of single-cylinder engines, including disassembly, assembly, tolerances, valve timing, decarbonizing, piston ring installation, cylinder boring, crankshaft and connecting rod inspection and repair.
Transmission And Clutch:
Maintenance and repair of the Burman gearbox, including gear selection, lubrication, clutch operation, plate replacement, and linkage adjustment.
Electrical Systems:
Ignition system (Lucas magneto/coil), lighting circuits, charging system (if dynamo fitted), wiring diagrams, bulb types, and battery maintenance.
Fuel And Carburetion:
Adjustment and overhaul of common carburetors of the era (e.g., Amal), fuel tank maintenance, petcock operation, and fuel line routing.
Chassis And Suspension:
Front fork maintenance (leading link or telescopic), rear suspension (if applicable), frame alignment checks, wheel bearing service, and steering head bearing adjustment.
Braking Systems:
Drum brake adjustment, lining inspection and replacement, and cable maintenance for both front and rear brakes.
Bodywork And Fittings:
Mudguard alignment, seat mounting, handlebar adjustments, and general upkeep of the motorcycle's exterior.
Routine Maintenance:
Oil changes, greasing points, chain adjustment, spark plug replacement, air filter cleaning, brake and clutch adjustment, tyre pressure checks, and general lubrication schedule.
Troubleshooting Guides:
Common starting problems, engine running issues, electrical faults, and braking inefficiencies with suggested causes and remedies.
Engine Overhaul:
Step-by-step instructions for complete engine disassembly, component inspection, machining, and reassembly, including torque specifications for critical fasteners.
Electrical Diagnostics:
Fault finding for ignition and lighting systems, checking magneto output, testing dynamo charging, and understanding wiring diagrams.
Depth Of Coverage:
Comprehensive. Covers everything from basic rider adjustments to full engine and gearbox rebuilds, suitable for both home mechanics and professional workshops.
File Format:
Likely PDF or scanned document if digital. Printed format is a high-quality reproduction of the original.
Print Quality:
High-quality reproduction with clear text and legible diagrams/illustrations.
Binding Type:
Perfect bound or spiral bound for lay-flat usability in a workshop environment.
Paper Type:
Durable, matte finish paper suitable for workshop use, resistant to grease and oil smudges.
Engine Type:
Air-cooled, four-stroke, single-cylinder, pushrod OHV
Displacement 16 Series:
Approximately 350cc (347cc)
Displacement 18 Series:
Approximately 500cc (498cc)
Bore Stroke 16 Series:
e.g., 66.5mm x 65mm (typical for 350cc AJS)
Bore Stroke 18 Series:
e.g., 82.5mm x 93mm (typical for 500cc AJS)
Compression Ratio:
Typically 6.0:1 to 7.0:1 (depending on model variant and tuning)
Horsepower 16 Series:
Approximately 15-18 bhp (brake horsepower)
Horsepower 18 Series:
Approximately 20-24 bhp
Torque Specifications:
Torque figures not commonly published in this format; emphasis on usability and engine characteristics.
Carburetor Types:
Amal (e.g., 375/278, 276) or similar British brands of the era.
Fuel Type:
Leaded gasoline (e.g., 4-star), often mixed with oil for older engines or specific lubrication needs.
Oil Change Interval:
Typically every 1,000 - 2,000 miles or annually (detailed in manual).
Greasing Points:
Regular greasing of pivot points, fork stanchions, and wheel bearings as per the lubrication chart in the manual.
Valve Clearance Check:
Every 2,000 - 3,000 miles, or when engine noise increases (specified in manual).
Engine Oil Type:
Primarily straight-weight oils like SAE 20W or SAE 30 (check manual for specific recommendations for engine type and climate).
Engine Oil Capacity 16 Series:
Approximately 3.5 pints (1.98 litres)
Engine Oil Capacity 18 Series:
Approximately 4.5 pints (2.55 litres)
Fork Oil Type:
Motorcycle fork oil (e.g., SAE 10W or similar viscosity specified in manual).
Common Wear Items:
Cylinder head gasket leaks, worn valve guides, clutch plate wear, gearbox engagement issues, magneto ignition coil failure, worn brake linings.
Troubleshooting Emphasis:
The manual provides detailed guidance on diagnosing and rectifying these common issues.
Manufacturer:
Associated Motor Cycles (AMC) Group, which also owned Matchless.
Aermacchi Connection:
AJS was a prominent British motorcycle manufacturer with a long history dating back to the early 20th century.
16 Series Role:
The '16' series represented AJS's popular 350cc range, known for its versatility and reliability.
18 Series Role:
The '18' series was the larger 500cc counterpart, offering more power and torque for touring and faster riding.
Suffix Meanings:
M=Standard, S=Telescopic Forks (replacing Girder forks on earlier models), C=Competition/Trials spec, CS=Competition with Telescopic Forks.
Production Period:
These models were primarily produced in the late 1940s and through the 1950s.
