🏷️ Basic Information Identification Make: AJS Model: 16/18/20/30 Year: 1956 Product Type: Service Repair Manual 👋 Introduction Market Position Target Audience: Owners and mechanics specializing in classic British motorcycles, particularly AJS models from the mid-1950s. Competitive Analysis Niche: Essential reference for maintaining and restoring iconic post-war AJS motorcycles, filling a critical gap for vintage enthusiasts. Key Features Value Proposition: Provides the essential technical knowledge required for accurate diagnosis, repair, and maintenance, preserving the originality and performance of these classic machines. 📋 Manual Details Coverage Areas Manual Content: Comprehensive service and repair information for AJS 16, 18, 20, and 30 models from 1956. Page Count Estimated Pages: Approximately 150-200 pages (estimated based on typical manuals of the era and scope). Manual Type Type: Service/Workshop Manual Language Language: English Format Format: Printed Reproduction (likely) 📖 Manual Coverage Systems Covered Engine: Engine overhauls, tuning, lubrication, cooling, ignition system, carburetion. Transmission: Gearbox disassembly, assembly, maintenance, and troubleshooting. Clutch: Clutch operation, adjustment, and repair. Suspension: Front fork servicing, rear suspension components, and adjustments. Brakes: Drum brake operation, adjustment, and servicing. Electrical: Ignition system wiring, lighting circuits, charging system (generator/dynamo), battery maintenance. Chassis: Frame inspection, wheel bearing maintenance, steering head adjustment. Fuel System: Fuel tank maintenance, fuel lines, and carburettor servicing (specific to fitted carburetors like Amal). Procedures Included General Maintenance: Regular servicing, lubrication points, cleaning procedures. Troubleshooting: Common problems and diagnostic procedures for various systems. Overhaul: Complete engine disassembly and reassembly instructions. Adjustments: Carburettor, ignition timing, clutch, and brake adjustments. Technical Depth Depth: Comprehensive for qualified mechanics and experienced enthusiasts, covering detailed disassembly, repair, and reassembly of major components. 📊 Manual Specifications File Format File Format: Likely printed on demand or a high-quality reproduction of the original manual. Print Quality Print Quality: High-quality reproduction designed for clarity and durability in a workshop environment. Binding Type Binding: Typically saddle-stitched or perfect bound for ease of use and durability. Paper Type Paper Type: Durable paper stock, often gloss or semi-gloss to withstand workshop conditions. ⚙️ Engine Specifications Primary Engine Engine Type: Single-cylinder, four-stroke (OHV for 16, 18, 20; likely overhead cam for some variants or later models, but manual covers specific OHV configurations for these designations). Bore Stroke 16: 350cc variants (e.g., Model 16) typically around 66mm x 72.8mm. Bore Stroke 18: 500cc variants (e.g., Model 18) typically around 82.55mm x 93mm. Bore Stroke 20: 350cc variants (e.g., Model 20) typically around 66mm x 72.8mm. Bore Stroke 30: 500cc variants (e.g., Model 30) typically around 82.55mm x 93mm. Performance Horsepower 350Cc Approx: Around 18-20 bhp at peak RPM (model dependent). Horsepower 500Cc Approx: Around 24-28 bhp at peak RPM (model dependent). Fuel System Carburetor Type: Typically Amal (e.g., Monobloc or Concentric) or similar British brands of the era, with specific jetting and settings detailed in the manual. Fuel Type: Petrol (gasoline) – historically, leaded fuel was used. Modern equivalents or additives may be required. Lubrication Oil Type Vintage: Castor oil or mineral oil blended with fuel (pre-mix for some gearbox lubrication, separate engine oil system). Oil Type Modern Recommendation: Manual will specify original oil grades; modern enthusiasts often use specific classic motorcycle oils with appropriate additives. 🔧 Transmission Standard Gearbox: Constant mesh, four-speed (or sometimes three-speed depending on specific model variant and year). Optional Transmission Options: Not typically applicable for this era; standard gearboxes were the norm. Features Clutch Type: Wet, multi-plate clutch operated by cable and lever. Gear Selection: Foot-operated gearchange, often with a heel-and-toe lever. 📐 Dimensions Exterior Wheelbase: Varies by model but generally in the range of 54-56 inches (1370-1420 mm). Weights Dry Weight Approx: 350cc models: 340-360 lbs (154-163 kg); 500cc models: 380-400 lbs (172-181 kg). 🛡️ Safety Features Ratings Safety Standards: No formal crash ratings as per modern standards. Safety relies on rider skill and basic mechanical integrity of the era. Active Features Braking System: Drum brakes front and rear. Manual details adjustment procedures for optimal stopping power. Passive Features Frame Construction: Robust steel frame designed for stability and rider support. 💡 Technology Features Infotainment Features: Not applicable. Focus is on mechanical function and rider feedback. Driver Assistance Features: Not applicable. Traditional rider-focused operation. Connectivity Features: Not applicable. Purely mechanical. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 1,000-2,000 miles, or as specified for gearbox/engine oil changes. Major Overhaul Interval: Depends heavily on usage, but engine rebuilds might be considered every 15,000-30,000 miles. Fluid Specifications Engine Oil Capacity: Approximately 3-4 pints (1.4-1.9 litres) for 350/500cc models, check manual for exact figures. Gearbox Oil Type: EP (Extreme Pressure) gear oil, often SAE 90. Manual will specify exact grade. Fork Oil Type: Specific weight motorcycle fork oil. Manual will detail type and quantity. Known Issues Common Wear Items: Valve guides, piston rings, primary chain, clutch plates, and worn gearbox components. Electrical Gremlins: Lucas electrical components can be temperamental; wiring loom integrity and dynamo...