Target Audience:
Mechanics and DIY enthusiasts for Matchless motorcycle maintenance and repair
Value Proposition:
Provides comprehensive, detailed, and essential technical information for servicing and repairing the Matchless Heavyweight 600cc models from 1957-1966, enabling owners to maintain their classic motorcycles effectively.
Clarity Of Instruction:
Simple and precise explanations designed for ease of understanding, even for less experienced personnel.
Visual Aids:
Detailed illustrations, exploded diagrams, drawings, and photos to guide users through procedures.
Completeness:
Stated as 100% complete and intact, with no missing or corrupt pages/sections.
Covered Years:
1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966
Type:
Workshop Service Repair Manual
Format:
PDF (Portable Document Format)
Delivery Method:
Instant Download
Payment Methods:
All major credit/debit cards, PayPal
Engine:
Engine overhaul, disassembly, assembly, lubrication, cooling, ignition system, fuel system (carburetor adjustment/rebuild, fuel delivery)
Transmission:
Gearbox disassembly, assembly, maintenance, lubrication, clutch operation and adjustment
Chassis:
Frame inspection and repair, suspension (front fork, rear shocks), steering system
Brakes:
Drum brake system maintenance, adjustment, linings
Electrical:
Lighting system, ignition coil, dynamo/alternator (if applicable to later models), wiring diagrams, battery maintenance
Bodywork And Trim:
Body panel removal and installation, fenders, fuel tank, seat
Maintenance:
Routine servicing, lubrication schedules, fluid level checks, adjustments
Troubleshooting:
Diagnosis of common problems, identification of causes and solutions
Repair:
Step-by-step instructions for component removal, disassembly, cleaning, inspection, repair, reassembly, and installation
Adjustment:
Valve clearance, ignition timing, carburetor settings, clutch and brake adjustments
Specifications:
Tightening torques, wear limits, clearances, fluid capacities, electrical specifications
Depth:
Comprehensive, detailed step-by-step procedures with pictorial diagrams, exploded views, and photos. Covers from basic maintenance to full rebuilds.
Engine Configuration:
Parallel-twin, overhead valve (OHV)
Bore X Stroke Mm:
Typically around 72.0 mm x 73.0 mm (for G9/G11 models, specific values to be confirmed in manual)
Compression Ratio:
Varies by model year and tune, typically around 7.0:1 to 7.5:1
Estimated Horsepower:
Approx. 30-35 HP (specific to model and tune)
Estimated Torque:
Varies, typically strong mid-range torque expected from a 600cc twin
Carburetor Type:
Likely Amal concentric carburetors (e.g., 375/376 series), single or twin depending on model variant
Fuel Type:
Leaded gasoline (historical context), modern unleaded with appropriate octane rating may require additive
Lubrication System:
Wet sump (typical for most parallel twins of this era)
Infotainment System:
N/A (Classic motorcycle, no electronic infotainment systems)
Assistance Systems:
N/A (Classic motorcycle, no electronic driver assistance systems)
Connectivity Features:
N/A (Classic motorcycle, no electronic connectivity features)
Oil Change:
Typically every 1,000 - 2,000 miles or annually, specific details in manual
Valve Clearance Check:
Recommended at first service and then periodically, e.g., every 3,000-5,000 miles
Engine Oil:
SAE 20W-50 or SAE 30 API SE/SF rated oil (typical for the era, consult manual for exact specification)
Gearbox Oil:
EP 80W gear oil (specific grade may vary, manual will detail)
Primary Chaincase Oil:
Typically SAE 20W-50 or SAE 30 motorcycle oil
Common Wear Points:
Valve guides, camshaft wear, primary chain wear, gearbox output shaft seal leaks, carburetor needle wear leading to rich mixture
Electrical Quirks:
Lucas electrical components can be prone to issues if not maintained; wiring insulation degradation over time
Importance Of Tools:
Manual stresses the use of correct special service tools and calibrated instruments for accurate adjustments and measurements.
Genuine Parts:
Emphasis on using genuine Matchless parts for optimal reliability and longevity.
Manufacturer Origin:
United Kingdom (Associated Motorcycles (AMC) Group)
Historical Context:
The Heavyweight 600cc series represents a significant part of Matchless's post-war motorcycle production, known for their robust construction and reliable parallel-twin engines.
Production Period:
1957-1966 coverage for this manual indicates a significant production run for these models.
