🏷️ Basic Information Identification Make: Triumph Model: T120 Bonneville, TR6 Trophy, 6T Thunderbird Engine Displacement: 650cc Covered Years: 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970 Country Of Origin: United Kingdom 👋 Introduction Market Position Target Audience: Triumph T120 TR and 6T 650cc owners, DIY enthusiasts, professional mechanics, restoration specialists. Historical Significance: Covers iconic British motorcycles known for their parallel-twin engines and classic styling, popular in the 1960s and early 1970s. Competitive Analysis Value Proposition: Provides comprehensive technical information, enabling cost savings on maintenance and repairs for owners of these vintage machines. Key Features Instruction Style: Clear, step-by-step instructions with illustrations. Data Source: Original manufacturer's manual, used by professional technicians. 📋 Manual Details Coverage Areas Manual Type: Workshop Repair Service Manual Page Count: 238 Language: English Format: Digital Download (PDF, ZIP, RAR, EXE) Delivery Method: Instant Download 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, disassembly, inspection, assembly of engine components, including pistons, rings, connecting rods, crankshaft, camshaft, valves, valve guides, valve seats, timing gears, and oil pump. Fuel System: Carburetor servicing (e.g., Amal Monobloc, concentric), fuel tank, fuel lines, fuel filters, fuel petcocks. Lubrication System: Oil pump operation, oil pressure, oil filter (if applicable), oil change procedures, oil capacity. Transmission: Gearbox overhaul, clutch operation, gear selection mechanism, primary drive, lubrication. Frame And Attachment Details: Frame inspection, welding, alignment, suspension mounting points, seat mounting, mudguards, chain guard. Wheels Brakes And Tyres: Wheel bearing maintenance, spoke tension, brake shoe adjustment and replacement, brake drum inspection, tire pressure and wear, rim maintenance. Telescopic Fork: Front fork service, damper rod operation, fork oil replacement, gaiter maintenance, steering head bearings. Electrical System: Ignition system (magneto, coil, points, condenser), charging system (dynamo, rectifier), lighting circuits (headlight, taillight, brake light, indicators), wiring diagrams, battery maintenance, switchgear. Bodywork: Tank mounting, side panel fasteners, seat removal and installation, exhaust system, handlebars, controls. Procedures Included Routine Maintenance: Oil changes, lubrication points, chain adjustment, spark plug replacement, brake adjustments, tire checks, air filter cleaning/replacement. Troubleshooting: Diagnosis of common running problems, ignition issues, fuel delivery problems, electrical faults, clutch and gearbox issues. Engine Rebuild: Detailed step-by-step instructions for complete engine disassembly, component inspection, repair, and reassembly. Transmission Overhaul: Clutch plate replacement, gearbox gear inspection and replacement, bearing services. Electrical Repairs: Wiring troubleshooting, component testing (coil, dynamo, regulator), lighting system repair. Chassis And Suspension Repair: Fork servicing, steering head bearing adjustment, wheel spoke truing, brake relining. Technical Depth Depth: Comprehensive. Covers from basic maintenance to full engine and transmission rebuilds, including detailed diagnostic procedures. Illustrations: Yes, described as illustrated with clear step-by-step instructions. Likely includes diagrams and exploded views. Diagnostic Charts: Implied through troubleshooting support for immediate problem fixing. 📊 Manual Specifications File Format Primary Format: PDF Secondary Formats: ZIP, RAR, EXE (may require unzipping software like WinZip or WinRAR) Searchability: Likely searchable if a well-OCR'd PDF, but not explicitly guaranteed. Print Quality Print Permission: Yes, can be printed on any computer. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) File Size Size Guideline: Up to 5 GB (can be large, requires ample storage) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, 4-stroke, parallel-twin cylinder Bore X Stroke: 71 mm x 82 mm (Typical for 650cc models) Compression Ratio: Typically around 7.5:1 to 8.5:1, depending on specific model variant and tune. Performance Horsepower: Approximately 46-54 bhp @ 6,500 rpm (varies by model and year) Torque: Approximately 42-46 lb-ft @ 4,000 rpm (varies by model and year) Fuel System Carburetor Type: Typically Amal Monobloc or Amal concentric carburetors (single or twin setup) Fuel Grade: Leaded premium gasoline (e.g., 96 octane), though modern unleaded can be used with appropriate fuel additives. 🔧 Transmission Standard Type: 4-speed constant mesh Clutch: Multi-plate, wet clutch Primary Drive: Duplex chain Final Drive: Chain drive Features Gearbox Oil Type: EP 90 Gear Oil (specified in manual) 📐 Dimensions Exterior Wheelbase: Approx. 56 inches (1422 mm) Seat Height: Approx. 31 inches (787 mm) Weights Dry Weight: Approx. 390-410 lbs (177-186 kg), depending on model and equipment 🛡️ Safety Features Ratings Crash Test Data: N/A (Vintage motorcycle, no modern crash testing applicable) Active Features Braking System: Drum brakes (front and rear) - typically 7-inch or 8-inch diameter. Lighting: Headlight, taillight, brake light, possibly optional turn signals. Passive Features Frame Construction: Steel duplex frame for rigidity. 💡 Technology Features Infotainment Features: N/A (Classic motorcycle, no modern electronic infotainment systems.) Driver Assistance Features: N/A (Classic motorcycle, no driver assistance features.) Connectivity Features: N/A (Classic motorcycle, no connectivity features.) 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000 miles (4,800 km) or annually, whichever comes first. Valve Clearance Check: Recommended every 3,000-6,000 miles (4,800-9,600 km), depending on usage and engine condition. Chain Adjustment: Check and adjust chain slack every 500-1,000 miles (800-1,600 km). Fluid Specifications Engine Oil Type: SAE 20W/50 (often straight-weight or multi-grade specified for classic bikes,...