🏷️ Basic Information Identification Make: Triumph Model: Bonneville Year: 2003 Codes Chassis Code: VIN beginning with (likely) SMT... Engine Code Variant: 900cc Parallel-Twin (typically T100 variant for this era) 👋 Introduction Market Position Segment: Classic British Motorcycle, Modern Classic Segment Target Audience: Enthusiasts, owners seeking to maintain or restore their Bonneville. Competitive Analysis Competitors: Other parallel-twin motorcycles of the era, custom builds. Key Features Design Philosophy: Retro styling with modern engineering for reliability and performance. Appeal: Timeless aesthetics, accessible performance, rich brand heritage. 📋 Manual Details Coverage Areas Engine Rebuild: Complete Electrical System: Comprehensive Wiring Diagrams and Troubleshooting Chassis And Suspension: Full Repair and Adjustment Procedures Bodywork And Cosmetics: Repair, Refurbishment, and Restoration Guidance Page Count Estimated Pages: 400+ Manual Type Type: Full Service & Repair Manual Language Language: English Format Format: Digital (likely PDF) 📖 Manual Coverage Systems Covered Engine: Top End, Bottom End, Cooling, Lubrication, Fuel Injection/Carburetion Transmission: Clutch, Gearbox, Final Drive (Chain) Brakes: Front and Rear Calipers, Master Cylinders, Lines, Pads, Rotors Electrical: Ignition, Lighting, Charging System, Instrumentation, ECU Diagnostics Chassis: Frame, Forks, Swingarm, Steering Head Bearings Wheels And Tires: Spokes, Rims, Bearings, Tire Pressures, Mounting Procedures Included Routine Maintenance: Oil Changes, Filter Replacements, Chain Adjustment, Spark Plug Replacement Troubleshooting: Diagnostic Flowcharts, Fault Code Interpretation, Symptom Analysis Major Repairs: Engine Overhaul, Transmission Rebuild, Suspension Overhaul Adjustments: Carburetor/Throttle Body Sync, Valve Clearances, Clutch Lever Free Play Wiring Diagrams: Full Color, Component Identification, Circuit Tracing Technical Depth Depth: Comprehensive: From basic owner checks to full engine and transmission rebuilds. Diagnostic Capabilities: Advanced, including ECU error code reading and interpretation (where applicable). Rebuild Instructions: Detailed step-by-step instructions with torque specifications for all critical fasteners. 📊 Manual Specifications File Format File Type: PDF Searchability: Text-searchable for quick information retrieval. Print Quality: High-resolution, suitable for printing individual pages or sections. Binding Type Binding: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, DOHC, parallel-twin Displacement: 790 cc (later models often 865cc, but 2003 typically 790cc) Bore X Stroke: 79 mm x 79 mm (for 790cc) Compression Ratio: 9.2:1 (typical for 790cc) Performance Horsepower: Approx. 61 hp @ 7400 rpm (for 790cc) Torque: Approx. 60 lb-ft @ 3500 rpm (for 790cc) Fuel System Fuel Delivery: Carbureted (Keihin CVK 36mm) or early Fuel Injection depending on specific market/variant Fuel Type: Unleaded gasoline, 91-98 RON (Octane rating) Lubrication Oil Type: SAE 10W-40 Synthetic or Semi-Synthetic Motorcycle Oil (API SG or higher, JASO MA certified) Oil Capacity: 3.4 Liters (3.6 US Quarts) with filter change 🔧 Transmission Standard Type: 5-speed constant mesh Gear Ratios: Specific ratios detailed in manual (e.g., 1st: 2.43, 2nd: 1.71, 3rd: 1.32, 4th: 1.09, 5th: 0.92) Features Clutch Type: Wet, multi-plate, cable-actuated Final Drive: Chain drive, 525 pitch (typically 104 links) Transmission Oil Type: SAE 80W-90 Gear Oil (API GL-4 or GL-5) Transmission Oil Capacity: N/A (Lubricated by engine oil) 📐 Dimensions Exterior Length: Approx. 2230 mm (87.8 in) Width: Approx. 750 mm (29.5 in) at handlebars Height: Approx. 1100 mm (43.3 in) at seat Wheelbase: Approx. 1500 mm (59.1 in) Weights Dry Weight: Approx. 205 kg (452 lbs) Wet Weight: Approx. 220 kg (485 lbs) with fluids Gross Vehicle Weight Rating: Approx. 400 kg (880 lbs) 🛡️ Safety Features Ratings Safety Certifications: Meets relevant motorcycle safety standards of the era. Active Features Braking System: Hydraulic disc brakes front and rear. Front Brake Spec: 310mm disc, 2-piston caliper Rear Brake Spec: 282mm disc, 2-piston caliper ABS: Optional on some variants, not standard on all 2003 models. Passive Features Lighting: Halogen headlight, LED taillight, turn signals. Instrumentation: Analog speedometer, tachometer, fuel gauge, warning lights. 💡 Technology Features Infotainment Infotainment System: N/A (basic analog instrumentation) 🔧 Maintenance Service Intervals Oil Change Interval: Every 6,000 miles or 12 months, whichever comes first. Filter Change Interval: With every oil change. Valve Clearance Check: Every 12,000 miles or 24 months. Chain Adjustment Interval: Every 3,000 miles or as needed based on slack. Fluid Specifications Engine Oil Spec: SAE 10W-40 Synthetic/Semi-Synthetic Motorcycle Oil (API SG+, JASO MA) Brake Fluid Spec: DOT 4 (for hydraulic clutch and brake systems) Coolant Spec: N/A (Air-cooled engine) Known Issues Common Wear Items: Clutch friction plates, steering head bearings, brake pads, chain and sprockets. Potential Electrical Quirks: Occasional issues with regulator/rectifier or stator on early models (covered in manual troubleshooting). Carburetor Tuning: Can require periodic synchronization and adjustment for optimal running. Recommended Parts Oil Filter Part Number: e.g., Triumph OE filter 1260003-T0301, or equivalent aftermarket (e.g., Hiflofiltro HF198) Air Filter Part Number: e.g., Triumph OE filter T2204250, or equivalent aftermarket Spark Plug Type: e.g., NGK CR9EB or equivalent 📚 Vehicle History Brand Heritage Heritage: Triumph Motorcycles Ltd. is one of the world's longest-established motorcycle manufacturers, known for iconic models. Model Evolution Ancestry: The modern Bonneville line is a revival and evolution of the legendary...