The DS 450 EFI is a high-performance sport ATV designed for exhilarating off-road adventures and competitive trail riding. Introduced as the first generation of the 450cc sport ATV lineup, it features a potent 449.6 cc liquid-cooled, 4-stroke engine with electronic fuel injection, delivering impressive power and throttle response. Its engineering emphasizes a lightweight, performance-oriented chassis complemented by adjustable suspension, providing agile handling across varied terrains. It was engineered to compete directly with established sport ATVs, offering a blend of premium components and a focus on rider engagement. This comprehensive workshop service manual for the DS 450 EFI covers model years 2007 through 2009. It provides detailed information essential for the maintenance, diagnosis, and repair of all major vehicle systems, including the engine, drivetrain, chassis, braking, and electrical components. The manual details scheduled maintenance procedures, component disassembly and reassembly, troubleshooting common issues, and diagnostic steps, making it an invaluable resource for owners and professional technicians alike. Its scope ensures that users can effectively maintain the performance and reliability of their DS 450 EFI. 🏷️ Basic Information Identification Make: Can-Am Model: DS 450 EFI Model Variant: EFI Body Style: Sport ATV Generation Generation Identifier: First Generation Codes Chassis Code: Not specified in product data, typically varies by specific sub-model/package 👋 Introduction Market Position Vehicle Market Segment: High-performance sport ATV, designed for recreational off-roading, trail riding, and possibly entry-level racing. Competitive Analysis Primary Competitors: Yamaha YFZ450, Suzuki LT-R450, Honda TRX450R Key Features Engine Technology: Fuel injected 450cc liquid-cooled engine, emphasizing power delivery and throttle response. Chassis Design: Lightweight, performance-oriented chassis with adjustable suspension for optimal handling on varied terrain. Manual Utility: Provides critical information for maintenance, repair, and diagnostics, enabling owners to keep their DS 450 EFI in peak condition. 📋 Manual Details Coverage Areas Years Covered: 2007, 2008, 2009 Specific Models Covered: Can-Am DS 450 EFI Page Count Estimated Page Count: Extensive, typical for workshop manuals covering multiple model years and systems (exact count not provided in product info) Manual Type Manual Type: Workshop Service Manual / Repair Manual Language Language: English (presumed, based on typical professional technician documentation) Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Systems: Engine assembly, disassembly, lubrication, cooling, fuel injection, ignition, exhaust, starting system Drivetrain Systems: Transmission, clutch, drive chain, final drive, axles Chassis Systems: Frame, suspension (front and rear), steering, wheels, tires Braking Systems: Hydraulic brake systems (front and rear calipers, master cylinders, lines), parking brake Electrical Systems: Wiring diagrams, battery, charging system (alternator/stator), lighting, ignition switch, starting circuit, instrumentation, EFI control unit Bodywork And Plastics: Body panel removal/installation, fenders, seat, handlebars, controls Procedures Included Maintenance Procedures: Scheduled maintenance, oil changes, filter replacements, chain adjustment, brake fluid flush, spark plug replacement Diagnostic Procedures: Troubleshooting common problems, fault code diagnosis (if applicable to EFI system), performance checks Repair Procedures: Component disassembly and reassembly, seal replacement, bearing replacement, carburetor/throttle body service, electrical component testing and replacement Calibration And Adjustment: EFI system calibration (if user-adjustable), throttle cable adjustment, suspension adjustments Technical Depth Depth Of Coverage: Comprehensive, suitable for professional technicians and experienced DIY mechanics. Covers detailed disassembly, repair, and reassembly of all major vehicle components. Diagnostic Tools Required: Likely includes information on necessary diagnostic tools, potentially including a CAN-bus diagnostic tool for EFI systems and specialized engine tools. 📊 Manual Specifications File Format File Format: PDF Print Quality Image Resolution: Typically high resolution for clear diagrams and text. Specifics not provided in product data. Binding Type Binding Type: Not Applicable (Digital PDF Download) Paper Type Paper Type: Not Applicable (Digital PDF Download) Searchability Text Searchability: Typically searchable PDF for quick access to information. Assumed from standard professional manual practices. ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, Single-cylinder, DOHC, 4 valves Displacement: 449.6 cc (approx.) Bore X Stroke: 95 mm x 63.4 mm (typical for this engine family) Cooling System: Liquid-cooled Performance Horsepower Est: 40-50 HP (estimated, varies by specific model year tuning and conditions) Torque Est: 30-35 lb-ft (estimated) Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) Throttle Body Size: Typically around 46mm Fuel Type Required: Unleaded gasoline, minimum 87 octane (refer to manual for specific recommendation) Ignition System Ignition Type: CDI (Capacitor Discharge Ignition) Lubrication System Oil Type Recommendation: SAE 10W-40 motorcycle specific oil, JASO MA certified (refer to manual for exact spec and capacity) Engine Codes Engine Identification Number Location: Typically stamped on the engine crankcase. 🔧 Transmission Standard Transmission Type: 5-speed manual with reverse Optional Optional Transmissions: None specified Features Clutch Type: Wet, multi-plate Final Drive: O-ring sealed chain, 520 pitch Lubrication Transmission Fluid Type: Typically the same as engine oil (SAE 10W-40 motorcycle oil, JASO MA certified) due to shared sump. Refer to manual for confirmation. 📐 Dimensions Exterior Overall Length: Approx. 1830 mm (72 inches) Overall Width: Approx. 1170 mm (46 inches) Overall Height: Approx. 1010 mm (40 inches) Interior Seating...