This manual covers the Big Bear 250 All-Terrain Vehicle (ATV), including models YFM250 and YFM 250XL, primarily for the 2007, 2008, and 2009 model years. It also provides essential information for the earlier Bear Tracker ATV (1999-2004) and Bruin ATV (1999-2006). , a manufacturer renowned for its powersports and marine products, has developed the Big Bear series as a durable and capable line of utility ATVs. These vehicles are engineered for off-road performance and reliability, building on a legacy of robust design. This comprehensive factory service manual is designed to guide both factory service technicians and knowledgeable DIY mechanics through the maintenance and repair of these ATVs. It details scheduled maintenance procedures, engine tune-ups, and a wide array of troubleshooting steps for common issues such as starting problems, engine misfires, stalling, fuel delivery concerns, and overheating. The manual also provides in-depth coverage of engine overhaul, transmission repair, electrical system diagnostics, and chassis and suspension servicing, ensuring that owners and technicians have the necessary information to keep their vehicles operating optimally and safely. 🏷️ Basic Information Identification Make: Yamaha Model: Big Bear 250 Model Variant: YFM250, YFM 250XL Vehicle Type: All-Terrain Vehicle (ATV) Primary Covered Years: 2007, 2008, 2009 Secondary Covered Models: Bear Tracker ATV (1999-2004), Bruin ATV (1999-2006) 👋 Introduction Market Position Target Audience: Factory service technicians and knowledgeable DIY mechanics. Competitive Analysis Manual Equivalence: Equivalent to a retail-purchased repair manual, providing official factory service data. Key Features Instructional Style: Sequential, step-by-step procedures with illustrations, diagrams, and exploded views for clarity. Accessibility: Instant download and permanent saving to personal devices. Data Integrity: Prepared using the latest available data at publication, considered the sole source for sound repair advice. Tool Requirements: Specifies use of exact tools as recommended, with notes on renting special tools. 📋 Manual Details Coverage Areas Primary Coverage: Yamaha Big Bear 250 (2007-2009) Secondary Coverage: Yamaha Bear Tracker ATV (1999-2004), Yamaha Bruin ATV (1999-2006) Page Count Estimated Page Count: Information not explicitly stated, but comprehensive coverage implies a substantial page count (likely 300+ pages for a full factory service manual). Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Full engine overhaul, tune-up, compression testing, diagnostics, disassembly, reassembly, inspection of internal components (pistons, rings, rods), fuel system service. Transmission: Repair, overhaul, adjustment procedures, fluid specifications (likely covered, though not explicitly detailed in the snippet). Electrical: Testing of electrical parts, diagnostics, wiring diagrams (likely included for troubleshooting). Chassis And Suspension: Component inspection, repair, and adjustment procedures. Brakes: Inspection, repair, and adjustment procedures. Fuel System: Checking, testing, carburetor service (no fuel at carb, flooding). Cooling System: Overheating and running too hot diagnostics and procedures. Procedures Included Maintenance: Scheduled maintenance procedures, intervals, fluid checks. Troubleshooting: Comprehensive troubleshooting for various issues including: engine won't start, engine misfires (idle/high speed), engine stalls, fuel delivery problems (no fuel, flooding), backfiring, overheating, engine bogging. Repair And Overhaul: Part removal, disassembly, reassembly, unit repair, engine rebuild to factory specifications. Inspection: Detailed inspection of engine components (pistons, rings, rods), general parts inspection. Technical Depth Depth: Comprehensive, covering basic maintenance to complete engine overhaul and advanced diagnostics, suitable for both DIY and professional technicians. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable due to PDF format, enhancing ease of use for finding specific information. Print Quality Quality: High quality, designed for clarity with illustrations, diagrams, and exploded views. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Likely a 250cc, single-cylinder, 4-stroke engine (common for this class of ATV, though specific type not detailed in snippet). Performance Engine Compression: Procedure for performing engine compression tests is covered. Fuel System Fuel Delivery: Carbureted (implied by troubleshooting 'no fuel at carburetor or flooding at carb'). Technical Specifications Torque Specifications: Included within the manual for various components and assemblies. Engine Rebuild Rebuild Standard: Engine rebuild procedures to factory specifications are detailed. 🔧 Transmission Transmission Type Type: Likely an automatic transmission with high/low range, common for this class of utility ATV (specifics not detailed in snippet). Features Clutch System: Procedures for clutch system service and adjustment are likely included. 📐 Dimensions Exterior Dimensions Length: Not specified in product information. Factory service manual would contain this data. Weights Dry Weight: Not specified in product information. Factory service manual would contain this data. 🛡️ Safety Features Ratings Safety Features: Manual provides guidance on proper repair and maintenance to ensure safe operation. Active Features Braking System: Procedures for inspection, maintenance, and repair of the braking system. Passive Features Operator Safety: Emphasis on following procedures to ensure correct and safe mechanical function. 💡 Technology Features Infotainment Infotainment System: N/A (ATVs typically do not feature infotainment systems). Driver Assistance Driver Assistance Features: N/A (ATVs typically do not feature electronic driver assistance...