This manual covers the Bruin 250, an all-terrain vehicle (ATV) manufactured between 2004 and 2007. Known for its reliability, ease of use, and affordability, the Bruin 250 is designed for recreational riders and light utility tasks. This model, including sub-models YFM250BT and YFM25BV (2WD), features a 249cc air-cooled, four-stroke engine with SOHC, a CV transmission, and hydraulic disc brakes, making it a capable and dependable choice for various terrains. The reputation for producing robust and high-performance powersports vehicles is reflected in the Bruin 250's solid engineering. This comprehensive factory service manual provides essential information for maintaining and repairing your Bruin 250. It covers all major systems, including the engine, fuel system, cooling system, drive train, chassis, steering, suspension, brakes, and electrical system. Detailed procedures for scheduled maintenance, component removal and installation, system overhauls, and troubleshooting are included, supported by high-quality illustrations and diagrams. This manual is an indispensable resource for owners and technicians seeking to ensure the optimal performance and longevity of their ATV. 🏷️ Basic Information Identification Make: Yamaha Model: Bruin 250 Vehicle Type: ATV (All-Terrain Vehicle) Sub Models Covered: YFM250BT, YFM25BV (2WD) Codes Model Code Prefix: YFM250 👋 Introduction Market Position Vehicle Segment: Entry-level to Mid-range Utility ATV Target Audience: Recreational riders, light utility users Competitive Analysis Key Competitors: Honda Rancher, Suzuki Eiger, Polaris Sportsman 300/330 Key Features Manual Value Proposition: Instant access to factory-level repair and maintenance information for DIY enthusiasts and professional technicians. Vehicle Strengths: Reliability, ease of use, affordability. 📋 Manual Details Coverage Areas Manufacturer Coverage: Full Vehicle Section Coverage: All Chapters Apply to Whole Vehicle Page Count Estimated Page Count: Varies (typical factory service manual for this era is 300-500 pages) Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Delivery Format: Downloadable Digital File Viewing Requirements: No Special Software Required (PDF Compatible) 📖 Manual Coverage Systems Covered Powertrain: Engine, Fuel System, Cooling System, Drive Train Chassis And Body: Chassis and Body, Steering and Suspension Brakes: Brakes Electrical: Electrical System, Wiring Diagrams Procedures Included Maintenance: Scheduled Maintenance, Fluid Checks and Changes, Filter Replacements Repair: Component Removal and Installation, Reassembly Procedures, System Overhauls Troubleshooting: Diagnostic Procedures, Fault Identification, Correction of Issues Technical Depth Depth: Comprehensive (From basic adjustments to major overhauls) Illustration Quality: High (Includes diagrams, exploded parts views, pictures) 📊 Manual Specifications File Format Format: PDF Searchability: Likely Searchable Text (Common for factory digital manuals) Print Quality Printability: Printable Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, SOHC, Air-Cooled Displacement: 249cc (249 cm3) Bore X Stroke: 74.0 x 58.0 mm Compression Ratio: 10.0:1 Performance Horsepower: Approximately 15-17 HP (Estimate based on class) Torque: N/A (Specific figures not readily available without manual) Fuel System Fuel Delivery: Carburetor (Mikuni BS32) Fuel Type: Unleaded Gasoline Cooling System Cooling Method: Air-Cooled Ignition Ignition System: CDI (Capacitor Discharge Ignition) Starting System Starter: Electric Start Lubrication Oil Type: Yamalube 4 (or equivalent SAE 10W-40 API SG or higher) 🔧 Transmission Standard Type: Automatic (V-belt type Continuously Variable Transmission - CVT) Drive System: Shaft Drive Features Gear Selection: Forward (Hi/Lo), Neutral, Reverse Fluid Specifications Transmission Fluid Type: Yamalube Gear Oil (or equivalent SAE 80 API GL-4) 📐 Dimensions Exterior Length: Approx. 73.4 in (1865 mm) Width: Approx. 41.9 in (1065 mm) Height: Approx. 43.9 in (1115 mm) Weights Dry Weight: Approx. 503 lbs (228 kg) Fuel Capacity: 3.2 gal (12 L) Oil Capacity: 2.1 L / 2.2 US qt (Engine Oil) 🛡️ Safety Features Ratings Atv Safety Standards: Manufactured to meet ANSI standards. Active Features Braking System: Hydraulic Disc Brakes (Front and Rear) Passive Features Lighting: Dual Halogen Headlights, Taillight/Brake Light 💡 Technology Features Infotainment Display Features: Digital Odometer, Hour Meter, Fuel Gauge, Neutral Indicator Light Driver Assistance No Specific Features: This model predates advanced driver-assistance systems commonly found in modern vehicles. Connectivity No Connectivity Features: No integrated Bluetooth, GPS, or smartphone connectivity. 🔧 Maintenance Service Intervals Engine Oil Change: Every 1000 km or 6 months (whichever comes first) Spark Plug Check: Every 1000 km Air Filter Cleaning: Every 500 km or as needed in dusty conditions Fluid Specifications Engine Oil Viscosity: SAE 10W-40 Engine Oil API Service: API SG or higher Brake Fluid Type: DOT 3 Known Issues Common Wear Items: Brake pads, tires, drive belts (CVT). Potential Performance Issues: Carburetor cleaning and adjustment may be required over time due to fuel deposits. Electrical Gremlins: Corrosion in connectors or failing grounds can sometimes cause intermittent electrical issues. 📚 Vehicle History Brand Heritage Manufacturer Reputation: Yamaha is renowned for its long history of producing reliable and high-performance motorcycles, ATVs, and marine products. Model Evolution Bruin Lineage: The Bruin line replaced the Grizzly 350 2WD models and offered a more accessible entry point into Yamaha's ATV lineup, focusing on utility and comfort. Production Production Years:...