The Ninja 250R (model code EX250J) represents the second generation of this popular lightweight sportbike, produced from 2008 to 2012. Designed with an emphasis on affordable performance, sporty styling, and user-friendliness, it appeals to entry-level sportbike enthusiasts, daily commuters, and novice riders. Its full fairing design enhances aerodynamics and rider protection, while the accessible riding position ensures comfort during everyday use. Powered by a 249 cc liquid-cooled, parallel-twin engine, the Ninja 250R delivers a balanced blend of power and efficiency, supported by a 6-speed transmission and a robust high-tensile steel perimeter frame. This Service Repair Manual provides comprehensive guidance for the maintenance, repair, and troubleshooting of the Ninja 250R (EX250J) models from 2008 to 2012. It covers all essential systems, including detailed procedures for engine mechanicals, fuel and ignition systems, transmission, cooling, brakes, suspension, and electrical components. The manual includes scheduled maintenance guidelines, diagnostic troubleshooting charts, repair procedures, technical specifications, and accurate wiring diagrams. Its thorough coverage is designed to assist owners, mechanics, and technicians in effectively maintaining and repairing the vehicle to factory standards. 🏷️ Basic Information Identification Make: Kawasaki Model: Ninja 250R Model Code: EX250J Generation: 2nd Generation (2008-2012) 👋 Introduction Market Position Target Audience: Entry-level sportbike enthusiasts, commuting riders, and DIY motorcycle mechanics. Segment: Lightweight sportbike / Supersport Competitive Analysis Key Competitors: Honda CBR250R, Yamaha YZF-R25 (where applicable), Suzuki GSX250R. Key Features Of Vehicle Design Philosophy: Affordable performance, sporty styling, and ease of use for new riders. Aerodynamics: Full fairing design for improved aerodynamics and rider protection from wind. Ergonomics: Sport-oriented but generally accessible riding position suitable for everyday use. 📋 Manual Details Coverage Areas Years Covered: 2008, 2009, 2010, 2011, 2012 Model Variants: All Ninja 250R models (EX250J) Page Count Estimated Pages: Approximately 500-600 pages (typical for factory service manuals of this era) Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul, disassembly, assembly, inspection, and adjustment of all engine components. Engine Fuel System: Carburetor inspection, cleaning, adjustment, and overhaul; fuel pump, fuel filter replacement. Engine Ignition System: Spark plug inspection and replacement, ignition coil testing, CDI unit diagnostics. Transmission: Clutch operation, inspection, and adjustment; gearbox disassembly and assembly, gearshift mechanism. Cooling System: Radiator, fan, coolant hoses, thermostat inspection and replacement; coolant bleeding procedures. Exhaust System: Exhaust pipe, muffler inspection and replacement. Frame And Suspension: Front fork disassembly, service, and adjustment; rear shock absorber replacement; frame inspection. Brakes System: Front and rear brake caliper service, brake pad replacement, hydraulic system bleeding, master cylinder overhaul. Wheel And Tires: Tire inspection and replacement, wheel bearing service, rim runout checks. Electrical System: Wiring diagrams, battery testing and maintenance, charging system (alternator, rectifier/regulator), starter motor, lighting system. Controls And Instruments: Throttle grip, clutch lever, brake lever adjustment; speedometer, tachometer, indicator lights. Bodywork And Fairings: Removal and installation of fairings, seat, fuel tank, fenders. Procedures Included Scheduled Maintenance: Detailed procedures for oil changes, filter replacements, chain adjustment, spark plug checks, and other routine service items. Troubleshooting: Diagnostic charts and step-by-step procedures for identifying and resolving common mechanical and electrical issues. Repair Procedures: Comprehensive instructions for disassembling, repairing, and reassembling all major vehicle components. Technical Data And Specifications: Torque values, clearances, fluid capacities, electrical specifications, and measurement data for all components. Wiring Diagrams: Detailed, factory-accurate wiring diagrams for all electrical systems, including lighting, ignition, and charging. Special Tools: Identification and usage instructions for specialized tools required for specific repair or maintenance tasks. Technical Depth Depth: Complete factory-level diagnostic, repair, and overhaul information. Suitable for professional mechanics and experienced DIY enthusiasts. 📊 Manual Specifications File Format Digital Quality: High-resolution scans of original factory documents, ensuring clear text and diagrams. Searchability: Likely text-searchable PDF, allowing quick access to specific information. Print Quality Print Readability: Designed for clarity when printed, with legible diagrams and text. Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-cooled, 4-stroke, DOHC, parallel-twin Displacement: 249 cc (249 cm³) Bore X Stroke: 62.0 x 41.2 mm Compression Ratio: 11.6:1 Valve Train: DOHC, 8 valves (4 per cylinder) Performance Horsepower Peak: Approximately 30.5 HP @ 10,500 rpm (claimed) Torque Peak: Approximately 17.5 lb-ft @ 8,000 rpm (claimed) Fuel System Fuel Delivery: Keihin CVK34 carburetors (dual) Fuel Tank Capacity: 18.0 L (4.8 US gal) Ignition Ignition System: Digital CDI Cooling System Cooling Method: Liquid-cooled 🔧 Transmission Standard Type: 6-speed constant mesh Features Clutch: Wet, multi-disc Final Drive: Sealed chain 📐 Dimensions Exterior Length: 2,000 mm (78.7 in) Width: 750 mm (29.5 in) Height: 1,100 mm (43.3 in) Wheelbase: 1,370 mm (53.9 in) Ground Clearance: 155 mm (6.1 in) Weights Curb Weight: Approximately 170 kg (375 lbs) Seat Height: 780 mm (30.7 in) Front Tire: 110/70-17 M/C 54H Rear Tire: 130/70-17 M/C 62H Front Brake: 290 mm petal disc,...