The Ninja 250R (EX250-J) is an entry-level sportbike renowned for its nimble handling, fuel efficiency, and approachable power delivery, making it an ideal choice for new riders, commuters, and track day enthusiasts. Covering model years 2008 through 2012, this motorcycle builds upon a legacy of producing reliable and performance-oriented machines. Its sporty styling and lightweight design contribute to an engaging riding experience, positioning it as a competitive option in the lightweight sportbike segment. This comprehensive workshop service and repair manual provides detailed guidance for maintaining and repairing your Ninja 250R. It covers all essential systems, including engine mechanicals, fuel, ignition, cooling, transmission, chassis, suspension, brakes, wheels, tires, and the electrical system. With step-by-step instructions for routine maintenance, troubleshooting common issues, component repair, and technical specifications, this manual is an invaluable resource for owners and technicians alike, ensuring the longevity and optimal performance of your motorcycle. 🏷️ Basic Information Identification Make: Kawasaki Model: Ninja 250R Model Code: EX250-J Model Years Covered: 2008, 2009, 2010, 2011, 2012 👋 Introduction Market Position Category: Entry-level Sportbike / Lightweight Motorcycle Competitive Analysis Competitors: Honda CBR250R, Yamaha YZF-R25, Suzuki GSX250R. Key Features Target Audience: New riders, commuters, track day enthusiasts looking for an affordable and manageable sportbike. Vehicle Characteristics: Nimble handling, fuel efficiency, approachable power delivery, sporty styling. 📋 Manual Details Coverage Areas Primary Coverage: Workshop Service and Repair Page Count Total Pages: 427 Manual Type Type: Service Manual / Repair Manual Language Language: English Format File Format: PDF Download Method: Instant Download 📖 Manual Coverage Systems Covered Engine Mechanical: Complete disassembly, assembly, inspection, and repair of the engine (including cylinder head, pistons, crankshaft, camshafts, valves, oil pump). Fuel System: Carburetor tuning and overhaul, fuel tank, fuel pump, fuel lines, fuel filter. Ignition System: Ignition timing, spark plugs, CDI unit, ignition coils. Cooling System: Radiator, cooling fan, thermostat, coolant flow. Exhaust System: Muffler, exhaust pipes, catalytic converter (if applicable). Transmission: Clutch operation, gearbox disassembly and assembly, gear ratios, lubrication. Chassis Frame: Frame inspection, steering head bearings, alignment. Suspension: Front fork service and repair (including oil change and seal replacement), rear shock absorber inspection and adjustment. Brakes: Front and rear brake systems, hydraulic fluid replacement, brake pad inspection and replacement, caliper overhaul, master cylinder service. Wheels Tires: Wheel bearing inspection and replacement, tire pressure, tire wear. Electrical System: Wiring diagrams, battery service, charging system (alternator/stator), starter motor, lighting (headlight, taillight, indicators), horn. Bodywork Fittings: Fairing removal and installation, seat, fuel tank, fenders, mirrors. Procedures Included Maintenance: Routine maintenance tasks, oil changes, filter replacements, lubrication points, periodic checks. Troubleshooting: Diagnostic procedures for common issues, symptom-based troubleshooting guides. Repair: Step-by-step instructions for component removal, disassembly, repair, reassembly, and installation. Adjustments: Carburetor synchronization, idle speed adjustment, clutch and brake lever free play adjustment, chain tension adjustment. Technical Specifications: Torque values for all fasteners, engine specifications, electrical specifications, fluid capacities, wear limits. Special Tools: Identification and usage instructions for specialized tools required for specific repair procedures. Technical Depth Depth: Comprehensive; covers basic maintenance to complete engine and gearbox rebuilds, including detailed electrical diagnostics. 📊 Manual Specifications File Format Quality: High-resolution, printable pages. Searchable: Yes (standard PDF search capabilities). Print Quality Printability: Yes, all pages are printable. Compatibility Operating Systems: Windows, Mac OS, Linux OS Required Software Software: Adobe Reader (or compatible PDF viewer). ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, DOHC, 4-valve, Parallel-twin Displacement: 249 cc Bore X Stroke: 55.0 x 52.4 mm Compression Ratio: 11.0:1 Performance Horsepower Approx: 30-32 HP (depending on region and tuning) Torque Approx: 17-18 lb-ft Fuel System Carburetor: Dual Keihin CVK34 (on most models within this range) Fuel Tank Capacity: 18 Liters (4.8 US gal) Lubrication Oil Type Specification: API SG, SF, SE, or SH; SAE 10W-40 (check manual for exact specification and viscosity ranges based on temperature). 🔧 Transmission Standard Type: 6-speed constant mesh Clutch: Wet, multiple disc Features Final Drive: Sealed chain 📐 Dimensions Exterior Overall Length: 2005 mm (78.9 in) Overall Width: 745 mm (29.3 in) Overall Height: 1100 mm (43.3 in) Weights Curb Weight: Approx. 168 kg (370.4 lbs) Seat Height: Approx. 780 mm (30.7 in) Wheelbase: 1370 mm (53.9 in) 🛡️ Safety Features Ratings Vehicle Class: Lightweight Sportbike Active Features Braking System: Hydraulic front disc, rear disc. Passive Features Lighting: Halogen headlight, LED taillight, incandescent turn signals. 💡 Technology Features Infotainment Display: Analog tachometer, digital speedometer, odometer, trip meters, fuel gauge, clock. Driver Assistance ABS: Not available on standard models. Connectivity Charging Port: Not standard; aftermarket options may exist. 🔧 Maintenance Service Intervals Oil Change Interval: Every 6,000 km (3,700 miles) or 6 months, whichever comes first. Air Filter Cleaning Replacement: Every 6,000 km (3,700 miles). Spark Plug Replacement: Every 12,000 km (7,500 miles). Coolant Flush Interval: Every 2 years or 24,000 km (15,000 miles). Fluid Specifications Engine Oil Capacity: 1.7 L (1.8 US qt) without filter change; 1.9 L...