This manual covers the Ninja EX250 (model variant EX250-J) motorcycles produced between 2008 and 2012. Known for its accessible performance, sporty styling, and reliability, the Ninja 250 is a popular choice for new riders and those seeking an economical and user-friendly sportbike. Its 249cc parallel-twin, liquid-cooled engine, paired with a 6-speed transmission, offers a balance of power and efficiency for both commuting and recreational riding. The engineering quality reflects a commitment to delivering dependable and enjoyable motorcycles, making the Ninja 250 a well-regarded option in its segment. This comprehensive Factory Service Manual provides detailed information essential for the maintenance, repair, and servicing of your Ninja EX250. It includes step-by-step procedures for engine overhaul, fuel system servicing, transmission and clutch maintenance, electrical system diagnostics, chassis component repair, and braking system service. The manual also covers scheduled maintenance tasks, troubleshooting guides for common issues, torque specifications, and the use of special tools. With its detailed diagrams, high-resolution illustrations, and in-depth technical specifications, this manual serves as an indispensable resource for owners and technicians aiming to keep the vehicle in optimal condition. 🏷️ Basic Information Identification Make: Kawasaki Model: Ninja EX250 Model Variant: EX250-J (Ninja 250R) Years Covered: 2008, 2009, 2010, 2011, 2012 Codes Chassis Code: EX250J8F (2008), EX250J9F (2009), EX250JF (2010), EX250JFF (2011), EX250JGF (2012) 👋 Introduction Market Position Segment: Entry-level sportbike / Lightweight motorcycle Target Audience: New riders, commuters, budget-conscious sportbike enthusiasts. Competitive Analysis Key Competitors: Honda CBR250R, Suzuki GS500F (older models), Yamaha R3 (later competitor). Key Features Design Philosophy: Accessible performance, user-friendly operation, sporty styling. Reputation: Known for reliability, fuel efficiency, and affordability. 📋 Manual Details Coverage Areas Manual Type: Factory Service Manual / Workshop Manual Language: English Format: Downloadable Digital File (likely PDF) Page Count Estimated Page Count: Approximately 400-500 pages (typical for this model's service manual) 📖 Manual Coverage Systems Covered Engine Mechanics: Complete engine overhaul, disassembly, assembly, valve adjustments, timing chain, lubrication system, cooling system. Fuel System: Carburetor inspection, cleaning, adjustment, fuel pump, fuel tank, fuel lines. Transmission: Clutch operation, gearbox inspection, disassembly, reassembly, shift mechanism, lubrication. Electrical System: Ignition system, starting system, charging system (alternator, battery), lighting, instrumentation, wiring diagrams. Chassis Components: Front fork (suspension), rear shock absorber, swingarm, steering system, wheel bearings. Braking System: Front and rear brake pad replacement, caliper service, master cylinder overhaul, brake fluid bleeding, brake line inspection. Bodywork And Frame: Fairing removal and installation, seat, fuel tank mounting, frame inspection. Procedures Included Scheduled Maintenance: Oil changes, filter replacements, chain maintenance, spark plug replacement, air filter cleaning/replacement, coolant checks. Troubleshooting: Diagnostic charts for common problems (e.g., engine not starting, poor performance, electrical issues). Disassembly Assembly: Step-by-step instructions for dismantling and reassembling major components and sub-assemblies. Torque Specifications: Precise torque values for all critical fasteners (engine, chassis, wheels). Special Tools: Identification and usage of specialized tools required for certain procedures. Technical Depth Diagnostic Capabilities: Detailed diagnostic procedures and symptom-based troubleshooting guides. Rebuild Instructions: Comprehensive instructions for complete engine and gearbox rebuilds. Wiring Diagrams: Detailed, color-coded electrical wiring diagrams for all circuits. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable, allowing quick access to specific information. Printability: Designed for printing individual pages or sections as needed. Print Quality Image Resolution: High-resolution images, diagrams, and illustrations for clarity. Binding Type Digital Format Notes: N/A (Digital download) Paper Type Digital Format Notes: N/A (Digital download) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, DOHC, parallel-twin Displacement: 249 cc (249cc) Bore X Stroke: 55.0 mm x 52.4 mm Cooling System: Liquid-cooled Compression Ratio: 11.0:1 Performance Horsepower: Approximately 30-34 HP (at crankshaft, depending on market and tuning) Torque: Approximately 17-19 lb-ft (at crankshaft) Fuel System Carburetion: Dual Keihin CVK34 carburetors Fuel Tank Capacity: 18 Liters (4.8 US gal) Lubrication Oil Type Specification: API SG, SH, SJ, SL or SM classification SAE 10W-40 or SAE 20W-50 Oil Capacity With Filter: 1.9 L (2.0 US qt) Spark Plugs Recommended Spark Plug: NGK CR9EIA-9 or DENSO VUH27A 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Clutch Type: Wet, multi-disc Features Gear Ratios: 1st: 2.750 (33/12), 2nd: 1.944 (35/18), 3rd: 1.556 (28/18), 4th: 1.333 (32/24), 5th: 1.150 (23/20), 6th: 1.000 (26/26) Final Drive: O-ring sealed chain Transmission Oil Type: API GL-4 SAE 80 or 85W-90 gear oil Transmission Oil Capacity: 0.53 L (0.56 US qt) 📐 Dimensions Exterior Length: 2,000 mm (78.7 in) Width: 750 mm (29.5 in) Height: 1,130 mm (44.5 in) Wheelbase: 1,370 mm (53.9 in) Ground Clearance: 155 mm (6.1 in) Weights Curb Weight: Approximately 168 kg (370.4 lbs) Front Tire Size: 110/70-17 M/C 54H Rear Tire Size: 130/70-17 M/C 62H Wheel Bolt Pattern: N/A (Cast wheels) 🛡️ Safety Features Ratings Crash Test Data: N/A (Motorcycles typically not subjected to car-style crash tests) Active Features Braking System: Front: 290mm petal disc with dual-piston caliper. Rear: 220mm petal disc with dual-piston caliper. (Optional ABS not available for...