Model Code:
EX250J / EX250K
Chassis Code Range:
EX250JFA, EX250JFB, EX250JFC, EX250JFD, EX250JFE, EX250JFF, EX250KFA, EX250KFB, EX250KFC, EX250KFD, EX250KFE, EX250KFF
Generation Identifier:
Second Generation (J/K Series)
Wsm Identifier:
Kawasaki Ninja 250R 2008-2012 WSM Service Manual Repair
Segment:
Entry-level sportbike, beginner-friendly motorcycle.
Target Audience:
New riders, commuters, and those seeking an affordable and fun sportbike experience.
Key Competitors:
Honda CBR250R, Yamaha YZF-R25 (later models), Ninja 300 (successor), KTM RC 200, Hyosung GT250R.
Performance Orientation:
Sportbike styling with accessible performance.
Engine Configuration:
Liquid-cooled, parallel-twin engine.
Fueling:
Electronic Fuel Injection (EFI) for improved throttle response and efficiency.
Design Language:
Aggressive, aerodynamic fairings inspired by larger Ninja models.
Model Years Covered:
2008, 2009, 2010, 2011, 2012
Regional Variations Covered:
Likely covers major global specifications, including North American, European, and Asian market variants, though specific regional differences may be noted within the manual.
Estimated Page Count:
400-600 pages (typical for a comprehensive WSM)
Manual Classification:
Workshop Service Manual (WSM)
Primary Purpose:
In-depth repair, maintenance, and troubleshooting for certified technicians and advanced DIY enthusiasts.
Primary Language:
English
Delivery Format:
Digital (likely PDF), potentially with printable pages.
Engine:
Complete disassembly, assembly, inspection, troubleshooting, and repair of the 249cc parallel-twin engine, including valve clearance, timing, lubrication system, cooling system, fuel injection (FI), ignition system, and emissions control.
Transmission:
Inspection, maintenance, and repair of the 6-speed constant mesh gearbox, clutch assembly (wet multi-plate), shift drum and forks, and related components.
Chassis And Suspension:
Front fork (telescopic) disassembly, overhaul, and adjustment; rear shock absorber inspection and replacement; swingarm and linkage service; steering head bearing service.
Brakes:
Front and rear brake system maintenance, including hydraulic fluid bleeding, pad replacement, caliper inspection, rotor inspection, and master cylinder service. ABS variations, if applicable to specific markets, would be covered.
Electrical System:
Wiring diagrams, starter system, charging system (alternator, regulator/rectifier), battery specifications, lighting circuits (headlight, taillight, indicators), instrument panel functions, and electrical troubleshooting procedures.
Fuel System:
Fuel tank maintenance, fuel pump operation, fuel filter replacement, and troubleshooting of the fuel injection system, including sensor diagnostics (TPS, MAP, IAT, O2). Carbureted versions may be covered in separate sections or earlier model years.
Cooling System:
Radiator, fan, thermostat, water pump, and coolant circuit maintenance, including coolant type and capacity specifications.
Bodywork And Frame:
Fairing removal and installation, seat, fuel tank cover, and other body panels. Frame inspection and potential repair guidelines.
Wheels And Tires:
Tire inspection, pressure recommendations, wheel bearing maintenance, and wheel removal/installation.
Maintenance Procedures:
Oil and filter changes, air filter cleaning/replacement, spark plug inspection/replacement, chain adjustment and lubrication, brake fluid replacement, coolant replacement, battery care, and general inspection checks.
Repair Procedures:
Complete engine overhaul, transmission rebuild, suspension fork rebuild, brake caliper overhaul, electrical component replacement, clutch replacement, and more.
Troubleshooting Guides:
Systematic diagnostic procedures for common and uncommon issues, fault code interpretation (if applicable to FI system), and circuit analysis.
Torque Specifications:
Precise torque values for critical fasteners throughout the motorcycle.
Special Tools:
Identification of specialized tools required for specific maintenance and repair tasks.
Diagnostic Capabilities:
Advanced diagnostic information for the fuel injection and ignition systems, including sensor readings and ECU logic.
Rebuild Guidelines:
Comprehensive instructions for complete engine and transmission rebuilds, including component tolerances and specifications.
Electrical Schematics:
Detailed wiring diagrams for all electrical systems, crucial for troubleshooting.
Searchability:
Typically searchable text within the PDF for quick information retrieval.
Resolution And Clarity:
Professional quality, with clear diagrams, illustrations, and text, suitable for printing specific pages or the entire manual.
Digital Format Consideration:
N/A (as digital), but if printed, professional binding is implied for longevity.
Digital Format Consideration:
N/A (as digital), but if printed, typically on durable, high-quality paper.
Engine Type:
Liquid-cooled, four-stroke, DOHC, parallel-twin
Displacement:
249 cc (cubic centimeters)
Bore X Stroke:
55.0 x 52.4 mm
Compression Ratio:
11.0:1
Horsepower Peak:
Approximately 30-32 PS (22-23.5 kW) @ 10,500 rpm (Varies slightly by market and testing method)
Torque Peak:
Approximately 20-22 Nm (15-16 lb-ft) @ 8,000 rpm (Varies slightly by market and testing method)
Fuel Delivery:
Electronic Fuel Injection (EFI)
Fuel Tank Capacity:
18 Liters (4.8 US gallons)
Recommended Fuel:
Unleaded gasoline, 87 octane or higher (RON 91 or higher)
Oil Type:
SAE 10W-40 API SG or SH, JASO MA
Oil Capacity With Filter Change:
Approximately 1.7 Liters (1.8 US quarts)
Coolant Type:
Ethylene glycol based coolant (50/50 mixture with distilled water)
Crash Test Results:
Motorcycles of this era typically do not undergo standardized automotive crash testing (e.g., NHTSA, Euro NCAP). Safety is primarily assessed through handling, braking, and rider protection features.
Braking System:
Standard front disc brake, rear disc brake. Optional ABS available on some models/markets.
Lighting:
Halogen headlight, LED taillight, standard turn signals.
Frame Design:
High-tensile steel diamond frame for rigidity and rider confidence.
Ergonomics:
Sporty yet upright riding position for comfort and control.
Engine Oil And Filter:
Every 6,000 km (3,700 miles) or 12 months, whichever comes first.
Air Filter:
Inspect every 6,000 km (3,700 miles), clean or replace as needed. Replace every 12,000 km (7,500 miles).
Spark Plugs:
Inspect every 6,000 km (3,700 miles), replace every 12,000 km (7,500 miles).
Valve Clearance:
Check every 24,000 km (15,000 miles).
Brake Fluid:
Replace every 2 years or as needed.
Coolant:
Replace every 2 years or as needed.
Chain Lubrication And Adjustment:
Lubricate every 1,000 km (600 miles) or after riding in rain; adjust as needed.
Engine Oil:
SAE 10W-40 API SG or SH, JASO MA
Coolant:
50% Ethylene Glycol and 50% Distilled Water
Common Wear Items:
Clutch plates, chain and sprockets, brake pads, tires, fork seals, and battery are typical wear items.
Potential Fi Issues:
While generally reliable, like any FI system, sensor issues (TPS, MAP, O2) can occur, typically diagnosed with the manual.
Cooling System Efficiency:
Ensuring the cooling system is clean and the fan operates correctly is crucial for preventing overheating, especially in stop-and-go traffic.
Kawasaki Legacy:
Kawasaki Heavy Industries has a long-standing reputation for performance motorcycles, particularly in the sportbike and racing categories, dating back to the 1960s.
Ninja Lineage:
The Ninja 250R is part of Kawasaki's renowned Ninja sportbike family, which includes iconic models like the Ninja ZX-6R and Ninja ZX-10R. This model represents the entry-level segment of that lineage.
Generation Transition:
The 2008 model year marked a significant redesign from the previous EX250-F generation, introducing fuel injection, a more aerodynamic fairing, and an updated chassis, becoming known as the J/K series.
Manufacturing Location:
Primarily manufactured in Thailand.
Market Introduction:
The Ninja 250R nameplate has a long history, with the 2008 redesign ushering in this specific iteration for the global market.
