Product Type:
Service Manual
Model Years Covered:
2008, 2009, 2010, 2011, 2012
Chassis Codes:
EX250J8, EX250J9, EX250JA, EX250JB, EX250JC
Vin Prefix Examples:
JKAEXMJ1#8DA00001 AND UP (2008), JKAEXMJ1#9DA17355 AND UP (2009), JKAEXMJ1#ADA49773 AND UP (2010), JKAEXMJ1#BDA71588 AND UP (2011), JKAEXMJ1#CDA96621 AND UP (2012)
Vehicle Segment:
Entry-level sportbike, popular for new riders and urban commuting
Key Competitors:
Honda CBR250R, Yamaha YZF-R25 (depending on market and year overlap), Ninja 300 (later models)
Vehicle Appeal:
Affordable performance, lightweight handling, fuel efficiency, sporty styling
Target Audience:
DIY mechanics, motorcycle enthusiasts, repair shops, owners looking for in-depth maintenance and repair knowledge
Ease Of Use:
Designed for easy-to-read text and clear, instructional diagrams to facilitate accurate repairs
Diagnostic Coverage:
Comprehensive troubleshooting for all major systems
Repair Coverage:
Detailed step-by-step repair procedures for all components and systems
Maintenance Coverage:
Complete scheduled maintenance procedures and recommendations
Type:
Factory Service Manual / Shop Manual
Primary Language:
English
Engine:
Complete engine overhaul, fuel system, ignition system, lubrication system, cooling system, exhaust system
Transmission:
Clutch system, gearbox, shifting mechanism, lubrication
Chassis:
Frame, suspension (front forks, rear shock absorber), steering system, wheels, tires
Brakes:
Front and rear brake systems (hydraulic, calipers, master cylinders, brake lines, pads, rotors)
Electrical:
Battery, charging system (alternator, rectifier/regulator), ignition system, lighting system, starter system, instrumentation, wiring diagrams
Bodywork:
Fairings, seat, fuel tank, fenders, handlebars, controls
Preventative Maintenance:
Regular checks, fluid changes, filter replacements, lubrication points
Troubleshooting:
Systematic fault finding for common and uncommon issues with diagnostic flowcharts
Disassembly Reassembly:
Complete guide for component removal and reinstallation
Adjustment:
Carburetor synchronization, clutch adjustment, chain adjustment, valve clearance adjustment
Overhaul:
Detailed instructions for engine, gearbox, and suspension component rebuilds
Diagnostic Level:
Advanced diagnostics, including electrical system testing and interpretation of symptoms
Repair Level:
Complete repair and overhaul of all mechanical and electrical components
Diagram Quality:
High-quality, detailed exploded diagrams and schematics for precise identification and assembly
Instruction Style:
Step-by-step instructions, clearly written for efficient and accurate execution of tasks
PDF Searchability:
Searchable text content for quick information retrieval
Diagram Resolution:
High resolution for clarity of detail in diagrams and illustrations
Digital Format:
Digital PDF (not a physical binding)
Digital Media:
Digital file for electronic viewing and printing
Engine Type:
Liquid-cooled, 4-stroke, DOHC, parallel-twin
Displacement:
249 cc (15.2 cu in)
Bore X Stroke:
62.0 x 41.2 mm (2.44 x 1.62 in)
Compression Ratio:
11.0:1
Horsepower Est:
~30-32 HP @ 10,500 RPM (peak figures may vary slightly by year)
Torque Est:
~16-17 lb-ft @ 8,000 RPM (peak figures may vary slightly by year)
Carburetion:
Keihin CVK34 carburetors (dual) for 2008-2010 models; Fuel Injection (DFI) for 2011-2012 models (specific market dependent)
Fuel Type:
Unleaded gasoline, minimum 87 octane
Oil Type:
SAE 10W-40 API SG or SH; JASO MA recommended (e.g., Kawasaki Genuine Oil, Motul 5100 10W-40)
Coolant Type:
Ethylene glycol-based coolant (50/50 mixture with distilled water), e.g., Kawasaki Coolant Type 2
Transmission Type:
Constant mesh, 6-speed return
Clutch Type:
Wet, multiple-disc, slipper clutch (standard)
Final Drive:
Sealed chain drive
Transmission Oil Type:
SAE 80W-90 API GL-4 (e.g., Kawasaki Genuine Gear Oil, Bel-Ray 80W Gear Saver)
Braking System:
Front: Single 290mm petal disc with dual-piston caliper; Rear: 220mm petal disc with dual-piston caliper. ABS available on select models/markets.
Lighting:
Halogen headlamp, LED tail lamp
Frame Design:
High-tensile steel backbone frame for rigidity and rider feedback
Tires:
Front: 110/70-17 M/C 54S; Rear: 130/70-17 M/C 62S (typical sizes, may vary)
Instrumentation:
Digital speedometer, analog tachometer, odometer, trip meter, clock, indicator lights (e.g., turn signals, high beam, neutral).
ABS:
Anti-lock Braking System (ABS) was an optional feature on some models/markets within this generation.
ECU Diagnosis:
For fuel-injected models, the ECU can be diagnosed via diagnostic connectors as detailed in the manual.
Oil Change Interval:
Every 3,000-4,000 miles or 6 months (whichever comes first), refer to manual for exact mileage/time and oil type.
Air Filter Cleaning Replacement:
Inspect every 3,000 miles; clean or replace as needed, depending on riding conditions.
Spark Plug Replacement:
Replace every 7,500-15,000 miles, or as recommended by the manual based on plug type (e.g., Iridium plugs have longer service life).
Chain Maintenance:
Lubricate and adjust every 600 miles or as needed based on slack. Check drive chain wear.
Valve Clearance Check:
Check and adjust every 7,500-15,000 miles (or as specified for specific model year in the manual).
Brake Fluid Type:
DOT 4 (e.g., Kawasaki Genuine Brake Fluid, Castrol DOT 4)
Coolant Capacity:
~1.2 L (0.32 US gal)
Carburetor Sync Carb Models:
Carburetors may require periodic synchronization for optimal performance and idle stability, especially as they age.
Fuel Injector Cleaning Efi Models:
For FI models, periodic cleaning of fuel injectors might be beneficial for maintaining optimal fuel delivery.
Clutch Cable Wear:
Clutch cable can stretch over time, requiring adjustment or replacement for proper clutch engagement.
Charging System Reliability:
Occasional reports of stator or rectifier/regulator issues, especially on higher-mileage units; manual aids in diagnosing these.
Kawasaki Legacy:
Kawasaki Heavy Industries, Ltd. has a long history of producing high-performance motorcycles across various categories, known for engineering prowess.
Ninja Lineage:
The Ninja 250R (EX250) has been a staple in Kawasaki's lineup for decades, consistently evolving to meet performance and emissions standards while maintaining its reputation as an accessible sportbike.
Manufacturing Location:
Primarily manufactured in Thailand for global markets.
Key Updates In Period:
Transition from carburetion to fuel injection for 2011-2012 models in many markets, improving emissions and throttle response.
Popular Motorcycle Award:
Consistently praised by motorcycle publications for its value, reliability, and suitability as a beginner sportbike.
Segment Performance:
Rated highly within the lightweight sportbike category for its balance of performance and affordability.
Emissions Standards:
Designed to meet prevailing emissions standards for its respective model years and markets.
