The Kawasaki Ninja EX250, also known by its chassis codes EX250K8F through EX250KCF, represents a significant offering in the entry-level sportbike segment. Produced between 2008 and 2012, this model is celebrated for its aggressive styling, mirroring its larger Ninja siblings, and its approachable performance tailored for new riders and urban commuters. Powered by a 249 cc liquid-cooled, 4-stroke parallel-twin engine with fuel injection, it delivers an engaging yet manageable riding experience, complemented by a responsive 6-speed transmission. Its design philosophy emphasizes a balance of sporty aesthetics and practical usability, making it a popular choice for those seeking an economical and nimble sportbike experience.
This comprehensive Factory Service Manual provides essential information for the maintenance and repair of the Kawasaki Ninja EX250 models from 2008 to 2012. It covers a wide array of mechanical and electrical systems, including detailed procedures for engine, transmission, clutch, fuel, cooling, lubrication, chassis, suspension, braking, and steering. The manual also includes extensive electrical system diagnostics, wiring diagrams, and troubleshooting guides for various components. Owners and technicians will find step-by-step instructions for scheduled maintenance, component overhauls, and repair procedures, ensuring the longevity and optimal performance of the vehicle.
Generation Designation:
EX250-K
Chassis Codes:
EX250K8F, EX250K9F, EX250KAF, EX250KBF, EX250KCF
Segment:
Entry-level sportbike, Lightweight sportbike, Beginner motorcycle
Key Competitors Era:
Honda CBR250R, Suzuki GS500F (competitor in performance/price class), Yamaha YZF-R3 (later competitor), Ninja 300 (successor model)
Design Philosophy:
Aggressive styling inspired by larger Ninja sportbikes, approachable performance for new riders.
Target Audience:
New motorcyclists, urban commuters, riders seeking an economical and nimble sportbike experience.
Years Covered:
2008, 2009, 2010, 2011, 2012
Estimated Page Count:
Approx. 300-500 (Typical for a WSM of this era, exact count not provided in source)
Type:
Factory Service Manual (WSM - Workshop Service Manual)
Format:
Digital (likely PDF, based on common aftermarket offerings)
Mechanical Systems:
Engine, Transmission, Clutch, Fuel System, Exhaust System, Cooling System, Lubrication System, Chassis, Suspension (Front & Rear), Braking System, Wheels & Tires, Steering System
Electrical Systems:
Ignition System, Lighting System, Starting System, Charging System, Instrumentation, Wiring Diagrams, Troubleshooting Electrical Faults
Maintenance Procedures:
Scheduled Maintenance, Oil Changes, Filter Replacement, Chain Adjustment, Spark Plug Replacement, Air Filter Cleaning/Replacement, Brake Fluid Flush, Coolant Flush
Repair Procedures:
Engine Overhaul (Top-end & Bottom-end), Transmission Repair, Clutch Replacement, Carburetor Rebuilding, Suspension Component Replacement, Brake Caliper Overhaul, Electrical Component Diagnosis and Replacement
Diagnostic Capability:
Detailed troubleshooting guides, diagnostic flowcharts, fault code identification (if applicable to the model's diagnostics).
Rebuild Instructions:
Comprehensive instructions for engine, transmission, and suspension component rebuilds with torque specifications and clearances.
Digital Format Details:
Searchable PDF, High-resolution scans of original factory manual pages.
Print Quality:
N/A (digital product)
Binding Type:
N/A (digital product)
Paper Type:
N/A (digital product)
Engine Type:
Liquid-cooled, 4-stroke, DOHC, parallel-twin
Displacement:
249 cc (Cubic Centimeters)
Bore X Stroke:
55.0 x 52.4 mm (Millimeters)
Compression Ratio:
11.7:1
Horsepower Est:
Approx. 30-34 PS (Pferdestärke) / 22-25 kW @ ~11,000 rpm (Exact figures vary by region and specific model year, manual provides exact dyno charts and power curves)
Torque Est:
Approx. 22-24 Nm @ ~9,000 rpm (Exact figures vary by region and specific model year)
Fuel Delivery:
Fuel Injection (EFI) - Keihin throttle bodies (specific model year dependent, earlier models may have carburetors, manual covers injection for this range)
Fuel Type:
Unleaded gasoline, minimum octane rating 87 (RVP 9.0 psi)
Ignition System:
Digital CDI with electronic ignition advance
Lubrication System:
Forced lubrication (wet sump)
Cooling System:
Liquid-cooled
Transmission Type:
6-speed, constant mesh, sequential
Optional Transmission:
N/A
Clutch Type:
Wet, multiple-disc, cable operated
Final Drive:
O-ring sealed chain drive
Overall Length:
2004 mm (78.9 in)
Overall Width:
719 mm (28.3 in)
Overall Height:
1130 mm (44.5 in)
Wheelbase:
1370 mm (53.9 in)
Ground Clearance:
155 mm (6.1 in)
Seat Height:
775 mm (30.5 in)
Dry Weight:
Approx. 146 kg (321.9 lbs) (Exact varies by spec)
Curb Weight:
Approx. 163 kg (359.4 lbs) (Approximate, including all necessary fluids and a full tank of fuel)
Fuel Capacity:
17 L (4.5 US gal)
Safety Certifications:
Meets relevant safety standards for motorcycles in primary markets (e.g., DOT, ECE).
Braking System Front:
Single 290 mm petal disc with dual-piston caliper
Braking System Rear:
Single 220 mm petal disc with dual-piston caliper
ABS:
Optional ABS (Anti-lock Braking System) available on some market variants, check specific model. Manual will detail ABS system diagnostics if equipped.
Lighting:
Halogen headlight, LED taillight
Infotainment System:
N/A (basic rider instrumentation)
Rider Assistance Features:
ABS (Optional), LED taillight.
Connectivity Features:
N/A
Dashboard Display:
Analog tachometer, digital speedometer, odometer, trip meter, fuel gauge, clock, indicator lights.
Initial Service:
First service typically recommended at 600 miles (1,000 km) or 1 month, covering oil change, filter check, chain adjustment, and general inspection. Manual will specify exact mileage/time.
Regular Oil Change:
Every 3,700 miles (6,000 km) or 6 months. Manual provides specific recommendations.
Air Filter Cleaning:
Every 7,500 miles (12,000 km) or 12 months. Replacement as needed.
Spark Plug Replacement:
Typically every 7,500 miles (12,000 km) or as per manual's recommendation based on wear. Manual lists specific plug types and gaps.
Engine Oil Type:
SAE 10W-40 API SG or SH or SJ or SL classification with JASO MA or MA2 specification. Manual will list exact viscosity and JASO rating.
Engine Oil Capacity:
Approx. 1.7 L (1.8 US qt) with filter change. Manual will provide precise capacity.
Coolant Type:
Ethylene glycol based coolant, 50/50 mix with distilled water. Manual specifies Kawasaki brand or equivalent.
Brake Fluid Type:
DOT 4 standard. Manual will recommend specific brands or types.
Common Wear Items:
Chain and sprockets wear, brake pads, tires, clutch plates (under heavy use).
Potential Issues Documented:
Minor electrical gremlins (rare), carb synchronization issues on older models (though this generation is EFI), cam chain tensioner noise (can be addressed with replacement).
Kawasaki Legacy:
Kawasaki Heavy Industries has a long history of motorcycle manufacturing, known for performance and innovation across various segments, from sportbikes to cruisers.
Ex250 Lineage:
The EX250 Ninja platform has been a staple in Kawasaki's lineup for decades, evolving from carbureted models to fuel-injected versions like the 2008-2012 generation. This generation marked a significant styling update and technological improvements.
Manufacturing Location:
Primarily manufactured in Japan, with potential assembly in other locations depending on market.
Production Years For This Generation:
2008-2012
Awards And Accolades:
Consistently praised for its value, reliability, and beginner-friendliness in motorcycle reviews of its era. Often cited as a benchmark for entry-level sportbikes.
