Category:
High-performance motocross motorcycle.
Rivals:
Competes directly with other 250cc four-stroke motocross bikes from manufacturers like Yamaha (YZ250F), Honda (CRF250R), KTM (250 SX-F), and Husqvarna (FC 250).
Design Philosophy:
Focuses on a powerful engine, agile handling, and advanced suspension for competitive motocross racing.
Dealership Use:
Identical to manuals used by authorized Kawasaki dealerships, indicating official and comprehensive technical data.
Engine:
Engine overhaul, top-end and bottom-end assembly, valve train, lubrication, cooling system, fuel injection (DFI), ignition system.
Drivetrain:
Clutch assembly and operation, transmission disassembly and assembly, gear ratios, shift mechanism, final drive (chain and sprockets).
Chassis:
Frame inspection and repair, suspension (forks and rear shock absorber) disassembly, assembly, tuning, and service, steering system, wheels and bearings, braking system (front and rear).
Electrical:
Wiring diagrams, lighting system, ignition system components, battery maintenance, EFI system components.
Maintenance:
Routine maintenance checks, oil changes, filter replacements, chain adjustment, spark plug replacement, air filter cleaning, valve clearance adjustment.
Troubleshooting:
Diagnostic procedures for common problems, fault finding charts, symptom-based troubleshooting guides.
Repair:
Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and adjustment.
Technical Data:
Torque specifications, clearances, measurements, timing information, electrical resistance values.
Depth:
In-depth technical information suitable for professional mechanics and experienced DIY enthusiasts. Covers complete engine rebuilds, suspension tuning, and advanced diagnostic procedures.
Quality:
High-resolution PDF, ensuring clear and legible text and diagrams. Searchable text for quick information retrieval.
Recommendation:
Printable on standard paper sizes (A4/Letter) for easy on-site referencing. Print only necessary sections to save ink and paper.
User Options:
No physical binding; digital format allows for user-defined printing and binding (e.g., three-ring binder).
User Options:
Not applicable (digital format). User may choose paper type for printing based on preference.
Type:
Liquid-cooled, four-stroke, DOHC, four-valve single-cylinder.
Displacement:
249 cc (exact displacement may vary slightly by model year).
Bore X Stroke:
Typically around 77.0 x 53.6 mm (specific values for target model year should be confirmed).
Horsepower:
Estimated 39-42 HP at peak RPM (varies by model year and tuning).
Torque:
Estimated 28-30 Nm at peak RPM (varies by model year).
Type:
Digital Fuel Injection (DFI) with dual injectors (e.g., throttle body injector and further injector) and a throttle position sensor (TPS).
Fuel Type:
Unleaded gasoline, minimum 91 octane (RON+MON)/2.
Type:
Liquid-cooled, with radiator and fan.
Type:
Semi-dry sump lubrication.
Type:
Constant mesh, 5-speed sequential.
Gear Ratios:
Specific ratios vary by model year; manual will detail each gear's ratio.
Clutch Type:
Wet, multi-disc, cable-actuated.
Final Drive:
Chain drive, with specific chain pitch (e.g., 520) and sprocket combinations detailed in the manual.
Length:
Approx. 2185 mm (varies slightly by model year).
Width:
Approx. 820 mm (varies slightly by model year).
Height:
Approx. 1270 mm (varies slightly by model year).
Wheelbase:
Approx. 1485 mm (varies slightly by model year).
Curb Weight:
Approx. 104-106 kg (dry weight, without fuel and fluids).
Fuel Tank Capacity:
Approx. 6.0 - 6.5 Liters.
Classification:
Competition Use Only (Off-road Motorcycle) - Not street legal.
Braking System:
Hydraulic disc brakes front and rear. Manual details caliper piston sizes, pad types, and fluid specifications.
Frame Design:
Perimeter frame designed for rigidity and mass centralization.
Features:
Not applicable (competition motorcycle). Focus is on performance and adjustability.
Features:
Not applicable. The manual covers the mechanical and electrical systems for optimal rider control.
Features:
Some later models may feature a tuning coupler for engine mapping adjustments, covered in the manual.
Capabilities:
The manual details the Kawasaki FI Calibration Unit (if applicable for the specific model year) for adjusting fuel and ignition mapping to suit track conditions and rider preference.
Oil Change:
Every 15 hours of riding or annually. Manual specifies oil type and grade (e.g., SAE 10W-40).
Air Filter:
Clean after every 5-10 hours of riding, replace as needed. Manual specifies filter type and cleaning procedure.
Valve Clearance:
Check every 10-15 hours of riding. Manual provides specific clearance values and adjustment procedures using shims.
Engine Oil:
SAE 10W-40 API SG or higher, JASO MA certified. Manual will specify capacity (e.g., 0.8 - 1.0 Liters).
Coolant:
Mixture of high-quality ethylene glycol based coolant and distilled water (typically 50/50 ratio). Manual specifies capacity and type.
Brake Fluid:
DOT 4 hydraulic brake fluid. Manual specifies type and bleeding procedure.
Common Wear Items:
Clutch plates, piston rings, valve guides, wheel bearings, fork seals, chain and sprockets are common wear items on high-performance motocross bikes.
Potential Failures:
Fuel injector clogging, ignition coil failure, and occasional transmission issues can occur with aggressive use and inadequate maintenance. Manual addresses diagnosis for these.
Motorsport Focus:
Kawasaki has a long and successful history in professional motocross and Supercross racing, with the KX line being a cornerstone of their dirt bike offerings.
Kx Line:
The KX250F has undergone significant evolution, transitioning from carbureted models to fuel-injected systems, with continuous improvements in engine performance, chassis dynamics, and suspension technology.
Manufacturing Location:
Primarily manufactured in Japan.
