Market Segment:
High-performance motocross racing segment.
Key Competitors:
Honda CRF250R, Yamaha YZ250F, KTM 250 SX-F.
Vehicle Appeal:
Renowned for its potent four-stroke engine, agile handling, and competitive performance in its class.
Value To Owner:
Essential resource for maintaining and repairing the KX250F, enabling owners to perform their own service, diagnose issues, and ensure optimal performance, saving time and money on professional labor.
Engine Systems:
Engine tear down and rebuild, internal components (piston, connecting rod, crankshaft, cylinder head, valves, cams), lubrication, cooling system, fuel system (carburetor, fuel pump).
Drivetrain Systems:
Transmission, clutch, primary reduction gear, gearshift mechanism, swingarm, rear suspension linkage.
Chassis Systems:
Frame, front forks (suspension), rear shock absorber, brakes (front and rear), wheels, tires, steering system, triple clamps.
Electrical Systems:
Ignition system, charging system (stator, flywheel, rectifier), battery, lighting (if applicable to model variant), starter system (kickstart).
Bodywork And Controls:
Body panels, plastics, seat, handlebars, throttle cable, brake levers/pedals, footpegs.
Maintenance Procedures:
Routine maintenance schedules, oil changes, filter replacements, chain adjustment, lubrication points, valve clearance adjustment, coolant changes.
Repair Procedures:
Complete engine overhaul, transmission rebuild, suspension service, brake system repair, carburetor tuning and rebuilding, electrical component testing and replacement.
Troubleshooting Guides:
Diagnostic procedures for common problems (e.g., no spark, starting issues, performance problems), symptom-based troubleshooting, error code identification (if applicable).
Installation Procedures:
Instructions for installing specific components or performing upgrades (implied by 'complete tear down and rebuild').
Technical Depth:
Highly detailed, suitable for professional mechanics and experienced DIY enthusiasts. Includes precise torque specifications, measurements, and assembly sequences for complete rebuilds.
Print Quality:
Printable and savable with no restrictions.
Binding Type:
Digital download - N/A (can be printed and bound by user)
Paper Type:
Digital download - N/A (PDF format)
Navigability:
Clickable chapters and searchable text for easy information retrieval.
Engine Type:
Liquid-cooled, four-stroke, DOHC, four-valve single-cylinder
Engine Displacement:
249cc (249 cubic centimeters)
Bore X Stroke:
72.0 x 61.1 mm (typical for this generation)
Compression Ratio:
12.5:1 (typical for this generation)
Horsepower:
Approximately 37-40 HP at peak RPM (specific figures vary by year and dyno testing).
Torque:
Specific torque figures not readily available in general product info, but the manual will contain exact specifications.
Carburetor Type:
Keihin FCR39 (Flat CR Special) with accelerator pump, digital fuel injection (DFI) was introduced later in this model's lifecycle for some variants or aftermarket upgrades, but factory spec for 2006-2008 is typically carburetor.
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
Approximately 2.1 gallons (7.9 liters) - specific figures in manual.
Engine Oil Type:
Motorcycle-specific 4-stroke engine oil, SAE 10W-40 viscosity recommended. Manual will specify exact API service classification (e.g., SG or higher).
Engine Oil Capacity:
Approximately 1.2 quarts (1.1 liters) without filter change, 1.3 quarts (1.2 liters) with filter change. Precise capacities listed in manual.
Overall Length:
Approximately 85.0 inches (2159 mm) - specific figures vary by year.
Overall Width:
Approximately 32.1 inches (815 mm) - specific figures vary by year.
Overall Height:
Approximately 49.4 inches (1255 mm) - specific figures vary by year.
Dry Weight:
Approximately 216.1 lbs (98 kg) - specific figures vary by year.
Curb Weight:
Not typically quoted for motocross bikes as it includes fluids and rider.
Seat Height:
Approximately 37.9 inches (963 mm) - specific figures vary by year.
Ground Clearance:
Approximately 13.2 inches (335 mm) - specific figures vary by year.
Infotainment Features:
None (off-road competition motorcycle).
Driver Assistance Systems:
None (off-road competition motorcycle).
Connectivity Features:
None (off-road competition motorcycle).
Ignition System:
Digital CDI (Capacitor Discharge Ignition) with variable ignition timing.
Fuel System Technology:
Carbureted with accelerator pump and jetting specifications provided in the manual. Some later models or aftermarket conversions might feature EFI.
Oil Change Interval:
Recommended every 5-10 hours of riding, or after significant racing events. Manual will provide precise recommendations based on operating conditions.
Air Filter Cleaning:
Recommended every 2-5 hours of riding, depending on dust conditions. Detailed cleaning and oiling procedure in manual.
Valve Clearance Check:
Typically every 10-20 hours of riding. Critical for maintaining engine performance. Manual will specify tolerances and adjustment procedures.
Coolant Type:
High-quality, permanent type ethylene glycol based coolant, pre-diluted with de-mineralized water. Manual will specify correct mixture ratio and capacity.
Brake Fluid Type:
DOT 4 hydraulic brake fluid. Manual will specify bleeding procedures and recommended fluid brands if applicable.
Common Wear Items:
Clutch plates, piston rings, valve stem seals, wheel bearings, fork seals, chain and sprockets are common wear items on motocross bikes. Manual will detail inspection and replacement procedures.
Engine Longevity:
Proper and regular maintenance, as detailed in the manual, is crucial for maximizing engine life and preventing premature wear.
Kawasaki Motocross History:
Kawasaki has a long and successful history in motocross racing, with the KX line being a dominant force for decades.
Kx250F Development:
The KX250F underwent significant development during the mid-2000s, transitioning to four-stroke technology and incorporating advanced chassis and engine designs to compete at the highest level.
Manufacturing Location:
Primarily manufactured in Japan.
Motocross Contributions:
The KX250F model line has consistently been a top contender in AMA Supercross and Motocross championships, earning numerous race wins and titles throughout its production years.
Rider Reviews:
Generally praised for its powerful engine and responsive handling, often cited as a favorite among professional and amateur racers.
Manufacturing Standards:
Manufactured to Kawasaki's high-quality standards for performance and durability in demanding off-road conditions.
