Vehicle Segment:
High-performance competition motocross motorcycle.
Target Audience:
Motocross racers, track day enthusiasts, off-road riders seeking peak performance.
Key Competitors 2006:
Honda CRF250R, Yamaha YZ250F, Suzuki RM-Z250, KTM 250 SX-F.
Engine Technology:
Liquid-cooled, four-stroke, DOHC, four-valve engine with a focus on high RPM power delivery.
Chassis Design:
Lightweight aluminum perimeter frame for optimal rigidity and handling.
Suspension Features:
Advanced cartridge-style front forks and a sophisticated rear monoshock suspension system with extensive adjustability.
Utility For Owners:
Essential for identifying correct OEM replacement parts, understanding component breakdown for maintenance or repair, and ensuring originality.
Engine Assembly:
Cylinder, piston, crankshaft, connecting rod, valves, camshaft, timing chain, oil pump, cooling system components.
Fuel System:
Carburetor components, fuel tank, fuel lines, fuel filter.
Transmission And Drivetrain:
Gearbox internals, clutch assembly, drive sprocket, chain, rear hub components.
Suspension Front:
Front forks (internal components, seals, springs), triple clamps, steering stem, wheel axle.
Suspension Rear:
Monoshock, linkage system (swingarm, shock linkage arms, bearings), shock absorber components, swingarm.
Brakes Front:
Brake caliper, master cylinder, brake disc, brake pads, brake lines, lever assembly.
Brakes Rear:
Brake caliper, master cylinder, brake disc, brake pads, brake lines, pedal assembly.
Wheels And Tires:
Spoked wheels (rims, spokes, hubs), tires, tubes, wheel bearings, spokes, nipples.
Electrical System:
Ignition system components (spark plug, coil), wiring harnesses, kill switch, throttle stop, lighting (if applicable).
Bodywork And Controls:
Frame, subframe, plastic body panels (shrouds, fenders, seat), handlebars, grips, levers, footpegs, shifter, brake pedal.
Assembly Guidance:
Disassembly and reassembly of major components via exploded diagrams.
Part Identification:
Precise identification and numbering of all original Kawasaki parts.
Troubleshooting Aid:
Visual aid for identifying missing or incorrectly installed parts.
Maintenance Support:
Facilitates replacement of worn or damaged components during routine maintenance.
Depth:
Detailed exploded views showing every nut, bolt, washer, and internal component for each major assembly.
Usage Focus:
Primarily for identifying correct replacement parts and understanding component relationships.
Digital Format Availability:
Typically available as a PDF for digital download or on CD-ROM.
Illustration Clarity:
High-quality, clear, and precise exploded line drawings.
Physical Format Binding:
If printed, typically spiral-bound or saddle-stitched for lay-flat usability.
Physical Format Paper:
Durable paper stock, often coated, to withstand workshop environments.
Engine Type:
Four-stroke, single-cylinder, DOHC, 4 valves
Displacement:
249 cc (15.19 cu in)
Bore X Stroke:
72.0 x 61.1 mm (2.83 x 2.40 in)
Cooling System:
Liquid-cooled
Compression Ratio:
12.7:1
Claimed Horsepower:
Approximately 38-40 HP (peak estimate at crank)
Claimed Torque:
Approximately 18-20 lb-ft (peak estimate at crank)
Carburetor:
Keihin FCR37 (flat slide, CV type)
Fuel Capacity:
7.0 L (1.8 US gal)
Infotainment System:
N/A (Competition motocross motorcycle, no infotainment features).
Electronic Aids:
N/A (No electronic rider aids like traction control, ABS, or rider modes).
Connectivity Features:
N/A (No connectivity features).
Engine Technology Features
Ignition System:
Digital CDI (Capacitor Discharge Ignition) for precise spark timing.
Camshaft Drive:
Quiet, reliable cam chain drive system.
Oil Change Frequency:
Every 10-15 hours of hard riding, or as per manufacturer recommendation in a service manual.
Air Filter Cleaning:
After every few rides, or more frequently in dusty conditions.
Spark Plug Inspection:
Every 20-30 hours of riding.
Valve Clearance Check:
Every 30-50 hours of riding, or as indicated in the service manual for the specific model.
Engine Oil Type:
SAE 10W-40, API SG or higher, JASO MA certified (e.g., Kawasaki Genuine Oil, Motul 5100/7100, Yamalube).
Engine Oil Capacity:
Approximately 1.5 L (1.6 US qt) without filter change, 1.7 L (1.8 US qt) with filter change (verify in service manual).
Coolant Type:
High-quality ethylene glycol-based coolant with demineralized water (50/50 mix).
Brake Fluid Type:
DOT 4 hydraulic brake fluid.
Typical Wear Items:
Clutch plates, brake pads, wheel bearings, fork seals, piston rings, and valve guides are common wear items on high-performance motocross bikes.
Carburetor Tuning Challenges:
The Keihin FCR carburetor, while excellent, can sometimes require meticulous jetting adjustments for optimal performance across different altitudes and temperatures.
Suspension Maintenance Importance:
Regular service of front forks and rear shock is crucial for maintaining optimal handling and preventing seal leaks.
Kawasaki Motocross Legacy:
Kawasaki has a long and successful history in motocross racing, with the KX line being a cornerstone of their off-road performance efforts.
Kx250F Development Trajectory:
The KX250F was a relatively new model in 2006, representing a significant shift from two-stroke motocross bikes to four-stroke technology, aiming to compete directly with established four-stroke models from other manufacturers.
Key Updates 2006:
The 2006 model typically featured refinements to the engine and suspension based on feedback from previous years' models, improving power delivery and handling characteristics. Aluminum frame technology was a key differentiator.
Manufacturing Location:
Primarily Japan
