Segment:
Motocross Competition
Competitors:
Honda CRF250R, Yamaha YZ250F, Suzuki RM-Z250
Engine Design:
High-revving, liquid-cooled, four-stroke single-cylinder. Known for its strong mid-range and top-end power.
Chassis Design:
Lightweight aluminum perimeter frame, advanced suspension components for optimal handling and control.
Engine:
Complete engine overhaul, tuning, carburetor, ignition, lubrication, cooling, starting systems.
Chassis:
Frame, suspension (front fork, rear shock), steering, wheels, tires, brakes (front and rear).
Electrical:
Wiring diagrams, lighting, ignition system components, troubleshooting electrical faults.
Bodywork:
Fairings, seat, fuel tank, fenders, plastics removal and installation.
Maintenance:
Regular scheduled maintenance, oil changes, filter replacements, chain adjustment, spark plug checks.
Repair:
Detailed step-by-step repair procedures for all major components and systems.
Troubleshooting:
Comprehensive fault finding guides, diagnostic procedures for common and uncommon issues.
Engine Rebuild:
Complete engine disassembly, cleaning, inspection, component replacement (piston, rings, valves, bearings), and reassembly with torque specifications.
Suspension Service:
Fork seal replacement, oil changes, shock absorber service, and adjustment procedures.
Depth Level:
Comprehensive rebuild and overhaul procedures, advanced diagnostics.
Diagnostic Tools:
Guidance on using standard mechanic's tools for diagnostics and repair, no specialized electronic diagnostic equipment required for core functions.
PDF Quality:
High resolution, clear text and diagrams.
Diagram Clarity:
Top quality, highly detailed exploded pictures and diagrams.
Instruction Style:
Easy-to-read text sections with step-by-step instructions.
Diagram Type:
Highly detailed exploded pictures and diagrams.
Paper:
Not Applicable (Digital)
Engine Type:
Liquid-cooled, four-stroke, DOHC, four-valve single cylinder
Bore X Stroke:
72.0 x 61.1 mm
Compression Ratio:
12.5:1
Horsepower Estimated:
Approximately 35-40 hp (manufacturer does not publish official figures for competition bikes).
Torque Estimated:
Approximately 20-23 lb-ft (manufacturer does not publish official figures for competition bikes).
Carburetor:
Keihin FCR37 with hot start button
Fuel Type:
Unleaded gasoline, octane rating 91 or higher
Oil Type:
SAE 10W-40 motorcycle oil (JASO MA certified)
Infotainment System:
N/A (Competition Motocross Bike)
Electronic Aids:
N/A (Focus on rider input and mechanical feedback)
Connectivity Features:
N/A (Competition Motocross Bike)
Ignition System:
Digital CDI
Suspension Front:
47mm inverted cartridge fork with 20-way compression and 18-way rebound damping, 11.8 inches (300 mm) of wheel travel.
Suspension Rear:
New Uni-Trak with gas-oil unit, spring preload, 17-way positive-stop compression and 16-way rebound damping, 12.4 inches (315 mm) of wheel travel.
Oil Change Interval:
Every 15 hours of operation or as needed based on riding conditions.
Air Filter Cleaning:
Every 5 hours of operation or more frequently in dusty conditions.
Spark Plug Inspection:
Every 20 hours of operation.
Chain Lubrication Inspection:
Every 20 hours of operation or as needed.
Valve Clearance Check:
Every 30 hours of operation.
Engine Oil Capacity:
1.0 L (1.05 US qt) without filter change; 1.1 L (1.16 US qt) with filter change.
Coolant Type:
Permanent type antifreeze coolant (50% solution with distilled water).
Common Wear Items:
Clutch plates, piston rings, valve seats due to high performance demands. Suspension seals and fork oil are also critical maintenance points.
Carburetor Tuning:
Carburetor jetting may need adjustment based on altitude, temperature, and modifications for optimal performance.
Kawasaki Motorsport:
Kawasaki has a long and successful history in off-road and motocross racing, establishing a reputation for performance and durability.
Kx250F Lineage:
The KX250F was introduced as Kawasaki's competitive four-stroke motocross offering, evolving through technology updates in engine management, suspension, and chassis design.
Manufacturing Origin:
Japan
