Segment:
High-Performance Motocross
Target Audience:
Motocross racers, mechanics, and enthusiasts seeking in-depth repair and maintenance knowledge.
Key Competitors:
Yamaha YZ250F, Honda CRF250R, Suzuki RM-Z250, KTM 250 SX-F
Unique Selling Points:
Comprehensive coverage, factory-level accuracy, user-friendly digital format with search and print capabilities, lifetime replacement guarantee.
Engine Mechanical:
Complete tear down and rebuild, cylinder head, piston, conrod, crankshaft, valve clearance, camshaft, valve timing, lubrication system, cooling system, motor overhaul.
Fuel System:
Carburetor (CVK) specifications, jetting, mixture screw adjustment, fuel pump, fuel tank, fuel line.
Ignition System:
Ignition timing, stator, coil, spark plug specifications, CDI unit.
Transmission Drivetrain:
Gear ratios, clutch operation, transmission overhaul, primary reduction gear, drive train components.
Suspension:
Front forks (KYB AOS-II), rear shock absorber (KYB), linkage system, spring rates, damping adjustments, strut specifications.
Brakes:
Front and rear brake caliper, rotor, master cylinder, brake pads, hydraulic system, bleeding procedures.
Electrical System:
Wiring schematic, battery, starter motor, rectifier, switches, lights, charging system.
Chassis Bodywork:
Frame, subframe, triple trees, handlebars, fenders, seat, plastics, wheels, axles, swingarm.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, coolant replacement, chain adjustment, tire pressure checks.
Troubleshooting:
Comprehensive diagnostic procedures for common problems, no spark issues, starting problems, performance issues.
Repair Rebuild:
Detailed step-by-step instructions for engine rebuilds, transmission overhauls, suspension servicing, and component replacement.
Adjustments:
Carburetor idle adjustment, mixture screw, clutch cable, throttle cable, suspension adjustments.
Depth:
Full workshop level, covering basic to advanced repair and diagnostics.
Data Included:
Torque specifications, clearances, fluid capacities, electrical data, performance specifications.
Visuals:
Includes pictures and part diagrams.
Engine Code:
Likely based on Kawasaki's K-series engine architecture
Displacement:
249 cc (approx.)
Bore:
Specific to model, likely around 72 mm
Stroke:
Specific to model, likely around 61.2 mm
Compression Ratio:
Refer to manual for exact specification (typically 12.5:1 or higher)
Horsepower:
Refer to manual for exact specification (typically 35-40 HP)
Torque:
Refer to manual for exact specification
Carburetor Type:
Keihin CVK (Constant Velocity Carburetor)
Fuel Delivery:
Carbureted
Oil Type Specification:
Refer to manual for specific viscosity grade (e.g., SAE 10W-40) and API classification.
Coolant Type:
Refer to manual for specific coolant type and mixture ratio (typically ethylene glycol-based).
Length:
Refer to manual for specific measurement
Width:
Refer to manual for specific measurement
Height:
Refer to manual for specific measurement
Dry Weight:
Refer to manual for specific measurement (approx. 215 lbs / 98 kg)
Curb Weight:
Refer to manual for specific measurement
Front Tire Size:
Refer to manual for specific size (e.g., 80/100-21)
Rear Tire Size:
Refer to manual for specific size (e.g., 100/90-19)
Wheelbase:
Refer to manual for specific measurement
Engine Oil Change:
Refer to manual for recommended intervals based on operating hours or mileage.
Air Filter Cleaning:
Frequent cleaning recommended, especially in dusty conditions. Refer to manual for specific guidance.
Valve Clearance Check:
Refer to manual for recommended intervals (typically every 10-20 hours of racing).
Engine Oil:
Refer to manual for exact grade (e.g., SAE 10W-40) and API specification.
Coolant:
Refer to manual for exact type and mixture ratio.
Brake Fluid:
DOT 4 recommended (Refer to manual for confirmation).
Transmission Oil:
Refer to manual for specific type and capacity (often shared with engine oil).
Common Wear Items:
Clutch plates, piston rings, valve guides, wheel bearings, steering stem bearings, linkage bearings.
Carburetor Tuning:
Can be sensitive to altitude and temperature changes, requiring periodic jetting adjustments.
Suspension Maintenance:
Regular fork seal replacement and shock absorber service are crucial for optimal performance.
Kawasaki Legacy:
Kawasaki has a long and successful history in motocross racing, known for its high-performance off-road motorcycles.
Kx250F Introduction:
The KX250F was introduced as Kawasaki's answer to the growing popularity of four-stroke motocross bikes, quickly establishing itself as a competitive machine.
04 05 Generation:
This generation featured significant advancements, including the introduction of the four-stroke engine configuration for the KX250F, aiming to compete with established four-stroke offerings from other manufacturers.
Manufacturing Location:
Japan
