Segment:
Motocross Competition Bike
Target Audience:
Motocross racers and performance-oriented off-road riders
Competitors 2006:
Honda CRF250R, Yamaha YZ250F, Suzuki RM-Z250
Engine Type:
Liquid-cooled, Four-stroke, DOHC, four-valve single
Carburetion:
Keihin FCR37 (Flat CR) with acceleration pump
Completeness:
Complete coverage, mirroring dealer workshop manuals
Usability:
Simple to use, packed with essential information
Engine Top End:
Included (Piston, Rings, Cylinder Head, Valves, Camshafts)
Engine Right Side:
Included (Clutch, Gearbox Components)
Engine Lubrication System:
Included (Oil Pump, Passages, Oil Cooler if applicable)
Crankshaft Transmission:
Included (Crankshaft Assembly, Gearbox Internals, Shift Drum)
Fuel System:
Included (Carburetor Assembly, Fuel Lines, Fuel Pump if applicable)
Cooling System:
Included (Radiator, Hoses, Water Pump)
Electrical System:
Included (Wiring Diagrams, Ignition System, Lighting, CDI Unit)
Suspension:
Included (Front Forks, Rear Shock Absorber, Linkages)
Brakes:
Included (Front and Rear Brake Systems, Calipers, Master Cylinders, Lines)
Wheels Tires:
Included (Wheel Bearings, Rim Specifications, Tire Mounting)
Final Drive:
Included (Chain Adjustment, Sprockets)
Steering:
Included (Handlebar, Steering Stem Bearings)
Frame:
Included (Chassis Inspection, Component Fasteners)
Appendix:
Included (Torque Settings, Fluid Capacities, Troubleshooting Guides)
General Information:
Included (Vehicle Identification, Safety Precautions)
Periodic Maintenance:
Included (Service Intervals, Checks, Adjustments)
Engine Removal Installation:
Included (Step-by-step procedures for engine removal and reinstallation)
Troubleshooting:
Included (Diagnosis of common problems and their solutions)
Rebuilds:
Included (Detailed procedures for engine and component rebuilds)
Diagnostics:
Included (System checks, fault finding)
Depth:
Comprehensive (From basic maintenance to complete engine rebuilds and electrical diagnostics)
Diagrams:
Step-by-step diagrams included for all workshop procedures
Engine Type:
Four-stroke, Single-cylinder, DOHC, 4-valve
Bore X Stroke:
72.0 x 61.1 mm
Compression Ratio:
12.5:1
Cooling System:
Liquid-cooled
Horsepower:
Approx. 40-42 HP (Manufacturer specific, not explicitly stated but typical for class)
Torque:
Not explicitly stated, but designed for high RPM power delivery
Carburetor:
Keihin FCR37 with Accelerator Pump
Fuel Type:
Unleaded gasoline
Safety Features Note:
As a competition off-road vehicle, standard automotive safety ratings do not apply. Focus is on rider protection and machine control.
Brakes:
Hydraulic disc brakes (front and rear) for superior stopping power.
Suspension:
Advanced suspension systems (e.g., Showa SFF forks) designed for stability and control over rough terrain.
Frame Construction:
Strong perimeter frame for chassis rigidity and rider feedback.
Oil Change Interval:
Refer to manual; typically every 10-15 hours of riding or annually, whichever comes first.
Air Filter Cleaning:
Frequent checks and cleaning/replacement recommended, especially in dusty conditions.
Spark Plug Check:
Refer to manual for specific mileage or hours.
Engine Oil Type:
SAE 10W-40 API SG or higher, JASO MA standard motorcycle oil. Manual will specify exact grade and capacity.
Coolant Type:
High-quality permanent type anti-freeze coolant, mixed with distilled water (50:50 ratio). Manual will specify exact type and capacity.
Brake Fluid Type:
DOT 4 hydraulic brake fluid. Manual will specify exact type.
Common Wear Items:
Clutch plates, piston rings, valve guides, wheel bearings, suspension seals are common wear items in high-performance motocross bikes.
Carburetor Tuning:
Tuning the Keihin FCR carburetor can be sensitive to altitude and temperature changes, requiring periodic adjustment.
Suspension Maintenance:
Regular fork seal and oil changes, and shock absorber service are crucial for optimal performance.
Kawasaki Motocross Legacy:
Kawasaki has a long and successful history in motocross racing, known for performance-oriented and innovative designs.
Kx250F Introduction:
The KX250F was introduced to compete in the highly popular four-stroke motocross segment, evolving from Kawasaki's two-stroke lineage.
Manufacturing Location:
Typically Japan