Vehicle Segment:
High-performance motocross competition bike.
Target Audience:
Motocross racers, off-road enthusiasts, and mechanics specializing in performance dirt bikes.
Key Competitors 2007:
Yamaha YZ250F, Honda CRF250R, Suzuki RM-Z250, KTM 250 SX-F.
Performance Focus:
Engineered for peak performance on the motocross track, emphasizing power delivery and handling.
Advanced Technology:
Features like the 'D-Section' piston and refined chassis geometry for the 2007 model year.
Engine Assembly:
Detailed exploded views of all engine components, including cylinder, piston, crankshaft, valve train, and cooling system.
Fuel System:
Carburetor components, fuel tank, fuel line routing, and related fittings.
Drivetrain:
Clutch assembly, transmission gears, shift drum and forks, final drive sprocket and chain components.
Chassis Frame:
Frame structure, sub-frame, engine mounts, and associated hardware.
Suspension Front:
Front fork components, internal valving, springs, seals, and outer tubes (specific to T7F model features).
Suspension Rear:
Rear shock absorber components, linkage system, swingarm, bearings, and associated hardware.
Brakes Front:
Brake caliper assembly, master cylinder, brake lever, brake pads, and disc rotor part identification.
Brakes Rear:
Rear brake caliper, master cylinder, brake pedal, brake pads, and disc rotor part identification.
Wheels Tires:
Front and rear wheel hubs, spokes, rims, bearings, tire specifications (though not detailed sizing, identifies wheel components).
Electrical System:
Ignition system components, stator, CDI unit, wiring harness routing (visual identification of connectors and components), lighting.
Controls Operation:
Throttle assembly, clutch lever mechanism, shifter mechanism, and handlebar components.
Bodywork Plastics:
Radiator shrouds, side panels, front fender, rear fender, seat, fuel tank cover, and associated fasteners.
Disassembly Guidance:
Provides visual guidance for component removal through exploded diagrams, aiding in systematic disassembly.
Assembly Guidance:
Facilitates correct reassembly by illustrating component placement and order.
Part Identification:
Crucial for identifying correct replacement parts using OEM part numbers.
Fastener Identification:
Illustrates specific fasteners (bolts, nuts, washers) required for each assembly.
Depth Level:
Comprehensive parts catalog detailing all replaceable components.
Diagnostic Support:
Does not provide diagnostic troubleshooting steps or repair procedures, but is essential for part identification during diagnosis.
Engine Type:
Liquid-cooled, four-stroke, DOHC, four-valve single cylinder.
Displacement:
249 cc (15.2 cu. in.)
Bore X Stroke:
76.0 x 55.0 mm (3.0 x 2.2 in.)
Compression Ratio:
12.5:1
Horsepower Estimated:
Approx. 39-40 HP (at crankshaft, exact figure not in parts manual)
Torque Estimated:
Approx. 20-21 lb-ft (at crankshaft, exact figure not in parts manual)
Carburetor:
Keihin FCR37 (Flat CR Special) with acceleration pump.
Fuel Type:
Unleaded gasoline
Coolant Type:
Proprietary Kawasaki coolant or equivalent ethylene glycol-based coolant (refer to service manual for exact mix ratio and part numbers).
Overall Length:
Approx. 2140 mm (84.3 in.)
Overall Width:
Approx. 800 mm (31.5 in.)
Overall Height:
Approx. 1250 mm (49.2 in.)
Dry Weight:
Approx. 93.5 kg (206.1 lbs)
Curb Weight Estimated:
Approx. 103.5 kg (228.2 lbs) (with all fluids)
Front Tire Size:
80/100-21 51M (Refer to manual for specific part number)
Rear Tire Size:
100/90-19 57M (Refer to manual for specific part number)
Wheelbase:
Approx. 1475 mm (58.1 in.)
Infotainment System:
N/A (Pure competition motocross bike, no rider comfort or infotainment features).
Assistance Features:
N/A (No electronic rider aids, ABS, or traction control).
Connectivity Features:
N/A
Performance Enhancements:
D-section piston design (introduced in prior years) for increased rigidity and improved heat dissipation, contributing to sustained power output.
Oil Change Interval:
Refer to the official Kawasaki Service Manual for precise intervals based on operating hours or mileage. Typically every few rides for competition use.
Air Filter Cleaning:
Frequent cleaning is essential, especially in dusty conditions. Refer to service manual for cleaning/oiling procedure.
Spark Plug Check:
Inspect and clean/replace as needed, particularly before major events. Refer to service manual for gap specification and part number.
Valve Clearance Check:
Critical for engine performance. Intervals typically measured in operating hours. Refer to service manual for procedure and specifications.
Engine Oil Type:
SAE 10W-40 API SG or higher, JASO MA certified (refer to manual for specific Kawasaki recommendations and part numbers).
Engine Oil Capacity:
Approx. 0.70 L (0.74 US qt) for regular oil change, 0.80 L (0.85 US qt) after filter replacement (refer to manual for precise amounts).
Transmission Oil Type:
Use the same type as engine oil unless specified otherwise. Check manual for dedicated transmission oil if applicable.
Brake Fluid Type:
DOT 4 (refer to manual for exact specification and part number for brake fluid).
Common Wear Items:
Clutch plates, brake pads, sprockets, chain, air filter, piston rings are common wear items in high-performance motocross applications.
Suspension Maintenance:
Regular servicing of front forks and rear shock is crucial for optimal performance and longevity, including seal replacement and oil changes.
Kawasaki Offroad Legacy:
Kawasaki has a long and successful history in motocross and off-road racing, with the KX line being a cornerstone of their performance offerings.
Kx250F Development:
The KX250F underwent significant development throughout the 2000s, moving from carbureted engines to fuel injection and evolving chassis designs to remain competitive.
2007 Updates:
The 2007 model featured key updates including revised suspension settings, a lighter and more rigid frame, and internal engine refinements to improve power delivery.
Production Period:
The KX250F model line has been in continuous production since its introduction.
