Category:
Competition Motocross Motorcycle
Target User:
Motocross racers and off-road enthusiasts seeking high performance and reliable maintenance information.
Key Competitors:
Yamaha YZ250F, Honda CRF250R, Suzuki RM-Z250, KTM 250 SX-F.
Performance:
High-revving 250cc four-stroke engine, advanced suspension (KYB SSS forks), and lightweight chassis.
Technology:
Fuel Injection (EFI) for improved throttle response and power delivery, DFI coupler system for engine mapping.
Engine:
Complete engine overhaul, disassembly, inspection, assembly, tuning, and troubleshooting.
Fuel System:
Fuel injection system (EFI), throttle body, fuel pump, injectors, fuel tank, and lines.
Ignition System:
Ignition system components, timing, troubleshooting.
Cooling System:
Radiator, hoses, coolant, water pump, thermostat.
Transmission:
Gearbox, clutch assembly (friction plates, steel plates, springs), shift drum, shift forks, maintenance and repair.
Suspension Front:
Front fork (KYB SSS - Speed Sensitive System), disassembly, assembly, oil types, levels, shim stacks, and adjustments.
Suspension Rear:
Rear shock absorber (KYB), linkage system, disassembly, rebuild, oil, gas pressure, and adjustments.
Brakes:
Front and rear brake systems, hydraulic lines, master cylinders, calipers, brake pads, rotor specifications, bleeding procedures.
Wheels Tires:
Wheel bearings, spoke tension, tire pressure, rim specifications.
Electrical System:
Wiring diagrams, battery, charging system, lighting, starter motor, ECU, sensors.
Frame Bodywork:
Frame, subframe, body panels, seat, handlebars, footpegs, mounting points.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain adjustment, lubrication, spark plug replacement.
Troubleshooting:
Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides.
Repair:
Step-by-step repair instructions for all major and minor components.
Disassembly Assembly:
Detailed procedures for complete disassembly and reassembly of the motorcycle and its components.
Tuning Adjustments:
Engine tuning, suspension adjustments, carburetor (if applicable, though this is EFI) adjustments.
Depth:
Comprehensive, covering basic maintenance to complete engine and chassis rebuilds.
Diagnostics:
Includes diagnostic procedures and information for EFI system.
Torque Specifications:
Detailed torque specifications for all critical fasteners.
Clearances Tolerances:
Specific clearances and tolerances for engine parts, bearings, and other critical components.
Type:
Liquid-cooled, four-stroke, DOHC, four-valve single-cylinder
Bore X Stroke:
77.0 x 53.5 mm
Compression Ratio:
12.0:1 (typical for this generation)
Horsepower:
Refer to manual for exact figures, typically in the 38-42 HP range at peak RPM.
Torque:
Refer to manual for exact figures, typically in the 20-22 lb-ft range at peak torque.
Type:
Digital Fuel Injection (DFI) with 43mm Keihin throttle body
Fuel Type:
Unleaded gasoline, minimum octane rating 91
System:
Forced lubrication (wet sump)
Oil Capacity:
Refer to manual for exact capacity, typically around 0.7 - 0.8 liters.
Oil Type:
Refer to manual for specific viscosity and API rating, typically JASO MA certified 10W-40 or 10W-50 motorcycle oil.
Length:
Refer to manual for exact dimensions, approximately 2140 mm (84.3 in).
Width:
Refer to manual for exact dimensions, approximately 800 mm (31.5 in).
Height:
Refer to manual for exact dimensions, approximately 1270 mm (50.0 in).
Wheelbase:
Refer to manual for exact wheelbase, approximately 1475 mm (58.1 in).
Curb Weight:
Refer to manual for exact weight, approximately 103 kg (227.1 lbs) - dry weight often quoted, curb weight includes fluids.
Fuel Capacity:
Refer to manual for exact capacity, typically 8.0 liters (2.1 US gal).
Oil Change:
Refer to manual; typically every 10-15 hours of riding or as per manufacturer recommendation.
Air Filter Cleaning:
Refer to manual; recommended before every ride or after dusty conditions.
Spark Plug Inspection:
Refer to manual; typically every 15-20 hours of riding.
Valve Clearance Check:
Refer to manual; critical for engine performance and longevity, often 20-30 hours for racing use.
Engine Oil:
Kawasaki recommends specific motorcycle oil meeting JASO MA MA2 standards. Refer to manual for exact viscosity (e.g., 10W-40, 10W-50).
Coolant:
Mixture of distilled water and a high-quality antifreeze/coolant. Refer to manual for specific ratio and type (e.g., silicate-free).
Fork Oil:
Specific suspension fluid viscosity and volume detailed in manual (e.g., Showa SS-01 or similar for KYB SSS forks).
Shock Oil:
Specific suspension fluid viscosity and pressure for the rear shock absorber detailed in manual.
Common Wear Items:
Clutch plates, piston rings, valve stem seals, wheel bearings, chain and sprockets are common wear items in high-performance motocross bikes.
Efi System Considerations:
While reliable, proper maintenance of the fuel filter and injector is crucial for optimal performance.
