Category:
Performance Off-Road Motorcycle - Motocross
Target Audience:
Motocross racers, enthusiasts, mechanics, and motorcycle repair shops.
Key Competitors:
Yamaha YZ250F, Honda CR250R, Suzuki RM250 (2-stroke competitor, but relevant in the class), KTM 250 SX.
Manual Value Proposition:
Provides in-depth knowledge to maintain peak performance, diagnose and resolve issues efficiently, and perform complex repairs for the KX250F, saving time and money.
Vehicle Focus:
Covers a significant developmental period of the KX250F, including the transition to 4-stroke technology in this segment.
Primary Coverage:
Workshop Repair and Maintenance
Secondary Coverage:
Troubleshooting, Diagnostics, Component Identification
Estimated Page Count:
Comprehensive (specific number not provided in product info, typically 300-600+ pages for this range)
Type:
Workshop Manual / Service Manual / Repair Manual
Language:
English (standard for most workshop manuals of this era)
Format:
Likely Printed or Digital (PDF) - assuming digital for modern sales.
Engine:
Complete engine overhaul, including top-end (cylinder, piston, rings, valves), bottom-end (crankshaft, connecting rod, bearings), cooling system, lubrication system, and engine management.
Fuel System:
Carburetor service, tuning, troubleshooting, fuel pump (if applicable), fuel lines, and filter replacement.
Transmission:
Clutch assembly, gear selection mechanism, transmission gear inspection, replacement, and lubrication.
Suspension:
Front fork service (oil changes, seal replacement, damper adjustments), rear shock absorber service, linkages, and bearings.
Brakes:
Front and rear brake caliper service, master cylinder overhaul, brake pad replacement, brake fluid bleeding, brake line inspection, and rotor maintenance.
Electrical System:
Ignition system components (spark plug, coil, CDI unit), lighting (if applicable for street-legal variants or off-road lighting kits), wiring diagrams, battery maintenance, and charging system (stator, rectifier/regulator).
Chassis And Frame:
Frame inspection, swingarm, steering head bearings, wheel bearings, and general chassis component maintenance.
Cooling System:
Radiator service, coolant checks, hose replacement, and water pump inspection.
Exhaust System:
Exhaust pipe inspection, muffler maintenance, and gasket replacement.
Maintenance:
Scheduled maintenance tasks, fluid changes (oil, coolant, brake fluid), filter replacements (air, oil, fuel), chain adjustment, cable lubrication, and general inspection checklists.
Troubleshooting:
Systematic diagnostic procedures for common problems, including starting issues, poor performance, overheating, and electrical faults.
Repair:
Step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation for virtually all parts of the motorcycle.
Rebuilds:
Detailed instructions for complete engine rebuilds, carburetor overhauls, and suspension unit servicing.
Adjustments:
Carburetor jetting, valve clearance adjustment, suspension sag settings, and cable adjustments.
Depth:
Comprehensive from basic owner-level maintenance to advanced dealer-level diagnostics and complete component overhauls.
Diagnostic Capabilities:
Includes symptom-based troubleshooting guides, test procedures, and specifications for diagnosing faults.
Specifications:
Provides essential technical data, torque values, clearances, fluid capacities, and service limits.
Type:
4-stroke, Liquid-Cooled, Single-Cylinder (primarily, though early models might have had 2-stroke variants, the 'F' designation strongly indicates 4-stroke for this era of KX models).
Displacement Cc:
Approximately 249cc (specific to year, but consistently in this range).
Bore X Stroke:
Varies by year, e.g., 72.0 x 61.1 mm for some models.
Compression Ratio:
Varies by year, typically in the range of 11.0:1 to 13.5:1.
Valve Train:
DOHC (Double Overhead Camshaft), 4 Valves per cylinder.
Horsepower Hp:
Estimated 35-45 HP at peak RPM, depending on year and specific tuning.
Torque Lb-Ft:
Estimated 20-25 lb-ft at peak torque, depending on year.
Carburetor Type:
Keihin or Mikuni flat-slide carburetor, e.g., Keihin FCR39 (specific model varies by year).
Fuel Type:
Unleaded Gasoline, Octane Rating 91 or higher recommended.
Oil Type:
SAE 10W-40, API SG or higher, JASO MA certified motorcycle oil.
Oil Capacity Liters:
Approximately 0.7 - 1.0 Liters (dry fill), varies by year. Manual will specify exact capacity.
Length Mm:
Varies by year, generally around 2150-2180 mm.
Width Mm:
Varies by year, generally around 800-820 mm.
Height Mm:
Varies by year, generally around 1250-1280 mm.
Wheelbase Mm:
Varies by year, typically around 1470-1485 mm.
Dry Weight Kg:
Approximately 95-100 kg, varies significantly by year and model updates.
Wet Weight Kg:
Not typically specified in standard specs, but higher than dry weight due to fluids.
Fuel Capacity Liters:
Approximately 7.0 - 7.5 Liters.
Engine Oil Change:
Every 5-10 hours of riding or annually, whichever comes first (recommendation based on typical motocross usage, manual provides precise intervals).
Air Filter Cleaning:
After every few rides or as needed based on conditions. Critical for engine longevity.
Spark Plug Inspection:
Every 10-20 hours of riding.
Chain Lubrication Adjustment:
Regularly, every ride or every few hours, depending on conditions and mileage.
Suspension Service:
Fork oil change every 20-30 hours, full suspension service annually or as needed.
Coolant Type:
Permanent type anti-freeze coolant (Ethylene Glycol base), 50/50 mix with distilled water.
Brake Fluid Type:
DOT 4 Hydraulic Brake Fluid.
Fork Oil Type:
Specific fork oil viscosity (e.g., Showa SS-8, KYB or similar) – manual will specify exact type and quantity per leg.
Common Wear Items:
Clutch plates, piston rings, valve seats, wheel bearings, steering head bearings, chain and sprockets.
Potential Problems:
Carburetor jetting sensitivity to altitude/temperature, cam chain tensioner wear (on 4-stroke models), early model 4-stroke engine reliability can vary. Manual helps diagnose and mitigate.
Kawasaki Legacy:
Kawasaki has a long and storied history in motocross and off-road racing, known for powerful and competitive machines.
Kx250F Transition:
This period (1994-2007) covers significant evolution for the KX250F, including the critical shift from 2-stroke technology to 4-stroke in the 250cc class, which began in earnest for Kawasaki around the turn of the millennium. The manual would cover models during this transition and the subsequent development of the 4-stroke platform.
Manufacturing Location:
Japan (Primary manufacturing for Kawasaki motorcycles)
Market Impact:
The KX250F has been a consistently strong contender in the highly competitive 250cc motocross class throughout its production run, with many race wins and championships.