🏷️ Basic Information Identification Make: Kawasaki Model: KX250 Generation Years Covered: 2003, 2004, 2005, 2006, 2007 Codes Engine Type: 2-Stroke 👋 Introduction Market Position Target Audience: Enthusiasts, DIY mechanics, professional technicians working on Kawasaki KX125 and KX250 motocross motorcycles Competitive Analysis Benefit: Provides essential information for maintenance and repair, reducing reliance on costly dealer services or incomplete online resources. Key Features Accessibility: Instant download after payment, accessible on various devices like smartphones, tablets, and computers. Durability: Lifetime protection policy against loss or damage. Environmental: Eco-friendly digital format, saving paper resources. 📋 Manual Details Coverage Areas Manual Type: Repair Manual / Workshop Manual Language: English Format: PDF Download Content Scope: Comprehensive Repair, Maintenance, Troubleshooting, and Parts Information 📖 Manual Coverage Systems Covered Engine: Engine Removal and Installation, Engine Specifications, Lubrication and Cooling System, Intake & Exhaust, Fuel System Drivetrain: Transmission, Drive Chain & Sprockets Chassis: Steering System, Shocks, Body Work Electrical: Electrical System Procedures Included Maintenance: Routine Maintenance, Scheduled Servicing Repair: Component Repair and Rebuild Procedures Troubleshooting: Advanced Troubleshooting Guides, Diagnostic Procedures Technical Depth Depth: Detailed repair procedures, torque specifications, clearances, and diagnostic flowcharts 📊 Manual Specifications File Format Type: PDF Searchability: Searchable text for quick information retrieval Print Quality Quality: High-resolution for clear diagrams and text Binding Type Type: Digital Download (No physical binding) Paper Type Type: Not Applicable (Digital) ⚙️ Engine Specifications Primary Engine Type: Liquid-cooled, 2-stroke single cylinder Kx125 Displacement: 124 cc Kx250 Displacement: 249 cc Kx125 Bore X Stroke: 54.0 x 54.5 mm Kx250 Bore X Stroke: 66.4 x 72.0 mm Performance Kx125 Approx Hp: ~35-40 hp (at crank, dependent on tuning) Kx250 Approx Hp: ~45-50 hp (at crank, dependent on tuning) Fuel System Carburetor Kx125: Keihin PWK38 Carburetor Kx250: Keihin PWK39 Fuel Type: Unleaded Gasoline (minimum 91 octane recommended) with 2-stroke oil mix Oil Mix Ratio: 50:1 (Kawasaki recommends their specific 2-stroke oil) 🔧 Transmission Standard Type: 6-speed constant mesh Features Clutch: Wet multi-disc, cable operated Final Drive: O-ring sealed chain 📐 Dimensions Exterior Kx125 Length: Approx. 85.8 in (2179 mm) Kx250 Length: Approx. 86.0 in (2185 mm) Kx125 Width: Approx. 31.7 in (805 mm) Kx250 Width: Approx. 31.7 in (805 mm) Kx125 Height: Approx. 48.6 in (1235 mm) Kx250 Height: Approx. 48.6 in (1235 mm) Weights Kx125 Dry Weight: Approx. 205.1 lb (93 kg) Kx250 Dry Weight: Approx. 222.7 lb (101 kg) Fuel Tank Capacity: Approx. 2.1 gal (8.0 L) Kx125 Wheelbase: Approx. 57.7 in (1465 mm) Kx250 Wheelbase: Approx. 57.7 in (1465 mm) 🛡️ Safety Features Ratings Type: Off-road motorcycles do not typically receive NHTSA or Euro NCAP safety ratings. Active Features Braking Front: Hydraulic disc brake Braking Rear: Hydraulic disc brake Passive Features Frame: Perimeter frame (steel) 💡 Technology Features Infotainment Features: Not applicable for competition motocross motorcycles. Driver Assistance Features: Not applicable for competition motocross motorcycles. 🔧 Maintenance Service Intervals Air Filter Cleaning: Check and clean after every few rides or as needed based on conditions. Spark Plug Inspection: Inspect and clean/replace every 10-15 hours of use or as per manual recommendations. Chain Lubrication Adjustment: Lubricate and check tension before every ride. Top End Rebuild: Recommended every 30-50 hours of heavy use, depending on riding style and maintenance. Fluid Specifications Engine Oil: Kawasaki KART 2-Stroke Oil or equivalent (JASO FD Certified) Transmission Oil: SAE 10W-40 API SG or higher, KAWASAKI GEAR OIL (part no. 92140-1052) or equivalent Coolant: High-quality ethylene glycol based antifreeze mixed with distilled water (50/50 ratio) Known Issues Kx125 Power Band: Known for a potent but narrow powerband, requiring precise clutch and gear work. Kx250 Power Band: Offers a broader, more tractable power delivery than the 125, but still requires attention to jetting and engine condition. Suspension Setup: Proper suspension tuning is crucial for optimal performance and rider comfort on both models. Clutch Wear: Clutch plates can wear relatively quickly with aggressive riding; regular inspection and replacement are advised. 📚 Vehicle History Brand Heritage Manufacturer: Kawasaki Heavy Industries Motorcycle & Engine Company Model Evolution Kx Line: The KX line has a long-standing reputation in motocross racing, evolving significantly throughout the years with advancements in engine technology, suspension, and chassis design. Kx125 2003: The 2003 model saw significant revisions, often including a revised cylinder design, reed valve system, and chassis geometry for improved power delivery and handling. Kx250 2003: The 2003 KX250 also received updates, focusing on powerband refinement, suspension performance, and chassis rigidity, continuing Kawasaki's push in the 250cc motocross class. Production Segment: Motocross Competition Motorcycle 🏆 Awards & Recognition Recognitions Racing Success: The KX line has a strong history of success in professional motocross and supercross racing championships. Ratings Editorial Reviews: Period reviews from motorcycle publications of the era generally praised the KX models for their potent engines, capable suspension, and competitive chassis.