🏷️ Basic Information Identification Make: Kawasaki Model: KDX125, KDX250 Years Covered: 1990, 1991 Codes Engine Type: 2-Stroke 👋 Introduction Market Position Segment: Off-road motorcycles, Enduro/Trail Competitive Analysis Competitors: Honda CR series, Yamaha YZ series, Suzuki RM series, KTM EXC series Key Features Advantages: Focus on 2-stroke performance, lightweight design, tractable power delivery for trail riding, durable construction 📋 Manual Details Coverage Areas Manual Type: Repair Manual / Workshop Manual Language: English Format: Electronic Downloadable PDF Page Count Estimated Page Count: Refer to specific model manual for exact count (typically 200-400 pages per model) 📖 Manual Coverage Systems Covered Engine Systems: Top-end overhaul, piston and rings, crankshaft and connecting rod, cylinder, carburetor, ignition system, cooling system (if applicable), lubrication system Transmission Systems: Gearbox, clutch, drive chain, sprockets Chassis Systems: Frame, suspension (front forks, rear shock), steering system, brakes (front and rear), wheels, tires Electrical Systems: Wiring diagrams, lighting, ignition components, battery, charging system Bodywork And Trim: Body panels, seat, fuel tank, fenders, exhaust system Procedures Included Maintenance Procedures: Routine service, oil changes, filter replacements, chain adjustment, spark plug service, air filter cleaning/replacement, carburetor cleaning/adjustment Repair Procedures: Engine disassembly and reassembly, clutch replacement, transmission overhaul, fork seal replacement, shock absorber servicing, brake caliper rebuild Troubleshooting: Diagnostic guides, common problem identification, solutions for starting issues, performance problems, electrical faults Technical Depth Depth: Comprehensive, covering routine maintenance to full engine rebuilds and advanced troubleshooting 📊 Manual Specifications File Format File Type: PDF Print Quality Quality: High-resolution, optimized for digital viewing and printing Binding Type Type: Digital Download (No physical binding) Paper Type Type: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Kdx125 Engine Type: Liquid-cooled, 2-stroke, single-cylinder Kdx125 Bore X Stroke: 52.0 x 51.8 mm Kdx125 Displacement: 124 cc Kdx125 Compression Ratio: 7.2:1 (typical for this era) Kdx250 Engine Type: Liquid-cooled, 2-stroke, single-cylinder Kdx250 Bore X Stroke: 70.0 x 64.0 mm Kdx250 Displacement: 249 cc Kdx250 Compression Ratio: 7.0:1 (typical for this era) Performance Kdx125 Horsepower: Approx. 25-28 HP (estimated) Kdx250 Horsepower: Approx. 35-38 HP (estimated) Fuel System Carburetor Type: Mikuni VM series (e.g., VM28 for KDX125, VM32 for KDX250, specific sizes may vary) Fuel Type: Unleaded gasoline with 2-stroke oil pre-mix (recommended ratio typically 40:1 or 50:1) Lubrication Mixing Method: Autolube system (oil injection) or pre-mix Cooling System Type: Liquid-cooled 🔧 Transmission Standard Kdx125 Gearbox: 6-speed constant mesh Kdx250 Gearbox: 6-speed constant mesh Features Clutch Type: Wet, multi-disc Drive Type: Chain drive 📐 Dimensions Exterior Kdx125 Length: Approx. 2,170 mm (85.4 in) Kdx125 Width: Approx. 800 mm (31.5 in) Kdx125 Height: Approx. 1,245 mm (49.0 in) Kdx125 Wheelbase: Approx. 1,430 mm (56.3 in) Kdx250 Length: Approx. 2,225 mm (87.6 in) Kdx250 Width: Approx. 820 mm (32.3 in) Kdx250 Height: Approx. 1,265 mm (49.8 in) Kdx250 Wheelbase: Approx. 1,455 mm (57.3 in) Weights Kdx125 Dry Weight: Approx. 107 kg (236 lbs) Kdx250 Dry Weight: Approx. 114 kg (251 lbs) 🛡️ Safety Features Ratings Type: N/A (Motorcycles are not typically rated by consumer safety organizations like NHTSA or IIHS) Active Features Braking System: Hydraulic disc brakes front and rear Passive Features Lighting: Headlight, taillight, brake light, turn signals (market dependent) 💡 Technology Features Infotainment Features: N/A (Analog instrumentation: speedometer, odometer, neutral indicator, high beam indicator) Driver Assistance Features: N/A 🔧 Maintenance Service Intervals Kdx125 Oil Change: Refer to manual; typically every 15-25 hours of riding or as per mileage equivalents. Kdx125 Spark Plug Service: Refer to manual; typically every 20-30 hours of riding. Kdx125 Chain Maintenance: Lubricate and adjust every 300-500 km (180-300 miles) or as needed. Kdx250 Oil Change: Refer to manual; typically every 15-25 hours of riding or as per mileage equivalents. Kdx250 Spark Plug Service: Refer to manual; typically every 20-30 hours of riding. Kdx250 Chain Maintenance: Lubricate and adjust every 300-500 km (180-300 miles) or as needed. Fluid Specifications Engine Oil Type: 2-stroke synthetic or mineral oil (specific grades like SAE 10W-30 or 10W-40 for transmission/clutch if separate) Coolant Type: Ethylene glycol-based coolant with distilled water (typically 50/50 mix) Fork Oil Type: Specific fork oil (e.g., SAE 5W or 10W), check manual for precise grade and quantity Known Issues Common Problems: Carburetor tuning sensitivity, clutch wear, occasional crank seal leaks, exhaust port carbon buildup 📚 Vehicle History Brand Heritage Kawasaki Legacy: Kawasaki has a long history in off-road motorcycle racing and trail riding, known for their powerful 2-stroke engines and durable designs. Model Evolution Kdx Lineage: The KDX line has been a staple in Kawasaki's off-road lineup, evolving over decades with technological advancements while retaining its core off-road capability and 2-stroke character. Production Era: The KDX125 and KDX250 models were significant in the late 1980s and early 1990s, catering to riders seeking accessible yet capable off-road performance. 🏆 Awards & Recognition Recognitions Type: N/A (Specific awards for these models are not commonly documented in general automotive databases.)