🏷️ Basic Information Identification Make: Jawa Model: 250/350 Series Sub Model: 353, 354 Motorcycle Type: Lightweight Motorcycle 👋 Introduction Market Position Positioning: A critical resource for owners and mechanics of classic Jawa motorcycles, particularly the popular 250cc and 350cc models. Essential for maintaining and restoring these historically significant machines. Competitive Analysis Competitors: This manual competes with other third-party reproduction manuals or original, often hard-to-find, factory service documentation for classic Eastern Bloc motorcycles. Its instant digital availability is a key differentiator. Key Features Features: Comprehensive coverage of all models, instant download in PDF, detailed diagrams and illustrations, step-by-step instructions, and extensive technical specifications for repair and maintenance. Diagrams Illustrations: Features numerous exploded views and diagrams crucial for visual identification of parts and understanding assembly sequences. 📋 Manual Details Coverage Areas Coverage Scope: All models and variations of Jawa 250cc and 350cc motorcycles, specifically the 353 and 354 series. Page Count Estimated Page Count: High (estimated 200+ pages based on typical workshop manual depth) Manual Type Type: Workshop Service Repair Manual Language Language: Likely English (based on product description and common market for such manuals) Format Format: PDF (Instant Download) 📖 Manual Coverage Systems Covered Engine: Complete engine disassembly, assembly, tuning, and troubleshooting for 250cc and 350cc two-stroke engines. Includes lubrication, cooling, and ignition systems. Transmission: Detailed procedures for gearbox inspection, maintenance, repair, and adjustment. Includes clutch assembly and operation. Chassis: Front fork (telescopic), rear suspension (swingarm with twin shock absorbers), frame inspection and repair, steering head bearing service. Brakes: Drum brake system maintenance, adjustment, and component replacement for both front and rear brakes. Electrical System: Wiring diagrams, lighting system service, ignition coil and points replacement, dynamo/generator (if applicable) testing and repair, horn, and switches. Fuel System: Carburetor identification, disassembly, cleaning, adjustment, and jetting. Fuel tank, fuel lines, and petcock service. Wheels Tires: Spoke wheel maintenance, tire pressure recommendations, tube replacement, and wheel bearing service. Bodywork: Fender removal and installation, seat maintenance, fuel tank removal and cleaning, and general panel alignment. Procedures Included Maintenance: Regular servicing, oil changes (for gearbox), spark plug replacement, chain adjustment, brake adjustments, and general lubrication. Troubleshooting: Systematic diagnostic procedures for common starting issues, engine misfires, transmission problems, and electrical faults. Repair: Step-by-step instructions for component replacement, overhaul, and repair of all major motorcycle systems. Overhaul: Complete engine and gearbox overhaul procedures, including piston and ring replacement, cylinder honing, crankshaft bearing replacement, and gear inspection. Adjustment: Precise instructions for clutch, throttle, and brake cable adjustments, ignition timing, and carburetor idle speed. Engine Rebuild: Includes full engine strip-down, cleaning of all internal components, replacement of wear items (piston, rings, bearings, seals), cylinder inspection and potential re-boring/honing, crankshaft alignment checks. Carburetor Rebuild: Detailed steps for disassembling, cleaning, and reassembling carburetors, including identification and replacement of jets, needles, floats, and seals. Critical for proper fuel mixture and engine operation. Ignition Timing Adjustment: Instructions on setting ignition timing using points and a feeler gauge or timing light (if specified for the model) to ensure optimal combustion and engine performance. Wheel Truing: Guidance on spoke tension adjustment and wheel alignment for maintaining wheel integrity and smooth riding. Technical Depth Depth: Comprehensive, covering from basic user maintenance to complete engine and gearbox rebuilds, suitable for both amateur and professional mechanics. Diagnostic Charts: Likely includes troubleshooting charts that correlate symptoms (e.g., engine not starting, poor acceleration) with potential causes and corrective actions. Tolerance Specifications: Provides critical measurement specifications for engine components such as piston-to-cylinder clearance, bearing clearances, and gear backlash, essential for rebuild accuracy. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable PDF (dependent on original scan quality) Compatibility: Compatible with PC & Mac, Windows (95, 98, 2000, NT, XP, Vista, 7, 8, etc.) and likely macOS systems. Print Quality Printability: Designed for printing, allowing users to create a physical copy for workshop use. Binding Type Digital Binding: N/A (Digital Format) Paper Type Digital Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, air-cooled, parallel twin (for 350cc models), single-cylinder (for 250cc models) Bore Stroke 250: Typically around 63 mm x 80 mm (check specific model variants) Bore Stroke 350: Typically around 60.5 mm x 65 mm (check specific model variants) Compression Ratio Approx: Around 7.0:1 to 8.0:1 (varies by model and tuning) Performance Horsepower 250 Approx: Around 16-20 hp (varies by model and tuning) Horsepower 350 Approx: Around 20-24 hp (varies by model and tuning) Fuel System Carburetor Type: Typically Jikov or similar; single or twin carburetors depending on the model. Specific model carburetor identification and jetting data will be in the manual. Fuel Type: Leaded or Unleaded gasoline with appropriate 2-stroke oil mix (e.g., 1:25 or 1:50, manual will specify). Lubrication Gearbox Oil Type: GL-4 or GL-5 hypoid gear oil, SAE 80W/90. Specific Jawa recommendations will be detailed. 🔧 Transmission Standard Type: 4-speed manual gearbox, foot-shifted...