JAWA 250 350 353 354 Service Repair Manual

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Art.-Nr: 135215

Stichworte: 250 350 353 354 Jawa Motorcycle Motorcycles

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Beschreibung

This manual covers the Jawa 250/350 Series motorcycles, specifically models 353 and 354, produced primarily from the mid-1950s through the 1960s. Jawa motorcycles, originating from the Czech Republic, are recognized for their robust and practical engineering. The 353 and 354 models represent a significant part of Jawa's heritage, offering reliable performance for enthusiasts and everyday use during their era. These models typically feature two-stroke, air-cooled twin-cylinder engines with displacements of approximately 250cc and 350cc respectively, known for their distinctive sound and straightforward mechanics. This comprehensive workshop service repair manual provides detailed information for all major repair topics, covering every aspect of the Jawa 353 and 354 series. It includes in-depth guidance on engine overhaul, clutch and transmission systems, electrical and ignition diagnostics, chassis components, and bodywork. The manual details scheduled maintenance, troubleshooting common issues such as carburetor tuning and ignition point adjustments, and complete repair procedures for all mechanical and electrical systems. With professional-level detail, high-quality diagrams, and essential technical specifications including measurements and torque values, this manual is an indispensable resource for owners, home mechanics, and professional technicians seeking to maintain and repair these classic Jawa motorcycles.

🏷️ Basic Information

Identification

Make:

Model:

250/350 Series (specifically 353 & 354)

Product Type:

Service Repair Workshop Manual

👋 Introduction

Market Position

Target Audience:

Enthusiasts, home mechanics, and professional workshops undertaking service, maintenance, and repair of Jawa 250 and 350cc motorcycles from the 353 and 354 series.

Competitive Analysis

Value Proposition:

Offers professional-grade information in an accessible digital format, enabling users to perform repairs themselves, saving on labor costs. High-quality visuals enhance understanding and accuracy.

Key Features

Delivery:

Instant download for immediate access to repair information.

Ease Of Use:

Easy to read PDF format, searchable content, compatible across multiple operating systems.

📋 Manual Details

Coverage Areas

Coverage:

All major repair topics A-Z, all models within the 353 and 354 series.

Page Count

Estimated Page Count:

Detailed page count not specified, but described as 'full & complete' with 'great detail' and 'lots of high quality pictures & diagrams', suggesting a substantial volume typical of professional workshop manuals.

Manual Type

Type:

Workshop Service Repair Manual

Language

Language:

English (implied by description and target market for sale)

Format

Format:

PDF (Portable Document Format)

📖 Manual Coverage

Systems Covered

Engine And Drivetrain:

Engine overhaul, clutch operation and repair, transmission systems, cooling (if applicable for specific models, though typically air-cooled for this era), fuel and exhaust systems.

Electrical And Ignition:

Ignition system diagnosis and repair, complete electrical system troubleshooting, wiring diagrams, lighting, charging system.

Chassis And Body:

Brakes and brake assembly, wheels and tires, steering and suspension components, frame structure, bodywork repair and maintenance.

Fuel System Detail:

Carburetor tuning, jetting information, fuel tank cleaning and repair, fuel tap service.

Exhaust System Detail:

Inspection and potential repair of exhaust pipes, mufflers, and mounting hardware.

Electrical System Detail:

Wiring diagrams for all circuits, ignition timing adjustment, stator and generator testing, regulator/rectifier (if applicable) diagnosis, battery maintenance.

Frame And Bodywork Detail:

Frame inspection for cracks or damage, body panel alignment and repair, seat maintenance, fender mounting.

Procedures Included

Maintenance:

Scheduled maintenance, lubrication, fluid checks and changes, filter replacements, general servicing.

Diagnostics And Troubleshooting:

Fault finding, diagnostic procedures for common and uncommon issues, troubleshooting guides.

Repair And Overhaul:

Complete repair and overhaul procedures for all major mechanical and electrical components, including engine rebuilds, transmission servicing, brake system repairs, etc.

Engine Rebuild:

Includes full engine disassembly, inspection of pistons, rings, cylinders, crankshaft, bearings, seals, and reassembly instructions with torque specifications.

Transmission Overhaul:

Detailed steps for transmission disassembly, gear inspection, shaft bearing replacement, and reassembly.

Suspension Service:

Procedures for servicing front forks (oil changes, seal replacement) and rear shock absorbers (if applicable, or swingarm bearing service).

Wheel And Tire Service:

Tire changing, tube replacement, wheel balancing, spoke tensioning, hub bearing service.

Brake System Service:

Drum brake shoe inspection, adjustment, replacement, and brake rod/cable maintenance.

Steering Head Service:

Adjustment and replacement of steering head bearings.

Technical Depth

Depth:

Comprehensive, professional-level detail suitable for mechanics, covering everything from basic adjustments to full component overhauls, supported by high-quality visuals.

Diagnostic Tools:

While not specifying included tools, professional manuals detail the use of standard mechanic's tools, feeler gauges, multimeter for electrical testing, and potentially compression testers.

Torque Specifications:

Crucial torque values for critical fasteners (e.g., cylinder head nuts, crankshaft nuts, wheel nuts) are expected to be included for proper assembly.

Measurements And Tolerances:

Detailed specifications for critical component dimensions, clearances, and wear tolerances (e.g., piston-to-cylinder bore clearance, ring gap).

Special Tools:

May reference specific Jawa or generic automotive tools required for certain procedures, though not explicitly listed in the product description.

📊 Manual Specifications

File Format

Compatibility:

Compatible with all major operating systems including Windows (95, 98, 2000, Me, Xp, Vista, 7, etc.) and macOS (PC & MAC Compatible).

Print Quality

Image Quality:

High quality pictures & diagrams

Binding Type

Binding:

Digital (PDF format, no physical binding)

Paper Type

Paper Type:

N/A (Digital format)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Two-stroke, air-cooled twin-cylinder (typical for Jawa 250/350 series, specific configurations may vary slightly by model year/designation within 353/354).

Performance

Displacement:

Approximately 250cc and 350cc (as indicated by model designations).

Power And Torque:

Specific figures vary by model year and configuration (e.g., single exhaust vs. dual exhaust, porting), but generally in the range of 15-25 HP for 250cc models and 20-30 HP for 350cc models.

Fuel System

Carburetion:

Typically uses one or two Amal or Jikov carburetors, depending on engine configuration (single or twin exhaust).

Fuel Type:

Unleaded gasoline mixed with two-stroke engine oil (pre-mix).

🔧 Transmission

Standard

Type:

Constant mesh, sequential gearbox.

Number Of Gears:

Typically 4-speed or 5-speed depending on the specific model and year within the 353/354 series.

Optional

Clutch Type:

Wet multi-plate clutch, operated by cable.

Features

Final Drive:

Chain drive.

📐 Dimensions

Exterior

Wheelbase:

Varies by model, typically around 1350-1400 mm.

Weights

Dry Weight:

Approximately 140-160 kg, depending on the specific 250cc or 350cc variant.

🛡️ Safety Features

Active Features

Braking System:

Drum brakes (front and rear), typically 180mm or 200mm diameter.

Passive Features

Lighting:

Headlight, taillight, brake light, turn signals (depending on market specification and year).

💡 Technology Features

Infotainment

System:

N/A (Basic motorcycle technology of its era, no infotainment systems).

Driver Assistance

Features:

N/A (No electronic driver assistance systems).

Connectivity

Features:

N/A (No electronic connectivity features).

🔧 Maintenance

Service Intervals

Oil Change:

Gearbox oil change typically every 5,000 - 10,000 km. Chain lubrication required frequently.

Spark Plug:

Spark plug inspection/replacement at approximately 3,000 - 5,000 km intervals.

Fluid Specifications

Gearbox Oil:

SAE 30 or SAE 80W-90 gear oil (specific viscosity recommended in manual, often a GL-3 rated gear oil).

Fuel Oil Mix:

Typically a 1:25 or 1:33 ratio of two-stroke oil to gasoline, depending on the oil quality and manufacturer recommendation (e.g., 100ml oil per 4 liters of fuel for 1:25).

Known Issues

Carburetor Tuning:

Carburetors (Jikov/Amal) can require frequent adjustment due to wear or environmental factors, affecting idle stability and fuel mixture.

Ignition Points:

Contact breaker points in the ignition system require regular inspection and adjustment for proper timing and spark quality.

Clutch Slippage:

Clutch can wear over time, leading to slippage if not properly maintained or adjusted.

Electrical Connections:

Vintage wiring harnesses can be prone to corrosion and loose connections, leading to intermittent electrical faults.

📚 Vehicle History

Brand Heritage

Origin:

Jawa motorcycles are of Czech origin, established in 1929. They were known for robust, practical motorcycles often exported globally.

Model Evolution

353 354 Series:

The 353 (250cc) and 354 (350cc) models were developed from earlier designs and represented Jawa's core offerings during the post-WWII era into the 1950s and 1960s. They were widely produced and sold in many countries, including those in Eastern Europe, Asia, and South America.

Production

Primarily produced from the mid-1950s through the 1960s.