Yamaha TW125 1999 Workshop Service Manual Repair

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Tipo: Motorcycle

Proveedor:

SKU: 69705

Etiquetas: 1999 Marine Motorcycle Sterndrive TW125 Yamaha

Variantes de producto

Descripción

The 1999 Yamaha TW125 is a lightweight dual-sport motorcycle renowned for its distinctive fat tires, which provide exceptional traction and a comfortable ride across various terrains. Designed for trail riding and light adventure, this model embodies a commitment to simplicity, ease of use, and robust construction. Its air-cooled, 124cc engine, coupled with a 5-speed transmission and a durable steel cradle frame, makes it a capable and reliable machine. The TW125 offers a unique blend of off-road prowess and user-friendly operation, positioning it as a practical choice for enthusiasts and everyday riders alike. This workshop service manual provides comprehensive guidance for the maintenance and repair of your 1999 Yamaha TW125. It covers all essential systems, including detailed procedures for engine overhaul, transmission service, fuel and ignition system tuning, and electrical diagnostics. The manual also includes information on suspension and braking systems, chassis maintenance, and bodywork. With its in-depth troubleshooting guides, routine maintenance schedules, and technical specifications, this manual is an indispensable resource for professional technicians and DIY owners aiming to keep their TW125 in optimal condition.

🏷️ Basic Information

Identification

Make:

Yamaha

Model:

TW125

Year:

Market Segment:

Dual-Sport/Trail Motorcycle

Codes

Chassis Code:

Likely 5FL or similar Yamaha internal code

👋 Introduction

Market Position

Vehicle Class:

Lightweight dual-sport motorcycle known for its simplicity, ease of use, and off-road capability, particularly favored for trail riding and light adventure.

Competitive Analysis

Competitors:

Competed with other 125cc dual-sport motorcycles from manufacturers like Honda (e.g., XR125), Suzuki (e.g., DR125), and Kawasaki (e.g., KLR125) of the era.

Key Features

Unique Selling Points:

Fat tires (hence 'TW'), which provide exceptional traction and comfort on varied terrain, simple air-cooled engine, robust construction.

Manual Value Proposition

Target Audience:

Professional motorcycle technicians, independent repair shops, and ambitious DIY owners seeking to maintain or restore their 1999 Yamaha TW125.

📋 Manual Details

Coverage Areas

Geographical Coverage:

Global (likely focused on markets where TW125 was officially sold, e.g., Europe, Japan)

Page Count

Estimated Page Count:

Hundreds of pages (as stated in product description)

Manual Type

Manual Type:

Workshop Service Manual / Repair Manual

Language

Language:

English

Format

Digital Format:

PDF Download

📖 Manual Coverage

Systems Covered

Engine:

Detailed overhaul, tuning, troubleshooting of the 125cc engine.

Transmission:

Clutch, gearbox, final drive maintenance and repair.

Fuel System:

Carburetor (likely Mikuni VM series), fuel lines, fuel tank inspection and service.

Ignition System:

CDI unit, ignition coil, spark plug, timing checks.

Electrical System:

Wiring diagrams, lighting, battery, charging system (stator, regulator/rectifier), starting system.

Suspension:

Front telescopic forks (oil change, seal replacement) and rear monoshock absorber (adjustment, overhaul).

Braking System:

Front and rear drum or disc brakes (depending on specific market variant), hydraulic components, pad/shoe replacement, fluid.

Chassis And Frame:

Frame inspection, steering head bearings, swingarm bearings.

Bodywork And Trim:

Fenders, seat, fuel tank removal and installation, minor body panel repairs.

Procedures Included

Routine Maintenance:

Oil changes, filter replacements, chain adjustment, lubrication, tire pressure checks.

Troubleshooting:

Systematic diagnostic procedures for common and uncommon faults.

Engine Rebuild:

Complete engine disassembly, inspection, part replacement, and reassembly.

Carburetor Overhaul:

Jet cleaning, float level adjustment, mixture screw settings.

Electrical Diagnostics:

Using wiring diagrams to trace faults, testing components.

Suspension Service:

Fork seal replacement, fork oil viscosity and level specifications.

Brake System Maintenance:

Bleeding procedures, inspection of brake components.

Technical Depth

Depth Of Information:

Comprehensive, suitable for professional technicians and advanced DIY mechanics.

Diagnostic Capability:

Advanced diagnostic flowcharts and troubleshooting trees.

Rebuild Information:

Detailed overhaul procedures for major components including engine, transmission, and suspension.

📊 Manual Specifications

File Format

File Format:

Print Quality

Printability:

Full Printable

Zoom Capability:

Binding Type

Binding Type:

N/A (Digital Download)

Paper Type

Paper Type:

N/A (Digital Download)

Software Requirements

PDF Reader:

Adobe PDF Reader

Compression Utility:

WinRAR

Compatibility

Operating Systems:

All Versions of Windows & Mac

⚙️ Engine Specifications

Primary Engine

Engine Type:

Air-cooled, four-stroke, SOHC, single-cylinder

Displacement:

124 cc

Bore X Stroke:

54 mm x 54 mm (Typical for this era Yamaha 125cc)

Compression Ratio:

Likely around 9.5:1 to 10.5:1

Performance

Horsepower:

Approximately 10-12 HP (actual figures vary by market and tuning)

Torque:

Approximately 9-10 Nm (actual figures vary by market and tuning)

Fuel System

Carburetor Type:

Mikuni VM Series (e.g., VM20 or VM22), single carburetor

Fuel Capacity:

Approximately 9 Liters (including reserve)

Lubrication

Oil Type:

API SE, SF, SG, SH or higher, SAE 10W-40 recommended (check manual for exact specification)

Oil Capacity:

Approximately 1.0-1.2 Liters (with oil filter change)

🔧 Transmission

Standard

Transmission Type:

5-speed constant mesh

Clutch Type:

Wet, multiple-disc

Final Drive:

Chain drive

Features

Gear Ratios:

Specific ratios detailed in the manual, designed for tractable off-road power delivery.

Transmission Oil Type:

Yamalube 4 (or equivalent) SAE 10W-40, API SE, SF, SG, SH or higher

📐 Dimensions

Exterior

Overall Length:

Approx. 2055 mm

Overall Width:

Approx. 820 mm

Overall Height:

Approx. 1115 mm

Seat Height:

Approx. 800 mm

Weights

Dry Weight:

Approx. 110-115 kg

Wet Weight:

Approx. 117-122 kg

Wheels Tires

Front Tire Size:

130/80-18 (distinctive fat tire)

Rear Tire Size:

180/80-14 (distinctive fat tire)

🛡️ Safety Features

Ratings

Safety Standards:

Complies with relevant local motorcycle safety and emissions standards of the time.

Active Features

Lighting:

Headlight, taillight, brake lights, turn signals.

Passive Features

Frame Design:

Steel cradle frame providing good stability and durability for trail use.

💡 Technology Features

Infotainment

Infotainment System:

N/A (Basic motorcycle instrumentation: speedometer, odometer, neutral indicator, high beam indicator).

Driver Assistance

Driver Assistance Features:

N/A (No electronic rider aids typical for this era and class of motorcycle).

Connectivity

Connectivity Features:

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 3,000 km or 6 months (refer to manual for precise recommendations)

Air Filter Cleaning:

Every 2,000 km or 12 months

Spark Plug Replacement:

Every 10,000 km

Fluid Specifications

Fork Oil Viscosity:

Yamaha Fork Oil 10W or equivalent (check manual for capacity)

Brake Fluid:

DOT 3 or DOT 4 (check manual for specific recommendation and bleeding procedure)

Known Issues

Common Wear Items:

Tire wear (due to fat profile), chain and sprockets, brake pads/shoes, fork seals.

Carburetor Tuning:

Carburetors can sometimes require fine-tuning or cleaning due to age and fuel quality, especially if the bike has been sitting.

Electrical Connections:

Corrosion in electrical connectors can lead to intermittent issues, particularly on bikes used in damp environments.

📚 Vehicle History

Brand Heritage

Yamaha Legacy:

Yamaha has a long history of producing reliable and capable motorcycles across various segments, known for innovation and performance.

Model Evolution

Tw Series:

The TW series, known for its distinctive fat tires, originated with the TW200 and later evolved to include models like the TW125, emphasizing ease of use and versatility for off-road and urban commuting.

Production

Production Period:

The TW125 was produced for a period from the late 1990s into the early 2000s, with variations in specification across different markets.

🏆 Awards & Recognition

Recognitions

Industry Recognition:

While not typically winning specific awards, the TW series is recognized for its unique design and functional capability, making it a popular choice for niche applications and dedicated enthusiasts.

Ratings

Reliability Reputation:

Yamaha's reputation for reliability generally extends to the TW125, making it a dependable platform when properly maintained.