🏷️ Basic Information

Make:

Yamaha

Model:

TTR125

Model Variant:

TTR 125

Year:

2002

Chassis Code Range:

Likely 5HP or similar, specific to TTR125 models of that era.

Engine Code Range:

Likely 5HP or similar, matching chassis codes.

👋 Introduction

Market Segment:

Entry-level to intermediate off-road/trail riding, youth recreation.

Target User:

New riders, young enthusiasts, trail riders seeking a reliable and easy-to-maintain machine.

Competitors:

Honda CRF100F/125F, Kawasaki KLX110/125, Suzuki DR-Z110/125.

Features:

User-friendly power delivery, durable construction, manageable size and weight, reliable air-cooled engine, electric start (on some variants/years, manual may cover kick-start only or both).

Savings:

Significant cost savings on maintenance, repair, and diagnostics compared to professional shop labor.

📋 Manual Details

Primary Coverage:

Service, Repair, Maintenance, Rebuild, Refurbish, Restoration

Target Audience:

Owners, DIY Mechanics, Professional Technicians

Estimated Pages:

Extensive, typically 300-500+ pages for comprehensive service manuals.

Type:

Service Repair Workshop Manual

Language:

English (standard for most service manuals)

Format:

Digital Download (PDF)

📖 Manual Coverage

Engine:

Complete engine overhaul, diagnosis, tuning, internal components, piston, rings, cylinder, valve train, timing.

Fuel System:

Carburetor (rebuild, tuning, cleaning), fuel lines, fuel filter, fuel tank.

Cooling System:

Air cooling system details, airflow management.

Ignition System:

CDI unit, spark plug, ignition timing, troubleshooting.

Transmission:

Clutch operation, gearbox disassembly, inspection, assembly, lubrication.

Drivetrain:

Chain and sprockets inspection, adjustment, replacement.

Suspension:

Front fork (disassembly, seal replacement, oil levels, tuning), rear shock absorber (inspection, adjustment).

Brakes:

Front and rear brake system inspection, pad replacement, caliper service, brake fluid (if applicable, though often drum for this model), lever/pedal adjustment.

Electrical System:

Wiring diagrams, battery maintenance, lighting, starter (kick start), troubleshooting electrical faults.

Frame And Bodywork:

Frame inspection, body panel removal/installation, seat, fenders, handlebars.

Wheels And Tires:

Spoke tensioning, rim inspection, tire selection and mounting, wheel bearing service.

Basic Maintenance:

Oil changes, filter cleaning/replacement, chain lubrication and adjustment, spark plug inspection and replacement, air filter cleaning/replacement, brake adjustment.

Troubleshooting:

Systematic diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides.

Repair:

Detailed step-by-step instructions for component replacement and repair across all systems.

Rebuild Overhaul:

Comprehensive guides for complete engine, transmission, and suspension overhauls.

Adjustments Tuning:

Carburetor jetting and idle speed adjustments, clutch and throttle cable adjustments, suspension sag and damping adjustments.

Wiring Diagrams:

Complete electrical system schematics for diagnosis and repair.

Depth:

Comprehensive, covering everything from basic checks to complete engine and transmission rebuilds.

Detail Level:

Highly detailed, with torque specifications, clearance measurements, and specific tool requirements.

📊 Manual Specifications

Format:

PDF

Searchability:

Text-searchable (typically for digital versions).

Quality:

High-resolution scans for clear diagrams and text.

Binding:

N/A (Digital Download)

Paper:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

4-stroke, SOHC, Air-cooled

Displacement:

124 cc (or 114cc for some early variants, manual will specify for 2002 model)

Bore X Stroke:

Refer to manual for exact specifications for 2002 model (e.g., 54.0 mm x 54.5 mm for 124cc)

Compression Ratio:

Refer to manual for exact specification (e.g., 9.5:1 or similar)

Horsepower:

Estimated 10-12 HP, refer to manual for exact figures.

Torque:

Estimated 7-8 lb-ft, refer to manual for exact figures.

Carburetor Type:

Mikuni VM series (e.g., VM20 or VM22), specific model detailed in manual.

Fuel Type:

Unleaded Gasoline (Octane rating specified in manual, typically 87 or higher)

Oil Type:

Yamalube or equivalent motorcycle-specific 4-stroke engine oil, SAE 10W-40 or 20W-40 (confirm specific viscosity in manual).

Oil Capacity:

Refer to manual for exact capacity (e.g., ~0.9 - 1.0 L).

🔧 Transmission

Transmission Type:

5-speed constant mesh

Transmission Options:

None for this model/year.

Clutch Type:

Wet, multi-disc

Gear Ratios:

Detailed in manual, essential for performance tuning and troubleshooting.

Transmission Oil Type:

Yamalube or equivalent motorcycle gear oil SAE 80 or 90 (confirm specific grade in manual).

Transmission Oil Capacity:

Refer to manual for exact capacity (e.g., ~0.5 - 0.6 L).

📐 Dimensions

Overall Length:

Refer to manual for exact specification (typical for this class of bike).

Overall Width:

Refer to manual for exact specification.

Overall Height:

Refer to manual for exact specification.

Wheelbase:

Refer to manual for exact specification (e.g., ~1285 mm / 50.6 in).

Dry Weight:

Refer to manual for exact specification (e.g., ~80-85 kg / 176-187 lbs).

Wet Weight:

Refer to manual for exact specification (includes fluids).

Ground Clearance:

Refer to manual for exact specification (crucial for off-road use).

Seat Height:

Refer to manual for exact specification (important for rider fit).

Front Tire Size:

Refer to manual for exact specification (e.g., 70/100-19 or 2.75-21).

Rear Tire Size:

Refer to manual for exact specification (e.g., 90/100-16 or 4.10-18).

Wheel Type:

Spoked wheels (typically).

🛡️ Safety Features

Safety Ratings:

Not applicable for off-road vehicles in the same way as street vehicles; manual focuses on safe operation and maintenance.

Active Safety:

Reliable braking system, responsive handling.

Passive Safety:

Durable frame construction, protective body panels.

💡 Technology Features

Infotainment System:

N/A (Basic off-road motorcycle).

Driver Assistance Features:

N/A (Basic off-road motorcycle).

Connectivity:

N/A (Basic off-road motorcycle).

🔧 Maintenance

Oil Change Interval:

Refer to manual for recommended intervals (e.g., every 1000-2000 km or seasonally).

Air Filter Cleaning:

Refer to manual for recommended intervals (e.g., frequently depending on riding conditions).

Spark Plug Check:

Refer to manual for recommended intervals (e.g., regular inspection).

Valve Clearance Check:

Refer to manual for recommended intervals (e.g., every 5000-10000 km).

Engine Oil Viscosity:

SAE 10W-40 or 20W-40 (confirm with manual).

Transmission Oil Grade:

SAE 80 or 90 gear oil (confirm with manual).

Brake Fluid Type:

If hydraulic brakes are present, DOT 3 or DOT 4 (confirm with manual, many TTR125s used drum brakes).

Common Wear Items:

Clutch plates, brake pads, chain and sprockets, air filter, spark plug, fork seals.

Potential Problems:

Carburetor clogging due to infrequent use or poor fuel quality, clutch wear with aggressive use, suspension wear with heavy off-road use.

📚 Vehicle History

Brand Focus:

Yamaha is renowned for its innovation in motorcycles, including off-road and sport models, with a long history of performance and reliability.

Ttr Series:

The TTR line represents Yamaha's commitment to accessible and fun off-road riding, with models ranging from smaller displacement bikes for beginners to larger displacement trail bikes.

Production Years:

The TTR125 has been in continuous production with various updates and iterations since its introduction, making the 2002 model part of a well-established lineage.

🏆 Awards & Recognition

Industry Awards:

While specific awards for the 2002 model are not widely publicized, the TTR line has consistently been recognized for its reliability and suitability for entry-level off-road riding by enthusiasts and publications.

Owner Satisfaction:

Generally high due to its simplicity, durability, and low running costs.