🏷️ Basic Information

Make:

Yamaha

Model:

TT-R125

Year:

2006

Model Variants:

E, L, LE

Product Type:

Owner's / Motorcycle Service Repair Manual

👋 Introduction

Segment:

Entry-level to intermediate off-road/dirt bike, often used for trail riding, recreational off-roading, and as a beginner's competition machine.

Competitors:

Competes with models like the Honda CRF125F, Kawasaki KLX125, Suzuki DR-Z125, and KTM 125 SX (though the latter is typically a more performance-oriented, 2-stroke model).

Strengths:

Reliable air-cooled engine, user-friendly power delivery, relatively low seat height (especially on 'L' variants), durable construction, accessible maintenance, and good for developing riding skills.

Variants Distinction:

E (Electric Start), L (Longer wheelbase, taller suspension), LE (Electric Start, Longer wheelbase, taller suspension). This manual covers all three, noting specific differences where applicable.

📋 Manual Details

Manual Scope:

Comprehensive service, repair, and maintenance information for the 2006 Yamaha TT-R125E, TT-R125L, and TT-R125LE models.

Estimated Page Count:

Approximately 200-300 pages (typical for this class of service manual).

Type:

Factory Authorized Service Manual / Repair Manual

Language:

English

Format:

Digital (PDF) - Searchable, printable.

📖 Manual Coverage

Engine:

Complete engine disassembly, assembly, inspection, and repair procedures for the 124cc air-cooled 4-stroke engine. Includes top-end, bottom-end, valve train, cooling system.

Fuel System:

Carburetor (Mikuni VM17 type typically) disassembly, cleaning, adjustment, and troubleshooting. Fuel tank and petcock maintenance.

Transmission:

Clutch operation, adjustment, and replacement. Gearbox internal inspection, repair, and lubrication specifications. Shift mechanism.

Chassis:

Frame inspection and repair. Swingarm and linkage lubrication and bearing checks. Rear shock absorber adjustment and replacement.

Suspension:

Front fork disassembly, inspection, seal replacement, oil type, and level specifications. Rear suspension linkage and shock absorber service.

Brakes:

Front and rear brake system maintenance, including brake pad replacement, caliper service, master cylinder overhaul, brake fluid type, bleeding procedures, and disc inspection.

Electrical System:

Ignition system (CDI), lighting circuits, charging system (stator, regulator/rectifier), battery maintenance, fuse specifications, and wiring diagrams.

Cooling System:

Air-cooling system inspection and component identification (fins, airflow). Specific mentions are for air-cooled engines.

Exhaust System:

Exhaust pipe and muffler inspection, maintenance, and potential repair guidance.

Wheels Tires:

Wheel bearing maintenance, spoke tension adjustment (if applicable to specific variants), tire pressure recommendations, and wheel installation.

Maintenance:

Scheduled maintenance intervals, oil changes, filter replacements, spark plug checks and replacement, chain adjustment, lubrication points.

Troubleshooting:

Systematic diagnostic guides for common issues, including starting problems, performance issues, electrical faults, and braking concerns.

Repair:

Detailed step-by-step repair instructions for all major components and systems, including engine rebuilds, transmission overhauls, and suspension work.

Adjustments:

Carburetor jetting and idle speed adjustments, clutch lever free play, throttle cable free play, brake lever free play, chain slack.

Disassembly Assembly:

Complete breakdown and reassembly instructions for all motorcycle components.

Specifications:

Torque specifications for all fasteners, valve clearances, engine component tolerances, fluid capacities, and electrical resistance values.

Depth:

Factory-level diagnostic and repair procedures, suitable for dealership technicians and experienced DIY mechanics. Covers everything from basic fluid changes to complete engine and transmission rebuilds.

📊 Manual Specifications

PDF Quality:

High-resolution, text-searchable PDF for easy navigation and printing of specific sections.

Printable:

Fully printable pages, designed for clear reproduction of diagrams and text.

Binding:

N/A (Digital Format)

Paper:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Type:

124cc, Air-Cooled, Four-stroke, SOHC, 2-Valve

Bore X Stroke:

54.0 mm x 54.5 mm

Compression Ratio:

9.5:1 (Typical, may vary slightly)

Horsepower:

Approximately 10-12 HP at 7500-8000 RPM (estimated, depends on specific tuning and variant).

Torque:

Approximately 7-8 lb-ft at 5500-6000 RPM (estimated).

Carburetor:

Mikuni VM17 (typical), Single Downdraft

Ignition System:

CDI (Capacitor Discharge Ignition)

Oil Type:

SAE 10W-40 API SG or higher motorcycle-specific oil.

Engine Oil Capacity:

0.90 Liters (0.95 US qt) without oil filter change; 1.00 Liters (1.05 US qt) with oil filter change.

🔧 Transmission

Transmission Type:

5-Speed Manual Transmission

Transmission Options:

N/A (Standard manual transmission for all variants)

Clutch Type:

Wet, Multi-disc Clutch

Final Drive:

Chain Drive

📐 Dimensions

Overall Length:

Approx. 1800-1850 mm (depending on variant: L/LE are longer)

Overall Width:

Approx. 770-800 mm

Overall Height:

Approx. 1060-1120 mm (depending on variant: L/LE are taller)

Seat Height:

Approx. 775 mm (standard), 810 mm (L/LE variants)

Ground Clearance:

Approx. 280-300 mm (depending on variant)

Dry Weight:

Approx. 80-85 kg (depending on variant: E/L/LE and electric start system)

Wet Weight:

Approx. 85-90 kg (estimated)

Fuel Capacity:

6.0 Liters (1.6 US gal) including reserve

🛡️ Safety Features

Safety Certification:

Off-road vehicles typically do not have NHTSA/Euro NCAP ratings. Emphasis on rider safety through design and maintenance guidance within the manual.

Braking System:

Front: Drum brake; Rear: Drum brake. (Note: Some later TT-R125 models may have front disc brakes, but 2006 base models often featured drums for simplicity and cost).

Frame Design:

Steel Diamond Frame provides a sturdy platform for off-road use.

Lighting:

Headlight and Taillight for visibility. Manual covers electrical maintenance for these.

💡 Technology Features

Features:

N/A (This is a basic off-road motorcycle, no electronic infotainment systems).

Features:

N/A (No electronic driver assistance systems). Focus on mechanical controls and rider skill.

Features:

N/A (No connectivity features).

🔧 Maintenance

Initial Break In:

First service typically around 600 miles (1000 km) or 6 months, including oil change, filter clean, chain adjustment, and general inspection. Manual will detail specific break-in procedures.

Regular Oil Change:

Every 1000 miles (1600 km) or 6 months. More frequently under severe riding conditions.

Air Filter Cleaning:

Every 600 miles (1000 km), more often in dusty conditions.

Spark Plug Check:

Every 1000 miles (1600 km).

Valve Clearance Check:

Every 1200 miles (2000 km) or as specified in the manual.

Brake Fluid:

DOT 3 or DOT 4 Hydraulic Brake Fluid.

Fork Oil:

Yamaha Suspension Fluid (or equivalent SAE 10W fork oil). Exact quantity and level specified in manual.

Common Wear Items:

Chain and sprockets wear, brake pad wear, fork seal leaks, carburetor gumming if left unused for long periods.

Engine Durability:

Generally robust, but adherence to maintenance schedule is crucial for longevity. Valve adjustments are important for optimal performance and engine health.

📚 Vehicle History

Yamaha Legacy:

Yamaha Motor Company, a subsidiary of Yamaha Corporation, has a long-standing reputation for producing high-quality motorcycles, known for innovation and performance across various segments including off-road, sport, and street bikes.

Tt-R Lineage:

The TT-R line represents Yamaha's commitment to the recreational and entry-level dirt bike market. The TT-R125 was introduced as a successor to smaller displacement bikes, offering more power and features suitable for a wider range of riders.

Manufacturing Location:

Typically manufactured in Japan or other Yamaha global production facilities.

🏆 Awards & Recognition

Market Reputation:

The TT-R125 has consistently been well-regarded in its segment for its reliability, ease of use, and value for money, making it a popular choice for new riders and families.