🏷️ Basic Information

Make:

Yamaha

Model:

TTR125 / TT-R125

Model Variant:

TTR125E (Electric Start), TTR125L (Long Wheelbase), TTR125 (Kick Start)

Year:

2005

Chassis Code Prefix:

5SW

👋 Introduction

Segment:

Entry-level/intermediate off-road motorcycle, popular for recreational trail riding and youth riders.

Competitors:

Honda CRF125F, Kawasaki KLX125, Suzuki DR-Z125.

Target Audience:

DIY enthusiasts, new motorcycle owners, mechanics looking for detailed information.

Value Proposition:

Enables owners to perform maintenance and repairs themselves, saving on labor costs and downtime.

Manual Advantage:

Provides professional-level guidance, often more detailed and accessible than factory service manuals for independent use.

📋 Manual Details

Supported Regions:

Global (specifications may vary slightly by market)

Supported Languages:

English

Estimated Pages:

350-450 (typical for comprehensive workshop manuals)

Type:

Complete Workshop Repair Manual

Format:

Digital Download (PDF)

Device Compatibility:

PC, MAC, Tablets, Smartphones

📖 Manual Coverage

Engine:

Full engine overhaul, top-end, bottom-end, valve adjustments, timing chain, piston, rings, cylinder, crankshaft, connecting rod.

Fuel System:

Carburetor disassembly, cleaning, adjustment, fuel tank, fuel lines, fuel petcock.

Ignition System:

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

Transmission And Drivetrain:

Clutch operation, gearbox inspection, maintenance, chain and sprockets, rear hub.

Suspension:

Front fork disassembly, seals, oil change, rear shock absorber inspection and adjustment.

Brakes:

Front and rear brake systems, caliper overhaul, pad replacement, fluid bleeding, master cylinder.

Electrical System:

Wiring diagrams, lighting, battery, charging system (stator, regulator/rectifier), starter motor (for E model), troubleshooting.

Cooling System:

Air-cooled engine (no liquid cooling).

Chassis And Frame:

Frame inspection, steering head bearing maintenance, swingarm, linkage.

Wheels And Tires:

Spoke tensioning, wheel bearing replacement, tire pressure, tire replacement.

Bodywork And Plastics:

Fairings, seat, fenders, handlebars, controls.

Maintenance:

Regular service, oil changes, filter replacement, lubrication, chain adjustment, brake adjustments.

Troubleshooting:

Diagnostic procedures for common starting, running, and electrical issues.

Repair:

Step-by-step instructions for component removal, repair, and reinstallation.

Overhaul:

Complete engine and transmission rebuild procedures.

Adjustments:

Carburetor tuning, clutch adjustment, throttle cable adjustment, brake lever adjustment.

Wiring Diagrams:

Detailed electrical system schematics.

Depth:

Comprehensive, covering everything from basic fluid checks to full engine rebuilds and electrical diagnostics.

Diagnostic Tools:

Instructions on using basic tools and understanding diagnostic indicators.

Special Tools:

Lists and descriptions of specialized tools required for certain procedures.

📊 Manual Specifications

File Type:

PDF

Searchability:

Text-searchable (OCR optimized for digital platforms)

Printability:

Printable (high-resolution pages)

Resolution:

High-resolution, professional quality scans/digital renderings.

Binding:

N/A (Digital Download)

Paper Quality:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

4-stroke, SOHC, 2-valve, Air-cooled

Displacement:

124 cc

Bore X Stroke:

54 mm x 54 mm

Compression Ratio:

9.5:1 (Typical, may vary slightly)

Carburetor:

Mikuni VM20SS or similar (may vary by specific model/market)

Horsepower:

Approx. 11-12 HP (at crankshaft, estimated)

Torque:

Approx. 7-8 lb-ft (at crankshaft, estimated)

Fuel Type:

Unleaded gasoline (Octane rating typically 87 RON / 91 AKI)

Fuel Tank Capacity:

Approx. 1.6 gallons (6.0 liters)

Oil Type:

SAE 10W-30 API SG or higher (e.g., Yamalube 4-stroke Motorcycle Oil)

Oil Capacity:

Approx. 0.95 liters (1.0 US qt) without filter change, Approx. 1.05 liters (1.1 US qt) with filter change.

Ignition System:

CDI (Capacitor Discharge Ignition)

Spark Plug Gap:

0.6 - 0.7 mm (0.024 - 0.028 in)

Spark Plug Type:

NGK CR7HSA or equivalent

🔧 Transmission

Transmission Type:

5-speed constant mesh

Clutch Type:

Wet, multiple-disc

Drive Type:

Chain Drive

Final Drive Ratio:

Typically 52T rear sprocket / 14T front sprocket (4.17:1 ratio, may vary)

Transmission Oil Type:

SAE 10W-30 API SG or higher (same as engine oil)

Transmission Oil Capacity:

Approx. 0.55 liters (0.58 US qt)

📐 Dimensions

Length:

Approx. 73.0 in (1855 mm) for TTR125L / 70.9 in (1800 mm) for TTR125

Width:

Approx. 31.7 in (805 mm)

Height:

Approx. 43.3 in (1100 mm)

Seat Height:

Approx. 32.1 in (815 mm) for TTR125L / 31.1 in (790 mm) for TTR125

Ground Clearance:

Approx. 11.8 in (300 mm) for TTR125L / 10.0 in (255 mm) for TTR125

Dry Weight:

Approx. 178 lbs (81 kg) for TTR125E / 172 lbs (78 kg) for TTR125L

Wet Weight:

Approx. 190 lbs (86 kg) for TTR125E (estimated)

Front Tire Size:

70/100-17 4PR

Rear Tire Size:

90/100-14 4PR (TTR125L) / 90/100-16 4PR (TTR125)

Wheelbase:

Approx. 50.2 in (1275 mm) for TTR125L / 49.2 in (1250 mm) for TTR125

🛡️ Safety Features

Safety Standards:

Designed for off-road use, not street legal (unless modified and registered).

Braking System:

Hydraulic disc front brake, Drum rear brake.

Lighting:

Headlight, Taillight/Brake light (operates when braking).

Frame Construction:

Steel diamond frame.

Engine Kill Switch:

Handlebar-mounted kill switch for immediate engine shutdown.

💡 Technology Features

Infotainment System:

N/A (This is a dirt bike with minimal electronics beyond basic starting and lighting).

🔧 Maintenance

Engine Oil Change:

Every 1000 km (600 miles) or 6 months, whichever comes first. More frequently for hard riding.

Air Filter Cleaning:

Every 1000 km (600 miles) or more frequently in dusty conditions.

Spark Plug Inspection:

Every 1000 km (600 miles).

Valve Clearance Check:

Every 4000 km (2500 miles) or 1 year.

Chain Lubrication And Adjustment:

Every 500 km (300 miles) or after washing/riding in wet conditions.

Brake Fluid:

DOT 3 or DOT 4 compatible hydraulic brake fluid.

Carburetor Fouling:

Can be prone to gumming up if fuel sits for extended periods; requires regular cleaning and proper fuel stabilizer usage.

Chain And Sprocket Wear:

Regular maintenance is key; aggressive riding can accelerate wear.

Suspension Seals:

Fork seal leaks can occur with hard use; manual provides seal replacement procedures.

Electric Starter Reliability:

While convenient, the starter motor and associated components (battery, starter solenoid) require proper maintenance for optimal performance (on E models).

📚 Vehicle History

Heritage:

Yamaha Motor Company, founded in 1955, has a long history of producing reliable and performance-oriented motorcycles across various segments, including motocross, dirt bikes, and street bikes.

Predecessors:

The TTR line evolved from earlier Yamaha trail bikes, offering a more modern platform with improved suspension and ergonomics.

Key Developments For 2005:

Introduction of Electric Start (TTR125E) and the Long Wheelbase (TTR125L) variant for better stability and rider fit for larger or more experienced riders. Graphic updates and minor tuning adjustments.

Production Period:

The TTR125 series has been in continuous production since its introduction, with ongoing updates and variations.

Manufacturing Location:

Primarily manufactured in Japan and other Yamaha facilities globally.

🏆 Awards & Recognition

Industry Acclaim:

Consistently praised for its reliability, ease of maintenance, and suitability for beginner and intermediate riders. Often cited as a benchmark in its class for value and capability.

User Reviews:

Generally high user ratings for durability and fun factor.

Certification:

N/A (Off-road vehicles are not subject to the same emissions/safety certifications as street vehicles).