🏷️ Basic Information

Make:

Yamaha

Model:

TTR125

Year:

2005

Product Type:

Owner's Service Repair Manual

👋 Introduction

Motorcycle Class:

Entry-level to intermediate dirt bike / off-road motorcycle.

Target Audience:

Beginner riders, recreational off-road enthusiasts, youth riders graduating to a larger displacement, general maintenance DIYers.

Key Competitors:

Honda CRF100/125F, Kawasaki KLX110/125, Suzuki DR-Z110/125.

Competitive Advantages:

Reliable air-cooled engine, user-friendly power delivery, durable chassis, extensive aftermarket support, simple maintenance.

Vehicle Design Philosophy:

Robust, easy-to-ride, low-maintenance off-road machine.

Manual Value Proposition:

Empowers owners to perform routine maintenance and repairs, saving time and money, and ensuring the longevity of their Yamaha TTR125.

📋 Manual Details

Engine Coverage:

Complete engine overhaul, tune-up, carburetor, ignition system, cooling system (air-cooled), lubrication system.

Transmission Coverage:

Clutch operation, gear shifting mechanism, internal transmission components, lubrication.

Chassis Coverage:

Frame, suspension (front forks, rear shock), steering, wheels, tires, braking system (front and rear).

Electrical Coverage:

Wiring diagrams, battery, charging system (stator, regulator/rectifier), lighting (headlight, taillight, indicators), ignition system components.

Bodywork Coverage:

Body panels, fenders, seat, fuel tank, graphics, general inspection and cleaning.

Estimated Page Count:

200-300 pages (estimated based on typical service manual content for this class of motorcycle)

Manual Type:

Service and Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine Systems:

Combustion chamber, piston, rings, cylinder, crankshaft, connecting rod, camshaft, valve train, carburetor, exhaust.

Fuel System:

Carburetor model specific tuning, jetting, float level adjustment, fuel filter replacement.

Ignition System:

CDI unit, ignition coil, spark plug specifications and replacement, timing procedures (if applicable).

Cooling System:

Air-cooled engine management and inspection.

Lubrication System:

Oil type, capacity, change intervals, oil filter replacement.

Transmission Systems:

Clutch assembly, primary drive, gearbox components, shifting linkage.

Braking Systems:

Front drum brake, rear drum brake, brake shoe inspection and replacement, brake lever and pedal adjustment.

Suspension Systems:

Front telescopic forks (oil type, level, seal replacement), rear monoshock (adjustment, spring pre-load).

Steering Systems:

Handlebar, steering stem bearings, lubrication, adjustments.

Wheel And Tire Systems:

Wheel bearing inspection and lubrication, spoke tension, tire pressure, tire replacement.

Electrical Systems:

Lighting circuits, charging system, battery maintenance, fuses, switches.

Maintenance Procedures:

Oil changes, filter replacements, spark plug checks/replacement, chain adjustment and lubrication, air filter cleaning/replacement, brake adjustments, tire pressure checks, valve clearance checks.

Repair Procedures:

Engine top-end rebuild (piston, cylinder, head), clutch replacement, carburetor overhaul, fork seal replacement, shock absorber replacement, brake shoe replacement, wheel bearing replacement, electrical component troubleshooting and replacement.

Troubleshooting Guides:

Diagnosing common starting issues, engine performance problems, electrical faults, braking system concerns, suspension behavior.

Diagnostic Procedures:

Checking compression, ignition timing verification (if applicable), carburetor circuit testing.

Assembly Disassembly:

Step-by-step instructions for major component removal and installation (engine, transmission, suspension, wheels).

Diagnostic Capabilities:

Advanced diagnostics for engine performance and electrical systems.

Rebuild Scope:

Complete engine and transmission rebuilds.

Electrical Detail Level:

Detailed wiring diagrams and component testing procedures.

Forensics Detail:

Inspection guidelines for wear and damage on critical components.

📊 Manual Specifications

File Format:

PDF

Resolution:

High-resolution, suitable for digital viewing and printing.

Searchability:

Text-searchable for quick information retrieval.

Binding Type:

N/A (Digital Product)

Paper Type:

N/A (Digital Product)

⚙️ Engine Specifications

Engine Type:

Four-stroke, SOHC, single-cylinder

Displacement:

124 cc

Bore X Stroke:

54 mm x 54 mm (approximate, typical for this engine family)

Cooling System:

Air-cooled

Compression Ratio:

9.5:1 (typical)

Horsepower:

Approx. 10-12 HP (estimated, varies by specific model variant and tuning)

Torque:

Approx. 7-8 lb-ft (estimated, varies by specific model variant and tuning)

Carburetor Model:

Mikuni VM17 (typical)

Fuel Type:

Unleaded gasoline

Fuel Tank Capacity:

1.6 gallons (6.0 L)

🔧 Transmission

Transmission Type:

5-speed constant mesh manual

Clutch Type:

Wet, multiple disc

Final Drive:

Chain drive

Gear Ratios:

Detailed gear ratios provided in the manual for each gear.

📐 Dimensions

Length:

71.7 inches (1820 mm)

Width:

31.7 inches (805 mm)

Height:

43.3 inches (1100 mm)

Wheelbase:

48.8 inches (1240 mm)

Ground Clearance:

10.4 inches (265 mm)

Dry Weight:

174 lbs (79 kg)

Wet Weight:

Approx. 190 lbs (86 kg) (with all fluids)

Maximum Load Capacity:

Not officially specified, typical for recreational use.

🛡️ Safety Features

Safety Ratings:

N/A (Off-road motorcycle not subject to road safety regulations)

Active Safety Features:

Responsive braking system, predictable handling, durable tires.

Passive Safety Features:

Sturdy frame construction, padded handlebars (common aftermarket addition), protective plastics.

💡 Technology Features

Infotainment Features:

N/A (Basic off-road motorcycle design)

Driver Assistance Systems:

N/A (Basic off-road motorcycle design)

Connectivity Options:

N/A (Basic off-road motorcycle design)

🔧 Maintenance

Engine Oil Change:

Every 1,000 miles (1600 km) or 6 months, whichever comes first. (Refer to manual for exact OEM specification.)

Spark Plug Check:

Every 600 miles (1000 km) or annual inspection. Replacement as needed.

Air Filter Cleaning:

Every 300 miles (500 km) or as needed in dusty conditions.

Chain Lubrication:

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

Valve Clearance Check:

Every 3,000 miles (5000 km) or 2 years. (Critical for performance and engine longevity.)

Engine Oil Type:

Yamalube 4 (or equivalent) SAE 10W-40 API SE, SF, or SG or motorcycle-specific 10W-40.

Engine Oil Capacity:

0.95 L (1.0 US qt)

Fork Oil Type:

Yamaha Fork Oil 10W or equivalent.

Fork Oil Quantity:

176 cc per fork leg (refer to manual for exact specification and level check procedure).

Common Wear Items:

Brake shoes, clutch plates, chain and sprockets, tires, spark plugs, air filter.

Potential Issues:

Carburetor jetting can require adjustment for altitude/temperature changes. Fork seals can leak over time. Chain and sprocket wear requires regular attention.

📚 Vehicle History

Brand Focus:

Yamaha's long-standing reputation for producing reliable and performance-oriented motorcycles across various disciplines.

Ttr Series Introduction:

The TTR series has been a cornerstone of Yamaha's off-road lineup for decades, evolving from smaller displacement models to offer a range of options for different rider levels.

Ttr125 Introduction Year:

The TTR125 model line was introduced in the late 1990s/early 2000s, replacing or augmenting previous models like the TT-R125.

Ttr125 Variants:

Available in both standard (kick-start) and LE (electric-start, larger wheels) versions, with minor variations in suspension and brakes over the years.

Manufacturing Location:

Typically manufactured in Japan or other Yamaha global facilities.

Model Production Years:

The TTR125 has been in continuous production for many years, with the 2005 model representing a specific iteration of its development.

🏆 Awards & Recognition

Industry Awards:

While specific awards for the 2005 TTR125 might not be individually documented, the TTR line has consistently been recognized for its reliability and suitability for beginner riders.

Owner Satisfaction:

Generally high owner satisfaction for its intended purpose as a durable and fun off-road machine.

Emissions Certification:

Certified to meet applicable emissions standards for off-road vehicles for its model year.