🏷️ Basic Information

Make:

Yamaha

Model:

TTR125

Model Variant:

TT-R125

Year:

2001

Platform Code:

4FU

Engine Code Prefix:

5HP

👋 Introduction

Segment:

Entry-level to intermediate off-road/trail motorcycle

Target Audience:

Novice riders, trail enthusiasts, young riders, recreational users

Key Competitors:

Honda CRF100F/CRF125F, Kawasaki KLX125, Suzuki DR-Z125

Yamaha Advantage:

Reliable air-cooled engine, user-friendly power delivery, robust chassis

Engine Type:

Air-cooled, 4-stroke, SOHC

Transmission:

5-speed constant mesh

Suspension Frontend:

Telescopic forks

Suspension Rear:

Monoshock with adjustable preload

Brakes:

Front disc, Rear drum

📋 Manual Details

Coverage Scope:

Complete Workshop Repair and Service

Diagnostic Coverage:

Extensive troubleshooting and diagnostic procedures

Estimated Pages:

300+

Type:

Workshop Repair Manual

Purpose:

DIY repairs and professional servicing

Language:

English

Format:

Digital Download (PDF compatible)

Device Compatibility:

All PCs, MACs, Tablets & Smartphones

📖 Manual Coverage

Engine Mechanical:

Complete engine overhaul, cylinder head, piston, crankshaft, camshaft, valve train, timing

Fuel System:

Carburetor (Mikuni VM series typical), fuel tank, fuel lines, fuel pump (if applicable)

Ignition System:

CDI ignition, spark plug, coil, stator, wiring

Lubrication System:

Oil pump, oil filter, oil passages, oil change procedures

Cooling System:

Air-cooled engine design, cylinder fins, heat dissipation

Transmission Drivetrain:

Clutch operation, gear selection, gearbox disassembly and assembly, final drive chain maintenance

Suspension Front:

Telescopic front fork service, oil levels, seals, spring rates, adjustment procedures

Suspension Rear:

Monoshock rear suspension, linkage maintenance, shock absorber service, adjustments

Brakes Front:

Disc brake system, caliper service, pad replacement, rotor inspection, hydraulic system bleeding

Brakes Rear:

Drum brake system, shoe replacement, adjustment, inspection

Wheels Tires:

Wheel bearing service, spoke tension adjustment, tire pressure recommendations, wheel removal/installation

Electrical System:

Lighting, horn, battery, charging system, wiring diagrams, component testing

Chassis Frame:

Frame inspection, steering head bearing service, swingarm lubrication and inspection

Bodywork Controls:

Handlebar, levers, pedals, seat, fenders, plastics, decals

Maintenance:

Regular scheduled maintenance, oil changes, filter replacements, chain adjustments, lubrication points

Troubleshooting:

Systematic diagnostic guides for common and uncommon issues, symptom-based problem solving

Repair Rebuild:

Complete step-by-step disassembly, inspection, repair, and reassembly of all major components

Adjustments:

Carburetor tuning, valve clearance adjustment, brake adjustments, clutch lever adjustment

Wiring Diagrams:

Detailed electrical system schematics for easy fault finding

Depth Level:

Comprehensive Professional Workshop Manual

Diagnostic Tools:

Information on necessary tools and equipment for diagnostics and repair

Torque Specifications:

Precise torque values for all critical fasteners

Clearances:

Engine component clearances (piston-to-cylinder, valve-to-rocker arm, etc.)

Part Identification:

Identification of all parts with diagrams and part numbers where applicable

📊 Manual Specifications

File Type:

PDF (Portable Document Format)

Searchability:

Fully searchable text for quick information retrieval

Printability:

Printable pages for workshop use

Image Resolution:

High-resolution images and diagrams

Layout:

Clear, well-organized layout with easy-to-follow instructions

Binding:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

Air-cooled, four-stroke, SOHC

Displacement:

124 cc

Bore X Stroke:

54 mm x 54.5 mm

Compression Ratio:

9.5:1

Valve Clearance Intake:

0.04 - 0.08 mm (Cold)

Valve Clearance Exhaust:

0.06 - 0.10 mm (Cold)

Horsepower Est:

~10-12 HP (at ~8000 RPM)

Torque Est:

~8-9 lb-ft (at ~6000 RPM)

Carburetor Type:

Mikuni VM20SS (typical, may vary)

Fuel Type:

Unleaded gasoline (91 octane or higher recommended)

Fuel Tank Capacity:

2.4 L (0.6 US gal)

🔧 Transmission

Transmission Type:

5-speed constant mesh

Clutch Type:

Wet, multiple disc

Final Drive:

Chain drive (520 pitch)

Gear Ratios Primary:

18/68 (1:3.78)

Gear Ratios Transmission:

1st: 3.000 (30/10), 2nd: 1.933 (29/15), 3rd: 1.350 (27/20), 4th: 1.000 (25/25), 5th: 0.850 (17/20)

Transmission Oil Type:

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

Transmission Oil Capacity:

1.0 L (1.1 US qt)

📐 Dimensions

Length:

1830 mm (72.0 in)

Width:

765 mm (30.1 in)

Height:

1080 mm (42.5 in)

Wheelbase:

1255 mm (49.4 in)

Ground Clearance:

285 mm (11.2 in)

Seat Height:

805 mm (31.7 in)

Dry Weight:

82 kg (181 lbs)

Wet Weight Est:

87 kg (192 lbs)

Front Tire Size:

70/100-19M/C 42P

Rear Tire Size:

90/100-16M/C 51P

Front Tire Pressure:

25 psi (175 kPa)

Rear Tire Pressure:

28 psi (195 kPa)

🛡️ Safety Features

Safety Features:

Designed for off-road use; no active safety features like ABS or traction control

ABS:

Not equipped

Traction Control:

Not equipped

Lighting:

Headlight, taillight/stoplight, front and rear turn signals (markets vary)

Horn:

Equipped

💡 Technology Features

Infotainment System:

N/A (Basic off-road motorcycle)

🔧 Maintenance

Engine Oil Change:

Every 1000 km (600 miles) or 6 months

Oil Filter Replacement:

At every oil change (internal screen type)

Air Filter Cleaning:

Every 500 km (300 miles) or 3 months; replace annually

Spark Plug Inspection:

Every 1000 km (600 miles)

Valve Clearance Check:

Every 3000 km (1800 miles) or 12 months

Chain Lubrication Adjustment:

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

Engine Oil:

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

Brake Fluid:

DOT 3 or DOT 4 conforming to FMVSS 116

Fork Oil Type:

Yamaha Fork Oil (or SAE 10W equivalent)

Fork Oil Capacity Per Leg:

260 ml (0.27 US qt)

Carburetor Cleaning:

Common for fuel jets to clog with prolonged storage or dirty fuel, requiring periodic cleaning and proper fuel stabilizer use.

Chain Tension:

Proper chain tension is crucial for drivetrain longevity; frequent checks and adjustments are recommended.

Fork Seals:

Like many off-road bikes, fork seals can wear over time due to dust and debris, potentially leading to leaks.

Rear Shock Adjustment:

The rear shock's preload adjustment can be crucial for rider comfort and handling depending on terrain and rider weight.

📚 Vehicle History

Yamaha Motorcycles:

Yamaha Motor Company, founded in 1955, has a long and distinguished history in motorcycle manufacturing, renowned for innovation and performance across various disciplines.

Ttr Series:

The TTR line represents Yamaha's durable and user-friendly off-road motorcycles, catering to recreational riders and aspiring racers.

Ttr125 Introduction:

The TTR125 was introduced as a successor to smaller-displacement trail bikes, offering a larger engine and more robust chassis, available in both standard and electric-start (TTR125E) variants, as well as a Big Wheel version.

Manufacturing Location:

Primarily Japan

Production Years:

The TTR125 model line has been in continuous production since its introduction, with updates and variations over the years.

🏆 Awards & Recognition

Industry Reputation:

The TTR125 is widely recognized for its reliability, ease of use, and value for money in its class, making it a popular choice for entry-level off-road riding.

User Reviews:

Consistently receives positive user reviews for durability and suitability for its intended purpose.

Emissions Compliance:

Designed to meet relevant emissions standards for its model year and market of sale.