🏷️ Basic Information

Make:

Yamaha

Model:

TT-R125

Model Variant:

TT-R125(P), TT-R125LW(P)

Year:

2001

Manual Product Name:

TT-R125(P) LW(P) 2001 Yamaha Service Repair Manual

👋 Introduction

Segment:

Entry-level to intermediate off-road/trail riding motorcycle.

Target Audience:

Beginner riders, younger riders, trail enthusiasts looking for a reliable and manageable off-road machine.

Competitors:

Honda CRF100F/CRF150F, Kawasaki KLX125/KLX140, Suzuki DR-Z125.

Engine Type:

User-friendly 125cc air-cooled 4-stroke engine known for its reliability and torquey power delivery.

Suspension Variants:

The 'LW' designation typically indicates a long-wheelbase version with potentially longer suspension travel or a taller seat height, catering to larger riders or different riding styles.

Ease Of Maintenance:

Designed for relatively straightforward maintenance, making it popular for DIY owners.

📋 Manual Details

Description:

Comprehensive coverage for the maintenance, service, diagnosis, and repair of the 2001 Yamaha TT-R125(P) and TT-R125LW(P) models, mirroring the information used by professional technicians.

Number Of Pages:

509

Type:

Service Repair Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine:

Detailed information on the air-cooled, SOHC, 4-stroke engine, including disassembly, inspection, assembly, valve clearance adjustment, carburetor tuning, and troubleshooting.

Fuel System:

Comprehensive coverage of the fuel tank, fuel lines, fuel filter, and carburetor (likely a Mikuni VM series), including cleaning, adjustment, and component testing.

Ignition System:

CDI (Capacitor Discharge Ignition) system details, including ignition timing, spark plug specifications, and troubleshooting electrical components.

Lubrication System:

Wet sump lubrication, with details on oil pump, oil filter (if applicable), oil change intervals, and oil capacity.

Cooling System:

Air-cooled design, focusing on airflow and fin maintenance.

Transmission:

5-speed constant mesh transmission, including clutch operation, gearbox disassembly, inspection, and lubrication.

Suspension:

Front telescopic forks and rear monocross suspension system. Details on fork oil type, level, seal replacement, shock absorber inspection, and adjustment.

Brakes:

Front disc brake and rear drum brake. Includes brake pad replacement, caliper service, master cylinder inspection, brake fluid specifications, bleeding procedures, and troubleshooting.

Wheels And Tires:

Spoked wheels, tire pressure specifications, tire replacement, wheel bearing service, and balancing.

Electrical System:

Wiring diagrams, lighting system (headlight, taillight, turn signals if equipped), battery maintenance, and troubleshooting electrical faults.

Frame And Body:

Frame inspection, handlebar removal/installation, seat removal, fender replacement, and general chassis maintenance.

Routine Maintenance:

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

Troubleshooting Guides:

Systematic diagnostic procedures for common and uncommon issues, helping technicians pinpoint faults quickly.

Engine Overhaul:

Complete engine disassembly, cleaning, inspection of internal components (piston, rings, cylinder, crankshaft, connecting rod), and reassembly with correct torque specifications.

Transmission Repair:

Gearbox disassembly, inspection of gears, shift forks, and shift drum, clutch plate replacement, and reassembly.

Suspension Rebuild:

Front fork seal replacement, fork oil change, rear shock absorber inspection and potential rebuild (depending on shock type).

Electrical Diagnostics:

Using wiring diagrams to diagnose issues with lighting, ignition, and charging systems.

Carburetor Rebuilding:

Detailed steps for cleaning, inspecting, and replacing jets, needles, and float assemblies in the carburetor.

Depth:

Comprehensive from basic maintenance to complete engine and transmission rebuilds, including detailed diagrams, torque specifications, and troubleshooting trees.

📊 Manual Specifications

Type:

PDF

Searchability:

Likely text-searchable, allowing for quick navigation to specific topics.

Resolution:

High resolution, suitable for printing individual pages or sections as needed.

Binding Method:

N/A (Digital Download)

Paper Description:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

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

Displacement:

124cc

Bore X Stroke:

54.0 mm x 54.5 mm

Compression Ratio:

9.5:1

Carburetor:

Mikuni VM20

Horsepower:

Approx. 10-12 HP (estimation based on similar models)

Torque:

Approx. 7-8 lb-ft (estimation based on similar models)

Fuel Type:

Unleaded gasoline

Fuel Tank Capacity:

Approx. 1.6 gallons (6.0 L)

🔧 Transmission

Transmission Type:

5-speed constant mesh

Clutch Type:

Wet, multiple-disc

Final Drive:

Chain drive

Gear Ratios:

Detailed gear ratios for each of the 5 speeds are available within the manual.

Clutch Adjustment:

Procedures for adjusting clutch lever play and cable tension.

📐 Dimensions

Overall Length:

Approx. 74.4 in (1890 mm) for TT-R125, TT-R125LW may differ slightly.

Overall Width:

Approx. 31.1 in (790 mm)

Overall Height:

Approx. 43.1 in (1095 mm)

Seat Height:

Approx. 31.7 in (805 mm) for TT-R125, LW likely higher.

Wheelbase:

Approx. 50.2 in (1275 mm) for TT-R125, LW likely longer.

Dry Weight:

Approx. 187 lbs (85 kg)

Wet Weight:

Approx. 203 lbs (92 kg) (with fluids)

Maximum Load:

Recommended rider weight limits detailed in manual.

🛡️ Safety Features

Crash Test Results:

N/A (Off-road motorcycle, not subject to standard automotive crash testing)

Braking System:

Disc front, drum rear provides adequate stopping power for its class.

Tires:

Knobby off-road tires provide grip on various terrains.

Frame Construction:

Steel diamond frame for strength and durability.

Lighting:

Headlight and taillight for visibility, though not street-legal without modifications.

💡 Technology Features

Features:

N/A (Basic off-road motorcycle, no electronic infotainment systems).

Features:

N/A (No electronic driver assistance systems).

Features:

N/A (No electronic connectivity features).

🔧 Maintenance

Oil Change:

Every 3,000 km (1,800 miles) or 6 months, whichever comes first (refer to manual for precise interval).

Air Filter Cleaning:

Regular inspection, clean every 1,000 km (600 miles) or more frequently in dusty conditions.

Valve Clearance:

Inspect every 6,000 km (3,600 miles) or annually.

Spark Plug Replacement:

Inspect periodically, replace as needed (specific recommendation in manual).

Chain Lubrication:

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

Engine Oil:

Yamalube 4 (or equivalent) SAE 10W-40 API SE, SF type. Capacity: 0.90 L (0.95 US qt) without oil filter replacement, 0.95 L (1.00 US qt) with filter replacement. (Refer to manual for exact specification and capacity).

Fork Oil:

Yamaha Suspension Oil (or equivalent) SAE 10W. Level: 457 mm (17.99 in) (Refer to manual for exact specification and level).

Brake Fluid:

DOT 3 or DOT 4.

Carburetor Clogging:

Common with infrequent use or poor fuel quality; regular cleaning and proper fuel storage is recommended.

Chain And Sprocket Wear:

Regular adjustment and lubrication are crucial to prolong the life of the drivetrain components.

Fork Seal Leaks:

Can occur over time, especially with aggressive riding; replacement procedures are detailed in the manual.

📚 Vehicle History

Yamaha Motors Co Ltd:

Yamaha has a long and storied history in motorcycle manufacturing, known for innovation, performance, and reliability across various disciplines, including off-road.

Tt-R Series:

The TT-R line was Yamaha's response to the growing popularity of 4-stroke off-road bikes, offering a more accessible alternative to 2-stroke machines, emphasizing ease of use and lower maintenance.

2001 Model:

The 2001 TT-R125 was a key model in this lineup, offering a robust platform for learning and trail riding. The LW variant provided an option for riders seeking a slightly larger bike.

Manufacturing Location:

Typically manufactured in Japan or other Yamaha global facilities.

🏆 Awards & Recognition

Industry Awards:

While specific awards for the 2001 TT-R125 may not be documented publicly, Yamaha's TT-R line generally received positive reviews for its accessibility and suitability for its intended market.

Owner Satisfaction:

Consistently rated well by owners for reliability, ease of maintenance, and suitability for learning off-road riding.

Emissions:

Complies with applicable emissions standards for its model year and intended market.