🏷️ Basic Information

Make:

Yamaha

Model:

TT-R125LW

Year:

2000

Variant:

LW (Long Wheelbase)

Model Code:

(M)

👋 Introduction

Segment:

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

Target Audience:

Youth riders, trail riders, beginners in motocross and off-road riding.

Competitors:

Honda CRF100F/CRF125F, Kawasaki KLX125/KLX140, Suzuki DR-Z125.

Vehicle Strengths:

Reliability, ease of maintenance, beginner-friendly power delivery, rugged build quality, long wheelbase for stability.

Purpose:

To provide owners and technicians with the authoritative, factory-specified information required for proper maintenance, repair, and troubleshooting of the 2000 Yamaha TT-R125LW(M).

📋 Manual Details

Market Coverage:

Global (primarily North America and Europe)

Number Of Pages:

Estimated 300-400 pages (typical for a comprehensive service manual of this era)

Type:

Factory Service Repair Workshop Manual

Language:

English

Format:

Digital (PDF) - High Resolution, Searchable, Printable

📖 Manual Coverage

Engine:

Complete engine overhaul, including cylinder, piston, crankshaft, camshaft, valve train, lubrication system, cooling system (air-cooled specifics), and related components.

Fuel System:

Carburetor disassembly, cleaning, adjustment, and troubleshooting (Mikuni VM20 or similar), fuel tank, fuel lines, and petcock.

Transmission:

Gearbox disassembly, inspection, lubrication, and reassembly. Shifting mechanism and related components.

Clutch:

Clutch operation, adjustment, friction plates, pressure plates, and springs.

Electrical System:

Ignition system (CDI, spark plug), lighting (headlight, taillight, brake light), charging system (stator, flywheel), wiring diagrams, battery maintenance, and troubleshooting.

Suspension:

Front fork (telescopic) disassembly, seal replacement, oil levels, and specifications. Rear shock absorber inspection and replacement. Swingarm and linkage maintenance.

Brakes:

Front and rear brake system maintenance (drum brakes for this model), including brake shoe inspection, adjustment, and replacement. Brake lever and cable adjustment.

Chassis:

Frame inspection, headstock bearing maintenance, steering system adjustment, and wheel bearing service.

Bodywork:

Removal and installation of fenders, seat, fuel tank cover, side panels, and handlebars.

Routine Maintenance:

Oil changes, filter replacement, chain lubrication and adjustment, air filter cleaning/replacement, spark plug replacement, valve clearance checks, brake adjustments, and general inspection points.

Troubleshooting:

Step-by-step diagnostic procedures for common performance issues, starting problems, electrical faults, and component failures, often with symptom-based troubleshooting charts.

Repair:

Detailed instructions for disassembly, inspection, repair, and reassembly of all major mechanical and electrical components.

Overhaul:

Comprehensive instructions for complete engine and gearbox rebuilds.

Technical Specifications:

Torque values, clearances, fluid capacities, wiring diagrams, and measurement specifications for all components.

Depth:

Expert-level. Covers everything from basic rider maintenance to complete engine and transmission rebuilds. Includes detailed diagnostic procedures and specifications for professional or advanced amateur mechanics.

📊 Manual Specifications

File Type:

PDF (Portable Document Format)

Searchability:

Text-searchable for quick access to specific topics and keywords.

Quality:

High resolution for clear viewing of illustrations and text. Designed for clear printing.

Binding:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Type:

4-stroke, SOHC, Air-cooled

Displacement:

124 cc

Bore X Stroke:

54.0 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:

Approximately 10-12 HP (at crankshaft, typical for class)

Torque Est:

Approximately 7-8 lb-ft (at crankshaft, typical for class)

Carburetor Model:

Mikuni VM20 (typical)

Fuel Type:

Unleaded gasoline (87 octane or higher recommended)

Oil Type:

Yamalube 4 (or SAE 10W-30 API SE, SF, SG, SH, SJ, SL category service oil)

Oil Capacity:

0.80 L (0.85 US qt, 0.70 Imp qt) without oil filter change; 0.90 L (0.95 US qt, 0.79 Imp qt) with oil filter change.

🔧 Transmission

Transmission Type:

Constant mesh, 5-speed

Gear Ratios:

1st: 2.615, 2nd: 1.818, 3rd: 1.333, 4th: 1.050, 5th: 0.857 (typical ratios, specific values in manual)

Clutch Type:

Wet, multiple-disc

Drive Type:

Chain drive

Final Drive Ratio:

52/14 (typical, 3.714:1)

Transmission Oil Type:

Yamalube 4 (or SAE 10W-30 API SE, SF, SG, SH, SJ, SL category service oil)

Transmission Oil Capacity:

0.52 L (0.55 US qt, 0.46 Imp qt)

📐 Dimensions

Length:

1,840 mm (72.4 in)

Width:

770 mm (30.3 in)

Height:

1,085 mm (42.7 in)

Seat Height:

840 mm (33.1 in)

Ground Clearance:

290 mm (11.4 in)

Wheelbase:

1,295 mm (51.0 in)

Dry Weight:

82 kg (180.8 lbs)

Wet Weight Est:

Approx. 87 kg (191.8 lbs) with fluids

Front Tire:

2.50-21 4PR

Rear Tire:

4.10-18 4PR

Front Brake Type:

Drum

Rear Brake Type:

Drum

Front Suspension Type:

Telescopic fork

Front Suspension Travel:

170 mm (6.7 in)

Rear Suspension Type:

Swingarm (Monocross suspension)

Rear Suspension Travel:

170 mm (6.7 in)

🛡️ Safety Features

Safety Certification:

N/A (Off-road vehicle, not typically road-legal or crash-tested by NHTSA/Euro NCAP)

Braking System:

Mechanical drum brakes front and rear for reliable stopping power in off-road conditions.

Frame Construction:

Steel diamond frame for durability and rider confidence in rough terrain.

Long Wheelbase:

LW model features a longer wheelbase for increased stability, particularly important for less experienced riders.

💡 Technology Features

Infotainment System:

N/A (Basic off-road motorcycle with no advanced electronics or infotainment features).

Assistance Features:

N/A (No electronic rider aids like ABS, traction control, or riding modes).

🔧 Maintenance

Engine Oil Change:

Every 1,000 km (600 miles) or 6 months.

Clutch Cable Adjustment:

As needed, check free play regularly (refer to manual for spec).

Chain Lubrication Adjustment:

Every 500 km (300 miles) or after riding in wet conditions. Check slack regularly.

Air Filter Cleaning:

Every 1,000 km (600 miles) or as needed based on dust conditions.

Spark Plug Inspection:

Every 3,000 km (1,800 miles).

Valve Clearance Check:

Every 6,000 km (3,600 miles).

Engine Oil Viscosity:

SAE 10W-30

Fork Oil Type:

Yamaha Fork Oil G-10 (or equivalent SAE 10W fork oil)

Fork Oil Level:

140 mm (5.51 in) (measured from the top of the inner tube with the fork fully compressed and spring removed)

Carburetor Fouling:

Can occur with infrequent use or poor fuel quality, leading to starting issues or rough running. Regular cleaning and use of fuel stabilizer recommended.

Clutch Wear:

Friction plates can wear over time, especially with aggressive riding, leading to clutch slip. Manual covers inspection and replacement.

Suspension Seals:

Front fork seal leaks are not uncommon and are addressed in the manual for replacement.

Chain And Sprockets:

Wear on the chain and sprockets is expected with use; regular maintenance and replacement are covered.

📚 Vehicle History

Yamaha Legacy:

Yamaha Motor Corporation is renowned globally for its high-performance motorcycles, musical instruments, and marine products. In the motorcycle sector, Yamaha has a rich history of innovation and success in various racing disciplines, including off-road, MotoGP, and Superbike.

Tt-R Lineage:

The TT-R line was introduced as Yamaha's modern offering for the youth and recreational off-road market, replacing older models. The TT-R125 was a significant model, offering a step-up from smaller 80cc class bikes, bridging the gap to larger displacement machines.

2000 Model Year:

The 2000 model year represents one of the early iterations of the TT-R125, establishing its core specifications and features that would carry forward with minor updates in subsequent years. The LW variant specifically catered to riders needing more stability and legroom.

Manufacturing Location:

Primarily manufactured in Japan and/or through Yamaha's global production facilities.

🏆 Awards & Recognition

Industry Awards:

While specific awards for the 2000 TT-R125LW are not widely documented, the TT-R line generally received praise for its durability, ease of use, and value in the youth off-road market.

Consumer Reviews:

Consistently rated well by owners for reliability, suitability for beginner riders, and ease of maintenance. Often cited as a great value for money in its class.

Emissions Certification:

Meets relevant emissions standards for off-road vehicles of its era and region of sale.