Market Segment:
Beginner to intermediate off-road motorcycle enthusiasts, trail riding, recreational use.
Target Audience:
Youth riders, beginner trail riders, casual off-road enthusiasts, and those seeking an economical and manageable dirt bike.
Competitors:
Honda CRF100F/CRF125F, Kawasaki KLX110/KLX125, Suzuki DR-Z125.
Key Features Vehicle:
Lightweight, user-friendly, reliable 4-stroke engine, available in standard and long-wheelbase versions, electric start option (E, LWE models), suitable for youth and smaller adult riders.
Key Features Manual:
Instant download, comprehensive repair and maintenance data, detailed diagrams, troubleshooting guides, specific to 2004 models and variants.
Manual Type:
Service Repair Manual
Format:
Digital Download (likely PDF)
Manual Coverage Scope:
Covers all aspects of service, repair, maintenance, and troubleshooting for the specified 2004 Yamaha TT-R125 models.
Page Count:
Unspecified (typical for this type of manual is 300-500+ pages)
Engine Systems:
Engine assembly, disassembly, inspection, lubrication, cooling system, fuel system (carburetor), ignition system, exhaust system, emissions controls.
Chassis Systems:
Frame, suspension (front fork, rear shock absorber), steering, wheels, tires, brakes (front disc, rear drum/disc depending on variant), drive chain, swingarm.
Electrical Systems:
Wiring diagrams, lighting system, ignition switch, battery, charging system (if applicable), starter system (for E variants), troubleshooting electrical faults.
Maintenance Procedures:
Routine checks, oil changes, filter replacement, chain adjustment and lubrication, brake pad inspection and replacement, spark plug service, air filter cleaning/replacement.
Repair Procedures:
Engine rebuild, carburetor tuning and overhaul, suspension component replacement, brake system servicing, electrical component diagnosis and repair, clutch adjustment and replacement.
Troubleshooting:
Common problems, diagnostic flowcharts, symptom-based troubleshooting for engine performance, electrical issues, and handling.
Technical Depth:
Comprehensive coverage from basic maintenance to full engine and chassis rebuilds, including detailed specifications, torque values, and diagnostic procedures.
Diagnostic Tools:
Covers standard tools and procedures for diagnosis, no specialized electronic diagnostic equipment is typically required for this model.
Engine Type:
Air-cooled, four-stroke, SOHC, 2-valve
Bore X Stroke:
54.0 mm x 54.5 mm
Engine Family:
TT-R Series
Horsepower:
Approx. 10.5 HP (at 8000 rpm)
Torque:
Approx. 8.2 lb-ft (at 7000 rpm)
Carburetor Type:
Mikuni VM20SS (or similar 20mm constant velocity carburetor)
Fuel Capacity:
1.7 L (0.45 US gal)
Oil Type:
Yamalube 4 (or SAE 10W-30 API SG or higher) motorcycle oil
Oil Capacity:
0.80 L (0.85 US qt) without oil filter change, 0.90 L (0.95 US qt) with oil filter change
Length:
1765 mm (69.5 in) for TT-R125/125E; 1835 mm (72.2 in) for TT-R125LW/LWE
Height:
1010 mm (39.8 in) for TT-R125/125E; 1075 mm (42.3 in) for TT-R125LW/LWE
Wheelbase:
1230 mm (48.4 in) for TT-R125/125E; 1275 mm (50.2 in) for TT-R125LW/LWE
Ground Clearance:
255 mm (10.0 in) for TT-R125/125E; 295 mm (11.6 in) for TT-R125LW/LWE
Seat Height:
790 mm (31.1 in) for TT-R125/125E; 835 mm (32.9 in) for TT-R125LW/LWE
Front Tire Size:
2.50-17 4PR
Rear Tire Size:
3.50-14 4PR (for TT-R125/E); 4.10-18 4PR (for TT-R125LW/LWE)
Dry Weight:
81 kg (178.6 lbs) for TT-R125/125E; 83 kg (183 lbs) for TT-R125LW/LWE
Curb Weight:
N/A (typical for this class, not always specified)
Safety Certifications:
N/A (Off-road motorcycles are generally not subject to the same automotive safety ratings).
Braking System:
Front: Hydraulic disc brake. Rear: Drum brake (TT-R125/E), Disc brake (TT-R125LW/LWE).
Suspension Features:
Front: Telescopic fork. Rear: Monocross swingarm with adjustable shock absorber (preload).
Lighting:
Headlight, taillight/brake light.
Throttle Limiter:
Some models may include provisions for limiting throttle throw for younger riders.
Infotainment System:
N/A (Basic recreational off-road motorcycle, no infotainment features).
Assistance Features:
N/A (No electronic rider aids or driver assistance features).
Connectivity Features:
N/A (No electronic connectivity features).
Starting Mechanism:
Kick starter (standard on all models). Electric starter (featured on TT-R125E and TT-R125LWE variants).
Engine Oil Change:
Every 1000 km (600 miles) or 6 months, whichever comes first. More frequently for hard use.
Air Filter Cleaning:
Every 500 km (300 miles) or monthly. Clean more often in dusty conditions.
Spark Plug Inspection:
Every 1000 km (600 miles) or 6 months.
Chain Lubrication:
Every 300 km (200 miles) or after washing/riding in rain. Adjust as needed.
Clutch Adjustment:
Check and adjust as needed, typically before every ride or every 300 km (200 miles).
Engine Oil Spec:
SAE 10W-30 API SG or higher (e.g., Yamalube 4).
Brake Fluid Spec:
DOT 3 or DOT 4 Hydraulic Brake Fluid.
Coolant Type:
N/A (Air-cooled engine)
Common Wear Items:
Clutch plates (due to aggressive riding), wheel bearings, brake pads, throttle cables, and drive chains are common wear items.
Carburetor Performance:
Carburetor jetting may need adjustment based on altitude and temperature; gumming of jets from infrequent use.
Suspension Bushings:
Fork seals and swingarm bushings can wear over time, leading to leaks or play.
Brand Focus:
Yamaha has a long-standing heritage in motorsports and off-road riding, known for producing reliable and performance-oriented motorcycles.
Tt-R Series Introduction:
The TT-R line was developed to offer accessible, user-friendly off-road bikes. The 125cc models are a cornerstone of this lineup, evolving from earlier models and catering to a growing demand for small-displacement trail bikes.
2004 Model Updates:
The 2004 model year saw the continued availability of the base TT-R125, the electric-start TT-R125E, the long-wheelbase TT-R125LW, and the long-wheelbase electric-start TT-R125LWE, offering riders choices based on their needs and experience.
Manufacturing Location:
Likely manufactured in Japan or other Yamaha global facilities.
Production Years:
The TT-R125 platform has been in production since 2000, with ongoing updates and variations.
