Market Position:
The TT-R125 series represents Yamaha's entry-level to intermediate off-road/trail motorcycle, aimed at younger riders or those seeking a fun, accessible, and reliable trail bike.
Competitive Analysis:
Competes directly with models like the Honda CRF100F/XR100, Kawasaki KLX110/125, and Suzuki DR-Z125. The TT-R125 is often praised for its torquey engine and robust build.
Key Features:
User-friendly power delivery, adjustable suspension (depending on variant), durable chassis, electric start (ES/LES variants), reliable air-cooled engine.
Coverage Areas:
Comprehensive coverage for 2004 Yamaha TT-R125S, ES, LS, LES models, including maintenance, repair, diagnostics, and troubleshooting.
Page Count:
Detailed page count not specified in product information, but implied to be comprehensive like a dealership manual.
Manual Type:
Owner's Manual / Motorcycle Service Repair Manual
Manual Classification:
Professional workshop manual with owner's information integrated.
Language:
English (typical for US market manuals)
Format:
Digital (likely PDF), bookmarked, zoomable, printable
Systems Covered:
Engine, fuel system, ignition system, electrical system, transmission, clutch, drivetrain, suspension, steering, brakes, frame, wheels, tires, bodywork, lubrication, cooling.
Electrical System Details:
Wiring diagrams, component testing (stator, CDI, ignition coil, lights if equipped), battery maintenance and testing, starter motor (ES/LES models).
Procedures Included:
Routine maintenance, scheduled servicing, complete disassembly and reassembly of major components, troubleshooting guides, diagnostic procedures, electrical system testing, carburetor tuning, suspension adjustments, brake bleeding, wheel bearing service, chain adjustment, oil changes, filter replacements.
Carburetor Overhaul:
Detailed steps for disassembly, cleaning, inspection, and reassembly of the carburetor, including jetting recommendations for different altitudes.
Suspension Service:
Front fork oil change and seal replacement, rear shock absorber inspection and basic maintenance procedures.
Wheel And Tire Service:
Tire changing, tube replacement, spoke tension adjustment, wheel bearing inspection and lubrication.
Technical Depth:
Factory-level technical depth, suitable for dealership technicians and experienced DIY mechanics. Includes detailed diagrams, torque specifications, and component testing procedures.
Torque Specifications:
Comprehensive list of all critical torque values for fasteners, including engine, chassis, and suspension components.
Troubleshooting Charts:
Diagnostic flowcharts for common problems such as starting issues, poor running conditions, and electrical faults.
File Format:
Digital (PDF). Optimized for clarity and zoomability without pixelation.
Print Quality:
High-resolution digital images and text, allowing for clear printing of all diagrams and instructions.
Binding Type:
Not applicable for digital format. For physical manuals, typically a saddle-stitched or perfect-bound format.
Paper Type:
Not applicable for digital format. For physical manuals, typically a durable, matte finish paper suitable for workshop environments.
Engine Type:
Air-cooled, 4-stroke, SOHC, 2-valve single-cylinder
Displacement:
124cc (approx.)
Bore X Stroke:
Typically 54.0 mm x 54.5 mm (verify specific engine code)
Valve Clearance Spec:
Intake: 0.08 - 0.13 mm (0.003 - 0.005 in), Exhaust: 0.13 - 0.18 mm (0.005 - 0.007 in). (Verify in manual).
Horsepower:
Estimated 10-12 HP (at crankshaft, dependent on tuning and exhaust)
Torque:
Estimated 7-9 lb-ft (at crankshaft, dependent on tuning and exhaust)
Compression Ratio:
Approximately 9.5:1
Fuel Delivery:
Carburetor (likely a Mikuni VM20 or similar)
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
Approximately 1.6 gallons (6.0 liters)
Overall Length:
Approximately 72.7 inches (1845 mm)
Overall Width:
Approximately 31.7 inches (805 mm)
Overall Height:
Approximately 43.7 inches (1110 mm)
Seat Height:
Approximately 31.5 inches (800 mm) for standard, 33.5 inches (850 mm) for LS
Wheelbase:
Approximately 49.2 inches (1250 mm)
Ground Clearance:
Approximately 11.2 inches (285 mm)
Dry Weight:
Approximately 170 lbs (77 kg) for S/ES, 174 lbs (79 kg) for LS/LES
Wet Weight:
Estimated 180-185 lbs (82-84 kg) with fluids
Max Load Capacity:
Not explicitly specified, but designed for a single rider and light off-road use.
Safety Ratings:
As a closed-course off-road motorcycle, formal safety ratings like NCAP are not applicable. Focus is on rider control and durability.
Active Features:
Responsive braking system (drum front/rear on S/ES, disc front/drum rear on LS/LES), predictable handling characteristics, appropriate tire selection for off-road use.
Passive Features:
Robust frame construction, protective bodywork, handlebars with protective grips, rider footpegs.
Engine Oil Change Interval:
Recommended every 1,000 km (600 miles) or 6 months, whichever comes first. (Verify specific interval in manual).
Air Filter Cleaning Interval:
Every 500 km (300 miles) or as needed based on operating conditions. (Verify specific interval in manual).
Spark Plug Replacement Interval:
Recommended every 3,000 km (1,800 miles). (Verify specific interval in manual).
Engine Oil Type:
Yamaha genuine 4-stroke motorcycle oil or equivalent API SG type or higher, SAE 10W-40 or 10W-50 recommended. (Verify in manual).
Transmission Oil Type:
Same as engine oil (shared sump).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid (for disc brake models, if applicable).
Clutch Fluid Type:
Engine oil (shared sump).
Known Issues:
Common issues can include carburetor jetting sensitivity to altitude and modifications, chain wear, and occasional electrical gremlins if neglected. Suspension may benefit from upgrades for more aggressive riding.
Maintenance Tip:
Regular cleaning of the air filter is crucial for optimal performance and engine longevity in dusty off-road conditions.
Common Repair:
Carburetor cleaning and re-jetting, valve adjustments, chain and sprocket replacement, fork seal replacement.
Brand Heritage:
Yamaha has a long and successful history in dirt biking and off-road racing, known for producing durable and performance-oriented motorcycles across various displacements.
Model Evolution:
The TT-R125 series was introduced in the early 2000s as a successor to older models, offering modern features like electric start on some variants and improved suspension. It has remained a popular choice for its class.
Production Years:
The TT-R125 line has been in continuous production since its introduction, with minor updates over the years.
Recognitions:
While specific awards for the 2004 model are not readily documented, the TT-R125 line has consistently received positive reviews from enthusiasts and industry publications for its user-friendliness and durability in its class.
Enthusiast Ratings:
Consistently rated highly by riders for its ease of use, reliability, and fun factor on trails and for beginner riders.
Certifications:
Meets all applicable EPA emissions standards for off-highway motorcycles.
