Market Segment:
Entry-level to intermediate off-road motorcycle for youth and smaller riders.
Target Audience:
Young riders, novice off-road enthusiasts, pit bike users.
Key Competitors:
Honda CRF100F/XR100R, Kawasaki KLX110, Suzuki DR-Z125.
Engine Type:
Air-cooled, four-stroke, SOHC.
Transmission Type:
Constant-mesh 5-speed with automatic clutch.
Suspension Features:
Monoshock rear suspension (unique for its class at the time, especially on LW model).
Model Variants:
Standard TT-R125(R) and TT-R125LW(R) (Long Wheelbase) offering different seat heights and suspension travel.
Coverage Scope:
Comprehensive factory service and repair
Specific Models Covered:
2003 Yamaha TT-R125(R) and TT-R125LW(R)
Estimated Page Count:
300-400 (typical for this era and model complexity)
Manual Type:
Factory Service Repair Workshop Manual
Format:
Digital (likely PDF) or Printed
Engine Service:
Complete overhaul, diagnosis, and repair procedures for the 125cc engine.
Transmission Service:
Clutch, gearbox, and final drive maintenance and repair.
Chassis And Suspension:
Front forks (including telescopic), rear shock absorber, swingarm, and linkage service.
Brake System:
Front and rear brake caliper, master cylinder, and linkage service.
Electrical System:
Wiring diagrams, ignition system, lighting, battery, charging system, and troubleshooting.
Fuel System:
Carburetor removal, cleaning, adjustment, and replacement.
Cooling System:
Air-cooled system description and maintenance.
Exhaust System:
Muffler and exhaust pipe inspection and replacement.
Frame And Bodywork:
Frame inspection, plastic body panel removal and installation.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, valve clearance checks, spark plug replacement.
Troubleshooting:
Diagnostic procedures for common starting, running, and electrical issues.
Engine Rebuild:
Detailed steps for piston, ring, cylinder, crankshaft, and bearing replacement.
Suspension Overhaul:
Fork seal replacement, shock absorber service, and linkage bearing inspection.
Brake Bleeding:
Procedure for bleeding hydraulic brake systems.
Carburetor Adjustment:
Idle speed and mixture adjustments.
Wheel And Tire Service:
Tire replacement and wheel bearing checks.
Depth Level:
Factory-level detailed technical information, suitable for mechanics and advanced DIY enthusiasts.
Diagnostic Tools:
Includes specifications for specialized tools and their usage.
File Format:
PDF (Assumed for digital product)
Searchability:
Searchable text content (if digitally produced)
Print Quality:
High-resolution illustrations and clear text (typical of factory manuals)
Binding Type:
Stapled/Perfect Bound (for printed) or Digital Access
Paper Type:
Durable, often glossy paper for printed versions
Engine Type:
Air-cooled, four-stroke, SOHC, 2-valve
Bore X Stroke:
54 x 54.5 mm
Horsepower:
Approx. 10-11 HP (estimated at crankshaft)
Torque:
Approx. 7-8 lb-ft (estimated at crankshaft)
Fuel Type:
Unleaded gasoline
Ignition System:
CDI (Capacitor Discharge Ignition)
Transmission Type:
Constant-mesh, 5-speed
Clutch Type:
Wet, multi-disc, automatic
Gear Ratios:
Specified in manual (e.g., 1st: 2.833, 2nd: 1.800, 3rd: 1.333, 4th: 1.091, 5th: 0.913)
Safety Rating:
N/A (Motorcycle safety is primarily based on design and rider skill)
Brakes:
Front disc brake, Rear drum brake.
Tires:
Knobby off-road tires for grip.
Chassis Design:
Durable steel frame for off-road use.
Engine Oil Change:
Every 1,000 km (600 miles) or 6 months.
Air Filter Cleaning:
Every 10 hours of use or monthly.
Chain Lubrication Adjustment:
Every 500 km (300 miles) or every ride.
Valve Clearance Check:
Every 6,000 km (3,600 miles) or annually.
Engine Oil Type:
Yamaha Hi-Tech 4-ATV SAE 10W-40 or equivalent API SG, SF, SE (refer to manual for precise specifications).
Engine Oil Capacity:
1.00 L (1.06 US qt) without filter change; 1.10 L (1.16 US qt) with filter change.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Common Wear Items:
Clutch plates, brake pads/shoes, chain and sprockets, tires.
Carburetor Gumming:
Can occur if fuel sits in carburetor for extended periods without stabilization.
Suspension Seals:
Fork seals can wear and leak over time with heavy use.
Brand Focus:
Yamaha has a long-standing reputation for producing reliable and performance-oriented motorcycles, particularly in the off-road segment.
Tt-R Lineage:
The TT-R line represents Yamaha's commitment to accessible off-road motorcycles, evolving from earlier TTR models with improved features and user-friendliness.
Production Period:
The TT-R125 model series has been in continuous production for many years, with the 2003 model being a significant iteration.
Industry Recognition:
The TT-R125 line has consistently been praised for its reliability, ease of use, and suitability for beginner riders in off-road publications.
User Ratings:
Generally high user satisfaction for its intended purpose and durability.
Emissions Certification:
Meets EPA standards for off-highway motorcycles (specific certifications vary by region).
