Target Audience:
Enthusiast riders, amateur mechanics, and professional service technicians working on the Yamaha TT-R125 series.
Segment:
Entry-level to intermediate youth off-road motorcycle segment.
Key Competitors:
Honda CRF100F/CRF125F, Kawasaki KLX110/KLX125, Suzuki DR-Z110/DR-Z125.
Manual Value Proposition:
Provides the definitive, factory-authorized guide for maintaining and repairing the 2005 TT-R125 models, ensuring accuracy and completeness for optimal performance and longevity.
Manual Coverage Scope:
Complete service and repair for all specified models and variants.
Geographic Coverage:
Global (based on factory specifications)
Estimated Page Count:
Refer to original factory document; typically 200-400 pages for comprehensive service manuals.
Manual Designation:
Factory Service Repair Manual
Purpose:
Diagnosis, repair, maintenance, and overhaul.
Language:
English (as per typical factory manuals for this market)
Delivery Format:
Downloadable Digital File
Engine Mechanical:
Detailed disassembly, inspection, repair, and reassembly of the engine, including cylinder head, pistons, crankshaft, connecting rod, valves, camshaft, timing, and lubrication system.
Fuel System:
Carburetor tuning, cleaning, and overhaul; fuel tank inspection and repair; fuel line routing and inspection.
Ignition System:
CDI unit testing, spark plug specifications, coil inspection, wiring diagrams.
Transmission Drivetrain:
Clutch operation, adjustment, and replacement; gearbox internal inspection and repair; chain and sprocket maintenance.
Suspension System:
Front fork disassembly, service, and reassembly; rear shock absorber inspection and service; linkage and pivot point lubrication.
Braking System:
Front and rear brake system maintenance, caliper overhaul, pad replacement, fluid bleeding, and component inspection.
Electrical System:
Wiring diagrams, component testing (lights, horn, battery), troubleshooting electrical faults.
Frame Chassis:
Frame inspection, handling of chassis components, steering bearing service.
Wheels Tires:
Tire pressure specifications, wheel bearing maintenance, spoke tensioning (if applicable).
Bodywork Trim:
Removal and installation of plastic body panels, seat, and fenders.
Maintenance Procedures:
Routine checks, lubrication points, filter replacement, spark plug gap adjustment, chain adjustment.
Repair Procedures:
Step-by-step instructions for component replacement and repair across all systems.
Troubleshooting Guide:
Diagnostic charts and common problem identification for various systems.
Torque Specifications:
Detailed torque values for critical fasteners throughout the motorcycle.
Special Tools:
Identification and use of specialized tools required for certain procedures.
Depth Of Coverage:
Comprehensive, covering everything from basic maintenance to complete engine and gearbox overhauls.
Diagnostic Capabilities:
Advanced diagnostics for electrical and mechanical issues, including component testing procedures.
Digital File Type:
PDF (Portable Document Format)
Searchability:
Likely searchable text-based PDF for efficient information retrieval.
Print Readability:
High quality, designed for clear reproduction of diagrams, text, and images.
Original Binding Type:
Original factory manual typically spiral-bound or perfect-bound for durability.
Original Paper Type:
Durable, high-quality paper suitable for workshop environments.
Engine Type:
Four-stroke, SOHC, air-cooled
Bore X Stroke:
54 mm x 54.5 mm
Valve Configuration:
2 valves (intake and exhaust)
Horsepower:
Approx. 10-12 HP (factory figures vary slightly by dyno/test conditions)
Torque:
Approx. 7-8 lb-ft (factory figures vary slightly)
Carburetor Model:
Mikuni VM20 (for TT-R125E/LWE) or similar VM series carb for TT-R125/LW
Fuel Type:
Unleaded gasoline (87 octane or higher)
Fuel Capacity:
1.6 US gallons (6.1 L)
Oil Capacity:
0.85 US quarts (0.8 L) with filter change
Recommended Oil Grade:
Yamaha Yamalube 4, SAE 10W-40 API SG or higher (check manual for specific approval)
Transmission Type:
5-speed constant mesh
Clutch Type:
Wet, multi-plate
Gear Ratios:
Specific ratios detailed in manual (e.g., 1st: 2.833, 2nd: 1.875, 3rd: 1.333, 4th: 1.091, 5th: 0.913)
Transmission Oil Capacity:
0.59 US quarts (0.56 L) (refer to manual for specific check procedure)
Recommended Transmission Oil:
Yamalube Gear Oil 80W API GL-4 or equivalent (check manual for specification)
Overall Length:
Approx. 1760 mm (69.3 in) for TT-R125
Overall Width:
Approx. 780 mm (30.7 in) for TT-R125
Overall Height:
Approx. 1045 mm (41.1 in) for TT-R125
Seat Height:
Approx. 790 mm (31.1 in) for TT-R125
Wheelbase:
Approx. 1275 mm (50.2 in) for TT-R125
Ground Clearance:
Approx. 305 mm (12.0 in) for TT-R125
Front Tire Size:
2.50-17 4PR (TT-R125/LW), 70/100-17 (TT-R125E/LWE)
Rear Tire Size:
3.00-14 6PR (TT-R125/LW), 90/100-14 (TT-R125E/LWE)
Wheel Type:
Spoked wheels
Wheelbase Variant:
LW and LWE models have longer wheelbases for increased stability (approx. 1300mm / 51.2in).
Dry Weight:
Approx. 92 kg (203 lbs) for TT-R125
Wet Weight:
Approx. 95 kg (209 lbs) (with all fluids)
Gvw Rating:
Not typically specified for off-road motorcycles; refer to manual for load limits.
Crash Test Ratings:
Not applicable (motorcycle, not tested by agencies like NHTSA/IIHS).
Braking System Design:
Hydraulic front disc brake, mechanical rear drum brake (TT-R125/LW) or hydraulic rear disc brake (TT-R125E/LWE).
Lighting System:
Headlight, taillight, brake light.
Frame Construction:
Steel diamond-type frame providing structural integrity.
Oil Change Interval:
Every 1000 km (600 miles) or 6 months (refer to manual for exact schedule).
Air Filter Cleaning:
Every 1000 km (600 miles) or more frequently in dusty conditions.
Spark Plug Check:
Every 1000 km (600 miles) or annually.
Valve Clearance Check:
Every 6000 km (3700 miles) or 24 months.
Coolant Type:
N/A (Air-cooled engine)
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid (refer to manual for exact specification).
Common Wear Items:
Clutch plates, brake pads, chain and sprockets, air filter, carburetor jets, fork seals.
Potential Problems:
Carburetor clogging due to infrequent use or poor fuel quality, worn valve guides/seals, starter clutch wear on electric start models.
Yamaha Legacy:
Yamaha has a long-standing reputation for producing high-quality, reliable motorcycles, particularly in off-road disciplines.
Tt-R Lineage:
The TT-R line is Yamaha's dedicated range of four-stroke trail and dirt bikes, known for their user-friendliness and durability. The 125cc models cater to younger riders and beginners.
Model Introduction:
The TT-R125 was introduced in the early 2000s as a successor to smaller displacement two-stroke offerings and older four-stroke models.
Production Period:
The TT-R125 series has been in continuous production for many years, with model updates and variations like the electric start (E) and larger wheel (LW) versions.
