Segment:
Entry-level to intermediate off-road/trail motorcycle
Key Competitors:
Honda CRF125F, Kawasaki KLX125L, Suzuki DR-Z125L
Model Appeal:
Durable, user-friendly, accessible trail bike suitable for learning and recreational riding.
Manual Purpose:
Empower owners and technicians with the knowledge to maintain and repair the Yamaha TTR125 for optimal performance and longevity.
Primary Coverage:
Complete Workshop Service and Repair
Secondary Coverage:
Maintenance, Diagnostics, Troubleshooting, Reassembly
Type:
Workshop Service Repair Manual
Format:
Digital Download (PDF)
File Type:
Portable Document Format (PDF)
Quality:
High-resolution scans of original factory documentation, ensuring clarity of text and diagrams.
Binding:
N/A (Digital Download)
Paper Type:
N/A (Digital Download)
Engine:
Complete overhaul, top-end rebuild, bottom-end assembly, valve adjustment, piston/ring replacement, cylinder inspection, cam chain replacement, timing procedures.
Fuel System:
Carburetor disassembly, cleaning, adjustment (jetting, float level), fuel petcock operation, fuel line inspection.
Ignition System:
CDI unit, spark plug diagnosis, stator coil testing, wiring diagrams for ignition circuit.
Cooling System:
Air cooling system component inspection and maintenance (no liquid cooling for this model).
Transmission:
Gearbox disassembly, inspection, reassembly, clutch operation, shift drum and lever maintenance.
Chassis And Suspension:
Front fork servicing (oil change, seal replacement, spring inspection), rear shock absorber inspection, swingarm and linkage lubrication, bearing checks.
Brakes:
Front and rear brake lever and pedal adjustment, brake pad inspection and replacement, brake shoe adjustment (rear drum), brake line inspection.
Electrical System:
Wiring diagrams, lighting system (headlight, taillight, brake light), horn operation, battery maintenance, charging system (stator, rectifier/regulator) testing.
Exhaust System:
Muffler and exhaust pipe inspection for damage and leaks.
Bodywork And Frame:
Plastic panel removal and installation, seat assembly, frame inspection for damage or bends.
Maintenance:
Oil change, filter cleaning/replacement, spark plug replacement, air filter cleaning, chain adjustment, lubrication points, brake adjustment, battery care.
Troubleshooting:
Diagnostic charts for common starting, running, and electrical issues. Symptom-based troubleshooting guides.
Repair:
Step-by-step instructions for engine disassembly and reassembly, transmission rebuild, suspension overhaul, brake system service, electrical component replacement.
Technical Specifications:
Torque specifications for all fasteners, valve clearance settings, ignition timing parameters, fluid capacities, and recommended fluid types.
Depth Level:
Comprehensive (from basic checks to full engine rebuilds)
Type:
4-stroke, SOHC, 2-valve
Bore X Stroke:
54 mm x 54.5 mm
Cooling Method:
Forced Air Cooling
Starter System:
Kick starter (standard on TTR125L), Electric starter (standard on TTR125E)
Estimated Horsepower:
Approx. 10-12 HP (factory estimate, may vary)
Estimated Torque:
Approx. 7-8 lb-ft (factory estimate, may vary)
Carburetor Type:
Mikuni VM20 (for TTR125L) or VM22 (for TTR125E)
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
1.6 US gallons (6.0 liters)
Overall Length:
75.4 inches (1915 mm) for TTR125L / 77.4 inches (1965 mm) for TTR125E
Overall Width:
31.5 inches (800 mm)
Overall Height:
43.5 inches (1105 mm) for TTR125L / 45.9 inches (1165 mm) for TTR125E
Seat Height:
31.7 inches (805 mm) for TTR125L / 32.7 inches (830 mm) for TTR125E
Wheelbase:
50.4 inches (1280 mm) for TTR125L / 52.0 inches (1320 mm) for TTR125E
Dry Weight:
Approx. 231 lbs (105 kg) for TTR125L / Approx. 238 lbs (108 kg) for TTR125E
Curb Weight:
Not specified, but typically ~15-20 lbs more than dry weight
Engine Oil Change:
Every 1,000 km (600 miles) or 6 months, whichever comes first.
Air Filter Cleaning:
Every 500 km (300 miles) or 3 months, clean more frequently in dusty conditions.
Spark Plug Replacement:
Every 3,000 km (1,800 miles) or annually.
Valve Clearance Check:
Every 3,000 km (1,800 miles) or annually.
Chain Lubrication And Adjustment:
Every 300 km (180 miles) or after washing/riding in wet conditions.
Engine Oil Type:
Yamalube 4 (or equivalent) SAE 10W-40 API SE, SF, SG, SH, SJ or higher
Engine Oil Capacity:
0.95 liters (1.0 US qt) without oil filter change; 1.0 liter (1.1 US qt) with oil filter change.
Fork Oil Type:
Yamaha Suspension Oil (or equivalent) SAE 10W
Fork Oil Capacity:
Approximately 292 ml (0.31 US qt) per fork leg.
Carburetor Fouling:
Occasional fouling of the carburetor jets due to fuel quality or infrequent use, leading to hard starting or poor running.
Suspension Wear:
Front fork seals can wear over time, leading to oil leaks. Rear shock absorber damping may degrade with extensive use.
Chain And Sprocket Wear:
Regular adjustment and lubrication are crucial to prevent premature wear of the drive chain and sprockets.
Yamaha Legacy:
Yamaha has a long-standing reputation for producing reliable and performance-oriented motorcycles across various disciplines, including off-road.
Ttr Series:
The TTR series is Yamaha's line of trail-ready four-stroke motorcycles, known for their usability and durability. The TTR125 was introduced to cater to younger riders and beginners, offering a user-friendly package with both kick-start and electric-start options available.
Production Years:
The TTR125 model line has been in production for many years, with the 2007 model being a specific iteration within this lineage.
