Target Audience:
Owners, mechanics, and enthusiasts seeking detailed repair and maintenance information for the Yamaha TT-R125/L.
Value Proposition:
Provides dealership-level technical data, enabling comprehensive and accurate servicing, directly mirroring factory service procedures.
Unique Selling Points:
Authentic Yamaha dealership-level documentation, extensive troubleshooting guides, detailed diagrams and illustrations.
Engine Mechanical:
Complete teardown, inspection, and reassembly procedures for engine components.
Engine Electrical:
Ignition system, CDI unit, stator, wiring diagrams, troubleshooting.
Fuel System:
Carburetor disassembly, cleaning, adjustment, fuel tank and petcock service.
Transmission:
Gearbox disassembly, inspection, repair, clutch assembly and service.
Chassis Suspension:
Front fork service (oil change, seal replacement), rear shock absorber service, linkage maintenance.
Brakes:
Front and rear brake system service, hydraulic system bleeding, pad replacement, caliper service.
Wheels Tires:
Wheel bearing inspection and replacement, spoke tensioning, tire mounting and balancing.
Electrical System:
Lighting, horn, battery, wiring harnesses, fuse box.
Frame Bodywork:
Frame inspection, plastic body panel removal and installation, seat service.
Maintenance:
Regular scheduled maintenance, oil changes, filter replacements, lubrication.
Troubleshooting:
Diagnostic procedures for common operational issues and electrical faults.
Repair:
Detailed step-by-step instructions for component repair and replacement.
Rebuild:
Engine and transmission rebuild procedures, including specifications for critical components.
Specifications:
Torque specifications, clearances, fluid capacities, and other critical data.
Depth:
Comprehensive: Suitable for dealership technicians and experienced DIY mechanics.
Engine Type:
4-stroke, SOHC, air-cooled
Displacement:
124 cc (7.57 cu. in.)
Bore X Stroke:
54.0 mm x 54.5 mm (2.13 in x 2.15 in)
Valve Clearance Intake:
0.05 - 0.09 mm (0.002 - 0.004 in)
Valve Clearance Exhaust:
0.05 - 0.09 mm (0.002 - 0.004 in)
Horsepower Approx:
Approx. 10-12 HP (specific rating may vary)
Torque Approx:
Approx. 7-8 lb-ft (specific rating may vary)
Carburetor Model:
Mikuni VM20SS
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
2.6 L (0.69 US gal)
Engine Oil Type:
Yamalube 4 (SAE 10W-30)
Engine Oil Capacity W Filter:
0.90 L (0.95 US qt)
Engine Oil Capacity Wo Filter:
0.80 L (0.85 US qt)
Safety Standards:
Designed to meet applicable off-road safety regulations, though specific crash ratings are not applicable to this class of vehicle.
Braking System:
Hydraulic disc brakes front and rear for enhanced stopping power.
Frame Construction:
Steel semi-double cradle frame for stability and durability.
Lighting:
Headlight and taillight for visibility, essential for safe operation.
Features:
This model is a basic off-road motorcycle and does not feature modern infotainment systems. Focus is on mechanical function and rider control.
Features:
No electronic rider assistance systems (e.g., ABS, traction control) are present on this model.
Features:
No connectivity features are present on this model.
Engine Oil Change:
Every 1,000 km (600 miles) or 6 months, whichever comes first. More frequent changes recommended for severe use.
Air Filter Cleaning:
Every 500 km (300 miles) or annually. Clean more often in dusty conditions.
Spark Plug Inspection:
Every 1,000 km (600 miles) or annually.
Valve Clearance Check:
Every 4,000 km (2,500 miles) or annually.
Brake Fluid Change:
Every 2 years or as needed.
Fork Oil Type:
Yamaha Suspension Oil 10W or equivalent.
Fork Oil Capacity Per Leg:
Refer to manual for exact amount, typically around 300-350 ml.
Carburetor Fouling:
Common for small-displacement dirt bikes, especially if left sitting with fuel. Requires regular cleaning and proper fuel stabilizer usage.
Clutch Wear:
Clutch plates can wear over time with aggressive riding, requiring replacement. Manual provides adjustment and replacement procedures.
Suspension Seals:
Fork seals can develop leaks, especially under demanding off-road conditions. Manual details seal replacement.
Yamaha Offroad:
Yamaha has a long-standing reputation for producing high-performance and reliable off-road motorcycles, including championship-winning motocross and enduro models.
Tt-R Lineage:
The TT-R line represents Yamaha's commitment to the entry-level and intermediate off-road market, offering accessible performance and durability.
Manufacturing Location:
Typically manufactured in Japan or other Yamaha production facilities.
Production Years:
The TT-R125 was introduced in the late 1990s and continued through subsequent model years with minor updates.
