At the heart of the 2004 Yamaha TT-R125 enduro - offroad motorcycle, Yamaha pairs a 123.7 cc (7.6 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 9.7 HP (7 kW) at 8,000 rpm while maximum torque reaches 9.9 Nm (7.3 lb-ft) at 6,500 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 78.4 HP per liter and a 1,500 rpm working window between peak torque (6,500 rpm) and peak power (8,000 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the TT-R125 measures 84 kg (185 lbs) dry, translating to a power-to-weight ratio of 0.12 HP/kg (8.66 kg per horsepower). Rider ergonomics and chassis geometry center around a 775 mm (30.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,250 mm (49.2 in) wheelbase engineered for quick, flickable steering geometry.
Within MotoLibrary's Yamaha archive, this model family spans 7 indexed model years from 2004 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
78.4 HP/L
Power-to-Weight
0.12 HP/kg (8.66 kg/HP)
Power Band Window
6,500–8,000 rpm
Standover Height
775 mm (30.5 in)
Engine
Displacement123.7 ccm (7.55 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power9.7 HP (7.0 kW)) @ 8000 RPM
Torque9.9 Nm (1.0 kgf-m or 7.3 ft.lbs) @ 6500 RPM
Compression10.0:1
Bore x Stroke54.0 x 54.0 mm (2.1 x 2.1 inches)
Fuel ControlSingle Overhead Cams (SOHC)
CoolingAir
Transmission
Final DriveChain (final drive)
Chassis
Frame TypeFront suspension system
Front SuspensionTelescopic fork
Front Travel180 mm (7.1 inches)
Rear SuspensionSwinging arm (monocross)
Rear Travel160 mm (6.3 inches)
Wheelbase1250 mm (49.2 inches)
Ground Clearance265 mm (10.4 inches)
Wheels & Brakes
Front Tyre70/100-17
Rear Tyre90/100-14
Front BrakesExpanding brake (drum brake)
Front Brake Ø110 mm (4.3 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø110 mm (4.3 inches)
Dimensions & Weight
Dry Weight84.0 kg (185.2 pounds)
Power/Weight0.1149 HP/kg
Seat Height775 mm (30.5 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
