At the heart of the 2007 Yamaha YBR 125 sport motorcycle, Yamaha utilizes a 124 cc (7.6 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 10.1 HP (7.3 kW) at 10,000 rpm while maximum torque reaches 9.6 Nm (7.1 lb-ft) at 6,100 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 81.5 HP per liter and a 3,900 rpm working window between peak torque (6,100 rpm) and peak power (10,000 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 YBR 125 measures 113 kg (249 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (11.19 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,290 mm (50.8 in) wheelbase engineered for quick, flickable steering geometry. The 12-liter (3.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Yamaha archive, this model family spans 4 indexed model years from 2005 to 2010, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
81.5 HP/L
Power-to-Weight
0.09 HP/kg (11.19 kg/HP)
Power Band Window
6,100–10,000 rpm
Standover Height
780 mm (30.7 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsIn-line four, four-stroke
Power10.1 HP (7.3 kW)) @ 10000 RPM
Torque9.6 Nm (1.0 kgf-m or 7.1 ft.lbs) @ 6100 RPM
Compression10.0:1
Bore x Stroke54.0 x 54.0 mm (2.1 x 2.1 inches)
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionCDI
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Chassis
Frame TypeDiamond shaped
Front SuspensionTelescopic forks
Front Travel120 mm (4.7 inches)
Rear SuspensionSwingarm
Rear Travel200 mm (7.9 inches)
Wheelbase1290 mm (50.8 inches)
Ground Clearance175 mm (6.9 inches)
Wheels & Brakes
Front Tyre90/90-M21
Rear Tyre90/90-M18
Front BrakesSingle disc
Front Brake Ø245 mm (9.6 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø130 mm (5.1 inches)
Dimensions & Weight
Dry Weight113.0 kg (249.1 pounds)
Power/Weight0.0889 HP/kg
Seat Height780 mm (30.7 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.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
