Built around Yamaha's custom - cruiser motorcycle platform, the 2009 Yamaha YBR125 Custom relies on a 124 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. 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), 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, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the YBR125 Custom measures 129 kg (284 lbs) wet (curb), translating to a power-to-weight ratio of 0.08 HP/kg (12.77 kg per horsepower). Rider ergonomics and chassis geometry center around a 760 mm (29.9 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, 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 9 indexed model years from 2008 to 2017, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
81.5 HP/L
Power-to-Weight
0.08 HP/kg (12.77 kg/HP)
Standover Height
760 mm (29.9 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power10.1 HP (7.3 kW)) @ 10000 RPM
Torque9.6 Nm (1.0 kgf-m or 7.1 ft.lbs)
Compression10.0:1
Bore x Stroke54.0 x 54.0 mm (2.1 x 2.1 inches)
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionTCI
LubricationWet sump
CoolingAir
Transmission
Gearbox5-speed
Final DriveChain (final drive)
ClutchWet, multiple disc
Chassis
Frame TypeDiamond shaped
Trail102 mm (4.0 inches)
Front SuspensionTelescopic forks
Front Travel110 mm (4.3 inches)
Rear SuspensionSwingarm
Rear Travel105 mm (4.1 inches)
Wheelbase1290 mm (50.8 inches)
Ground Clearance140 mm (5.5 inches)
Wheels & Brakes
Front Tyre3.00-18
Rear Tyre3.50-16
Front BrakesSingle disc
Front Brake Ø245 mm (9.6 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø130 mm (5.1 inches)
Dimensions & Weight
Weight incl.129.0 kg (284.4 pounds)
Seat Height760 mm (29.9 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.
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.
