At the heart of the 2011 Derbi Mulhacen 125 naked motorcycle, Derbi utilizes a 124.2 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 15 HP (10.9 kW) at 9,250 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 120.8 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the Mulhacen 125 measures 124 kg (273 lbs) wet (curb), translating to a power-to-weight ratio of 0.12 HP/kg (8.27 kg per horsepower). Rider ergonomics and chassis geometry center around a 750 mm (29.5 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,326 mm (52.2 in) wheelbase engineered for quick, flickable steering geometry. The 11-liter (2.9 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Derbi archive, this model family spans 5 indexed model years from 2008 to 2012, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
120.8 HP/L
Power-to-Weight
0.12 HP/kg (8.27 kg/HP)
Standover Height
750 mm (29.5 in)
Engine
Displacement124.2 ccm (7.58 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power15.0 HP (10.9 kW)) @ 9250 RPM
Compression12.0:1
Bore x Stroke58.0 x 47.0 mm (2.3 x 1.9 inches)
Valves/Cylinder4
Fuel SystemCarburettor. 30 mm
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
LubricationDry sump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchMulti-plate in oil bath
Performance
Emission DetailsEuro 3
Chassis
Frame TypeTubular High Tensile Steel
Front Suspension37 hydraulic fork.
Front Travel130 mm (5.1 inches)
Rear SuspensionMono-shock
Rear Travel130 mm (5.1 inches)
Wheelbase1326 mm (52.2 inches)
Wheels & Brakes
Front Tyre100/90-18
Rear Tyre130/80-17
Front BrakesSingle disc
Front Brake Ø280 mm (11.0 inches)
Rear BrakesSingle disc
Rear Brake Ø218 mm (8.6 inches)
Dimensions & Weight
Dry Weight110.0 kg (242.5 pounds)
Weight incl.124.0 kg (273.4 pounds)
Power/Weight0.1364 HP/kg
Seat Height750 mm (29.5 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.
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.
