Engineered by Derbi for the sport motorcycle segment, the 2011 Derbi GPR 50 2T relies on a 49.9 cc (3 cu in) liquid-cooled single cylinder, two-stroke powerplant. In factory specification, peak output is rated at 8.5 HP (6.2 kW) at 10,000 rpm while maximum torque reaches 5.9 Nm (4.4 lb-ft) at 9,000 rpm, transferring power to the rear wheel through a 6-speed gearbox. Internal engine geometry specifies a bore and stroke of 39.9 x 40.0 mm (1.6 x 1.6 inches) with a 11.5:1 compression ratio.
On the scales, the GPR 50 2T measures 110 kg (243 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.94 kg per horsepower). Rider ergonomics and chassis geometry center around a 810 mm (31.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,360 mm (53.5 in) wheelbase engineered for quick, flickable steering geometry. The 13-liter (3.4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Derbi archive, this model family spans 3 indexed model years from 2010 to 2012, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Power-to-Weight
0.08 HP/kg (12.94 kg/HP)
Power Band Window
9,000–10,000 rpm
Standover Height
810 mm (31.9 in)
Engine
Displacement49.9 ccm (3.04 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power8.5 HP (6.2 kW)) @ 10000 RPM
Torque5.9 Nm (0.6 kgf-m or 4.4 ft.lbs) @ 9000 RPM
Compression11.5:1
Bore x Stroke39.9 x 40.0 mm (1.6 x 1.6 inches)
Fuel SystemCarburettor. 17.5 mm
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionC.D.I.
LubricationOil pump
CoolingLiquid
Transmission
Gearbox6-speed
ClutchMulti-plate
Chassis
Frame TypeTubular steel cradle
Front Suspension40 mm. hydraulic fork.
Front Travel110 mm (4.3 inches)
Rear SuspensionMonoshock.
Rear Travel120 mm (4.7 inches)
Wheelbase1360 mm (53.5 inches)
Wheels & Brakes
Front Tyre100/80-17
Rear Tyre130/70-17
Front BrakesSingle disc
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc
Rear Brake Ø218 mm (8.6 inches)
Dimensions & Weight
Dry Weight110.0 kg (242.5 pounds)
Power/Weight0.0768 HP/kg
Seat Height810 mm (31.9 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.
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.
