These are the known mechanical and performance specifications for your 2010 Derbi GPR 50 2T.
Basic Specs

Engine
Displacement49.90 ccm (3.04 cubic inches)
Type
DetailsSingle cylinder, two-stroke
Max RPM
Compression11.5:1
Bore/Stroke39.9 x 40.0 mm (1.6 x 1.6 inches)
Valves/Cylinder
FuelingCarburettor. 17.5 mm
IgnitionC.D.I.
Exhaust
LubricationOil pump
CoolingLiquid
Performance
Horespower
Torque5.90 Nm (0.6 kgf-m or 4.4 ft.lbs)
Top Speed
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity13.00 litres (3.43 gallons)
Emissions
Chassis
Frame TypeTubular steel cradle
Rake
Trail
Front Suspension40 mm. hydraulic fork.
Front Travel110 mm (4.3 inches)
Rear SuspensionMonoshock.
Rear Travel120 mm (4.7 inches)
Seat
Seat Height
Alt. Seat Height
Total Height1,116 mm (43.9 inches)
Total Length2,015 mm (79.3 inches)
Total Width720 mm (28.3 inches)
Ground Clearance
Wheelbase1,360 mm (53.5 inches)
Dry Weight110.0 kg (242.5 pounds)
Wet Weight124.0 kg (273.4 pounds)
Wheels & Brakes
Front Tire/Tyre100/80-17
Rear Tire/Tyre130/70-17
Front BrakesSingle disc
Front Brake Diameter300 mm (11.8 inches)
Rear BrakesSingle disc
Rear Brake Diameter218 mm (8.6 inches)
Wheels
Comments
Made in Spain