These are the known mechanical and performance specifications for your 2012 GAS GAS EC 250 F.
Basic Specs

Engine
Displacement249.60 ccm (15.23 cubic inches)
TypeYamaha engine
DetailsSingle cylinder, four-stroke
Max RPM
Compression
Bore/Stroke77.0 x 53.6 mm (3.0 x 2.1 inches)
Valves/Cylinder5
FuelingCarburettor. Keihin FCR-MX37 
Ignition
Exhaust
Lubrication2% mixture.
CoolingLiquid
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity6.30 litres (1.66 gallons)
Emissions
Chassis
Frame TypeChrom-Molybdenum frame with B-profil
Rake
Trail
Front SuspensionMarzocchi ø48 mm inverted front fork with closed cartridge 
Front Travel295 mm (11.6 inches)
Rear SuspensionÖhlins hydraulic mono-shock absorber
Rear Travel298 mm (11.7 inches)
Seat
Seat Height940 mm (37.0 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,260 mm (49.6 inches)
Total Length2,200 mm (86.6 inches)
Total Width830 mm (32.7 inches)
Ground Clearance
Wheelbase1,490 mm (58.7 inches)
Dry Weight110.0 kg (242.5 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre90/90-21 
Rear Tire/Tyre140/80-18 
Front BrakesSingle disc. Galfer wave  disc, 2-piston nissin brake caliper 
Front Brake Diameter260 mm (10.2 inches)
Rear BrakesSingle disc. Galfer wave disc, 1-piston nissin brake caliper 
Rear Brake Diameter220 mm (8.7 inches)
WheelsLight aluminium spoke rim 


Comments
Spanish brand.