These are the known mechanical and performance specifications for your 2010 GAS GAS TXT Pro 300 2T.
Basic Specs

Engine
Displacement294.10 ccm (17.95 cubic inches)
Type
DetailsSingle cylinder, two-stroke
Max RPM
Compression
Bore/Stroke79.0 x 60.0 mm (3.1 x 2.4 inches)
Valves/Cylinder
FuelingCarburettor. Dell´Orto PHBL26BS
IgnitionCDI
Exhaust
Lubrication
CoolingLiquid
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity2.50 litres (0.66 gallons)
Emissions
Chassis
Frame TypeCrMo
Rake
Trail
Front SuspensionMarzocchi fork
Front Travel
Rear SuspensionSachs monoshock
Rear Travel
Seat
Seat Height650 mm (25.6 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height
Total Length
Total Width825 mm (32.5 inches)
Ground Clearance
Wheelbase1,340 mm (52.8 inches)
Dry Weight67.0 kg (147.7 pounds)
Wet Weight69.0 kg (152.1 pounds)
Wheels & Brakes
Front Tire/Tyre2.75-21
Rear Tire/Tyre4.00-18
Front BrakesSingle disc. 4-piston
Front Brake Diameter185 mm (7.3 inches)
Rear BrakesSingle disc
Rear Brake Diameter150 mm (5.9 inches)
Wheels
Comments
Spanish made bike.