These are the known mechanical and performance specifications for your 2017 GAS GAS TXT Racing 300 E4.
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. Keihin PWK 28. Intake by reed valve.
IgnitionCDI
Exhaust
Lubrication2.5 % Mixture
CoolingLiquid
Drivetrain
Gearbox6-speed
Final DriveChain
ClutchGG 1/3 hydraulic-diaphragm-system
Driveline
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity2.40 litres (0.63 gallons)
Emissions
Chassis
Frame TypeChrom-Molybdenum tubular frame
Rake
Trail
Front SuspensionTECH with aluminium bar Ø 39
Front Travel180 mm (7.1 inches)
Rear SuspensionReiger hydraulic mono shock absorber (2 ways). Rebound and spring pre-load ajustable.
Rear Travel164 mm (6.5 inches)
Seat
Seat Height630 mm (24.8 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,130 mm (44.5 inches)
Total Length2,010 mm (79.1 inches)
Total Width825 mm (32.5 inches)
Ground Clearance
Wheelbase1,320 mm (52.0 inches)
Dry Weight67.5 kg (148.8 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre2.75-21
Rear Tire/Tyre4.00-18
Front BrakesSingle disc. Floating wave discs. Four-piston calipers.
Front Brake Diameter185 mm (7.3 inches)
Rear BrakesSingle disc. Two-piston calipers.
Rear Brake Diameter150 mm (5.9 inches)
WheelsAluminium rims, wire spoked
Comments
Spanish bike.