These are the known mechanical and performance specifications for your 2011 Yamaha XT250X.
Basic Specs

Engine
Displacement249.00 ccm (15.19 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression9.8:1
Bore/Stroke74.0 x 58.0 mm (2.9 x 2.3 inches)
Valves/Cylinder2
FuelingInjection
IgnitionCDI
Exhaust
LubricationPressurized wet sump
CoolingOil & air
Drivetrain
Gearbox5-speed
Final DriveChain
ClutchWet multi-plate coil spring
Driveline
Performance
Horespower21.00 HP (15.3 kW)
Torque21.00 Nm (2.1 kgf-m or 15.5 ft.lbs)
Top Speed
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity11.00 litres (2.91 gallons)
Emissions
Chassis
Frame Type
Rake
Trail
Front Suspension35mm telescopic fork, 240mm 9.4-in wheel travel
Front Travel
Rear SuspensionSwingarm w/rebound-adjustable single shock. 220mm 8.7-in wheel travel
Rear Travel
Seat
Seat Height790 mm (31.1 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,110 mm (43.7 inches)
Total Length2,040 mm (80.3 inches)
Total Width805 mm (31.7 inches)
Ground Clearance260 mm (10.2 inches)
Wheelbase1,365 mm (53.7 inches)
Dry Weight133.0 kg (293.2 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre110/70-17
Rear Tire/Tyre130/70-17
Front BrakesSingle disc
Front Brake Diameter245 mm (9.6 inches)
Rear BrakesSingle disc
Rear Brake Diameter203 mm (8.0 inches)
Wheels
Comments
Sold in Japan.