These are the known mechanical and performance specifications for your 2009 Skyteam ST250 SM.
Basic Specs

Engine
Displacement223.00 ccm (13.61 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression9.0:1
Bore/Stroke39.0 x 41.4 mm (1.5 x 1.6 inches)
Valves/Cylinder
Fueling
IgnitionCDI
Exhaust
LubricationPressure and splash lubricarion
CoolingAir
Performance
Horespower12.00 HP (8.8 kW)
Torque
Top Speed106.0 km/h (65.9 mph)
Fuel Economy & Polution
Fuel Consumption2.90 litres/100 km (34.5 km/l or 81.11 mpg)
Fuel Capacity10.00 litres (2.64 gallons)
Emissions67.3 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame Type
Rake
Trail
Front SuspensionSpring and oil
Front Travel
Rear SuspensionGas/monoshock
Rear Travel
Seat
Seat Height910 mm (35.8 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,230 mm (48.4 inches)
Total Length2,150 mm (84.6 inches)
Total Width830 mm (32.7 inches)
Ground Clearance
Wheelbase
Dry Weight123.0 kg (271.2 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre100/90-10
Rear Tire/Tyre120/90-10
Front BrakesSingle disc
Front Brake Diameter
Rear BrakesSingle disc
Rear Brake Diameter
Wheels
Comments
Made in China.