These are the known mechanical and performance specifications for your 2011 Suzuki ST 250E.
Basic Specs

Engine
Displacement249.00 ccm (15.19 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression9.2:1
Bore/Stroke72.0 x 61.2 mm (2.8 x 2.4 inches)
Valves/Cylinder2
FuelingCarburettor
IgnitionFull transistor type
ExhaustChrome-plated muffler
Lubrication
CoolingAir
Drivetrain
Gearbox5-speed
Final DriveChain
ClutchWet multi-plate coil spring
Driveline
Performance
Horespower18.77 HP (13.7 kW)
Torque21.00 Nm (2.1 kgf-m or 15.5 ft.lbs)
Top Speed
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity12.00 litres (3.17 gallons)
Emissions
Chassis
Frame Type
Rake25.0°
Trail92 mm (3.6 inches)
Front Suspension
Front Travel
Rear Suspension
Rear Travel
Seat
Seat Height770 mm (30.3 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,070 mm (42.1 inches)
Total Length2,070 mm (81.5 inches)
Total Width750 mm (29.5 inches)
Ground Clearance130 mm (5.1 inches)
Wheelbase1,375 mm (54.1 inches)
Dry Weight146.0 kg (321.9 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre90/90-18
Rear Tire/Tyre110/90-18
Front BrakesSingle disc
Front Brake Diameter
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter
WheelsChrome plated wheel rims and spokes,
Comments
Mainly sold in the Asian market.