These are the known mechanical and performance specifications for your 2011 Tomberlin SDX-400 IRS ATV.
Basic Specs

Engine
Displacement352.00 ccm (21.48 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression9.8:1
Bore/Stroke80.0 x 70.0 mm (3.1 x 2.8 inches)
Valves/Cylinder
FuelingCarburettor. Keihin
IgnitionCDI
Exhaust
Lubrication
CoolingLiquid
Drivetrain
Gearbox
Final DriveBelt
Clutch
DrivelineIndependent Rear Suspension. Shift-on-the-Fly 4-Wheel Drive. Hi/Lo Automatic CVT
Performance
Horespower
Torque26.98 Nm (2.8 kgf-m or 19.9 ft.lbs)
Top Speed
Chassis
Frame Type
Rake
Trail
Front SuspensionMcPherson Strut
Front Travel
Rear SuspensionDual-A Arm
Rear Travel
Seat
Seat Height
Alt. Seat Height
Total Height1,199 mm (47.2 inches)
Total Length2,111 mm (83.1 inches)
Total Width1,140 mm (44.9 inches)
Ground Clearance
Wheelbase1,280 mm (50.4 inches)
Dry Weight319.8 kg (705.0 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre25/8-12
Rear Tire/Tyre25/10-12
Front BrakesSingle disc. Hydraulic
Front Brake Diameter
Rear BrakesSingle disc. Hydraulic
Rear Brake Diameter
Wheels
Comments
Winch