These are the known mechanical and performance specifications for your 2012 Lifan LF150-SJ II.
Basic Specs

Engine
Displacement149.00 ccm (9.09 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression9.1:1
Bore/Stroke57.3 x 57.3 mm (2.3 x 2.3 inches)
Valves/Cylinder
FuelingCarburettor
Ignition
Exhaust
Lubrication
CoolingAir
Performance
Horespower11.00 HP (8.0 kW)
Torque11.50 Nm (1.2 kgf-m or 8.5 ft.lbs)
Top Speed95.0 km/h (59.0 mph)
Fuel Economy & Polution
Fuel Consumption2.20 litres/100 km (45.5 km/l or 106.92 mpg)
Fuel Capacity13.00 litres (3.43 gallons)
Emissions51.0 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeSteel
Rake
Trail
Front SuspensionTelescopic hydraulic
Front Travel
Rear SuspensionDual shocks
Rear Travel
Seat
Seat Height770 mm (30.3 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,150 mm (45.3 inches)
Total Length2,150 mm (84.6 inches)
Total Width790 mm (31.1 inches)
Ground Clearance
Wheelbase1,285 mm (50.6 inches)
Dry Weight117.0 kg (257.9 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre
Rear Tire/Tyre
Front BrakesSingle disc. Optional drum
Front Brake Diameter
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter
WheelsBlack, five spoke aluminium alloy wheels.
Comments
Lifan is Chinese brand.