These are the known mechanical and performance specifications for your 2010 Kymco Straight 125 E3.
Basic Specs

Engine
Displacement124.60 ccm (7.60 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression9.2:1
Bore/Stroke50.8 x 61.5 mm (2.0 x 2.4 inches)
Valves/Cylinder
Fueling
IgnitionCDI
Exhaust
Lubrication
CoolingAir
Performance
Horespower7.20 HP (5.3  kW) 
Torque9.30 Nm (0.9 kgf-m or 6.9 ft.lbs) 
Top Speed
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity3.50 litres (0.92 gallons)
Emissions
Chassis
Frame TypePine under bone
Rake
Trail
Front SuspensionTelescopic fork
Front Travel
Rear SuspensionUnit swing
Rear Travel
Seat
Seat Height
Alt. Seat Height
Total Height
Total Length1,900 mm (74.8 inches)
Total Width
Ground Clearance107 mm (4.2 inches)
Wheelbase1,280 mm (50.4 inches)
Dry Weight107.0 kg (235.9 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre2.50-17 
Rear Tire/Tyre2.75-17 
Front BrakesSingle disc
Front Brake Diameter220 mm (8.7 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter110 mm (4.3 inches)
Wheels


Comments
Optional rear disk brake. Kymco is made by Kwang Yang Motor Company, Taiwan.