These are the known mechanical and performance specifications for your 2010 Derbi Boulevard 125 4T.
Basic Specs

Engine
Displacement124.00 ccm (7.57 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression10.6:1
Bore/Stroke57.0 x 48.6 mm (2.2 x 1.9 inches)
Valves/Cylinder2
FuelingCarburettor
Ignition
ExhaustEuro 3
LubricationMechanical oil pump
CoolingAir
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity8.00 litres (2.11 gallons)
Emissions
Chassis
Frame Type
Rake
Trail
Front Suspension32 mm hydraulic fork.
Front Travel76 mm (3.0 inches)
Rear SuspensionSingle shock absorber
Rear Travel64 mm (2.5 inches)
Seat
Seat Height780 mm (30.7 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height
Total Length1,880 mm (74.0 inches)
Total Width
Ground Clearance
Wheelbase1,340 mm (52.8 inches)
Dry Weight115.0 kg (253.5 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre120/70-12
Rear Tire/Tyre120/70-12
Front BrakesSingle disc
Front Brake Diameter220 mm (8.7 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter140 mm (5.5 inches)
Wheels
Comments
Made in Spain.