These are the known mechanical and performance specifications for your 2010 Derbi Senda Baja 125 SM.
Basic Specs

Engine
Displacement124.00 ccm (7.57 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression9.2:1
Bore/Stroke56.5 x 49.5 mm (2.2 x 1.9 inches)
Valves/Cylinder2
FuelingCarburettor. 26 mm
IgnitionElectronic CDI
ExhaustEuro 3
LubricationOil pump
CoolingAir
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity8.00 litres (2.11 gallons)
Emissions
Chassis
Frame Type
Rake
Trail
Front Suspension41 mm. hydraulic fork.
Front Travel195 mm (7.7 inches)
Rear SuspensionMonoshock.
Rear Travel200 mm (7.9 inches)
Seat
Seat Height845 mm (33.3 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height1,191 mm (46.9 inches)
Total Length2,104 mm (82.8 inches)
Total Width
Ground Clearance
Wheelbase1,452 mm (57.2 inches)
Dry Weight118.0 kg (260.1 pounds)
Wet Weight128.0 kg (282.2 pounds)
Wheels & Brakes
Front Tire/Tyre110/80-17
Rear Tire/Tyre130/70-17
Front BrakesSingle disc
Front Brake Diameter300 mm (11.8 inches)
Rear BrakesSingle disc
Rear Brake Diameter220 mm (8.7 inches)
Wheels
Comments
Derbi is a Spanish brand.