These are the known mechanical and performance specifications for your 2009 Derbi Senda DRD Racing 50 SM.
Basic Specs

Engine
Displacement49.90 ccm (3.04 cubic inches)
Type
DetailsSingle cylinder, two-stroke
Max RPM
Compression11.5:1
Bore/Stroke39.9 x 40.0 mm (1.6 x 1.6 inches)
Valves/Cylinder
FuelingCarburettor. 17.5 mm
IgnitionElectronic CDI
Exhaust
LubricationOil pump
CoolingLiquid
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity6.50 litres (1.72 gallons)
Emissions
Chassis
Frame Type
Rake
Trail
Front Suspension40 mm upside down fork.
Front Travel250 mm (9.8 inches)
Rear SuspensionProgressive linkage monoshock with separate gas tank.
Rear Travel250 mm (9.8 inches)
Seat
Seat Height875 mm (34.4 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height
Total Length2,005 mm (78.9 inches)
Total Width808 mm (31.8 inches)
Ground Clearance
Wheelbase1,390 mm (54.7 inches)
Dry Weight96.0 kg (211.6 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre100/80-17
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
Made in Spain.