Derbi Senda 50

The Derbi Senda SM 50 is a 50 cc motorcycle made by Spanish company Derbi. It is one of the most popular bikes made by Derbi due to its appeal to young riders, its styling and its amazing tuning possibilities. The bike itself uses an EBS/EBE, D50B0 or D50B1 engine which produces a staggering 5bhp. The Derbi Senda is identically constructed as the Gilera SMT 50. Between 1995 and 2005, Derbi was produced with an EBS / EBE engine, and after 2005, D50B0 / D50B1 engines were used until 2023 when production ended.

Fuel capacity: 7.45 liters

Engine
50 cc single cylinder, four-petal plastic reed valve case induction and two-stroke injection (automix) carburetor fueled.
 * Engine displacement – 49.76 cc
 * Bore/stroke – 39,88×40 mm
 * Compression ratio – 11.5:1
 * Clutch – Wet, multiple plate
 * Starting – Kickstart
 * Exhaust
 * Rotor Ignition/Generator = 85w/120w
 * Cooling system – liquid-cooled
 * Fuel tank size = 7.45 litres
 * Fuel system – Carburetor Dell'Orto PVHA 17.5 mm
 * Main jet = 85
 * Needle Jet = A13, notch #2
 * Idle jet = 30
 * Transmission
 * 1st = 1st 11/34
 * 2nd = 2nd 15/30
 * 3rd = 3rd 18/27
 * 4th = 4th 20/24
 * 5th = 5th 22/23
 * 6th = 6th 23/22
 * Primary drive = 21/78
 * Sprockets
 * Front = 14 Teeth
 * Rear = 52 Teeth
 * Overall Final Drive ratio = 14/52
 * Spark plug = NGK BR9ES/BR9EG/BR9EIX/BR8ES
 * Gap = .6-7 mm
 * Wheelbase = 55.354 in
 * Length = 79.68 in
 * Width = 80.511 in
 * Height = 32.677 in
 * Tires = Front: 100/80 - 17 inch; Rear: 130/70 - 17-inch

Restriction
Restriction varies depending on the country and dealer, person, or company the bike is purchased from. The engine is usually restricted in the following ways:

CDI unit restricted to 10,000 RPM
 * Carburetor
 * 'Strangle' baffle/plate in Air filter manifold
 * [74 Main jet
 * Exhaust
 * Exhaust fume/pressure outlet pipes
 * Sprockets
 * Front; reduced to 11/53 12/53 or 14/54