The Aprilia RX is an Enduro motorcycle widely produced by Aprilia. It is powered by a six-speed, carburetor-fuelled, nikasil-lined and cast iron single-cylinder two-stroke engine manufactured by Derbi/Piaggio.
Styling and concept
The 2006 Aprilia RX is the renovated successors of the Aprilia RX first produced in 1992; the panels and layout are based closely on the bigger displacement Aprilia RXV.
Engine The engine in the Aprilia RX 50 is sourced from Derbi/Piaggio (D50B0/D50B1). This engine is used in the Derbi Senda DRD/X-Race/X-Treme supermotos and crossers, as well as the 2006 onwards Derbi GPR 50 and Aprilia RS 50 road bikes, although the road bikes feature an electric starter instead of a kickstarter on the supermotos. Engine parts from the crossers and supermotos can be directly swapped with one another; there are some small differences between the road bike and supermoto engine and frame which may require modification to transfer some external engine parts (exhaust, airbox etc.)
Specifications
RX50 50 cc single cylinder, six petal 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 = Catalytic converter Rotor Ignition/Generator = 85w/120w Cooling System = Liquid-cooled Fuel Tank Size = 7 litres Fuel System = Carburetor Dell'Orto PVHA 17.5 mm Main Jet = 95 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 = 53 Teeth Overall Final Drive ratio = 14/53 Spark Plug = DENSO W27ESR-U/IW27 NGK BR9ES/BR9EG/BR9EIX Gap = .6-7 mm Wheelbase = Length = Width = Height = Tires = Front: 90/90 - 21 inch; Rear: 110/80 - 18-inch
Restriction Restriction varies depending on the country and sky, person, or company the bike is purchased from. The engine is usually restricted in the following ways:
Carburetor 'Strangle' baffle/plate in Air filter manifold 74 Main jet Exhaust Exhaust fume/pressure outlet pipes Catalytic converter Sprockets Front; reduced to 11/53 or 12/53 Ignition system (only on models 2018 and after) Limited to 8000 RPM
References