Aprilia RX/SX 50
 2008 Aprilia SX50 | |
| Manufacturer | Aprilia |
|---|---|
| Parent company | Piaggio |
| Production | 2006-present |
| Class | Motorcross, Supermoto |
| Engine | 49.76 cc, 11.5:1 CR, liquid-cooled, carburetor-fuelled two-stroke |
| Power | +/- 6.5 hp (4.8 kW) Restricted, 12 hp (8.9 kW) Derestricted |
| Transmission | 6-speed manual |
| Suspension | Ø40 mm hydraulic fork with leading axle; wheel travel 195 mm Rear: hydraulic monoshock; Non-adjustable; wheel travel 180 mm |
| Brakes | Front: 300 mm stainless steel disc; floating quad-piston caliper Rear: 180 mm stainless steel disc; twin-piston caliper |
| Fuel capacity | 7 litres |
| Related | Aprilia RX50, Aprilia MX50, Aprilia SX125 |
The 2006 Aprilia RX/SX 50 is a street/off-road 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[edit]
The 2006 Aprilia RX/SX 50s are the renovated successors of the Aprilia RX 50 first produced in 1992;[1] the panels and layout are based closely on the bigger displacement Aprilia RXV/SXVs.
Engine[edit]
The engine in the Aprilia SX 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[edit]
SX50[edit]
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 = 55.354 in (1,406 mm)
- Length = 79.68 in (2,024 mm)
- Width = 80.511 in (2,045 mm)
- Height = 32.677 in (830 mm)
- Tires = Front: 100/80 - 17 inch; Rear: 130/70 - 17-inch
RX50[edit]
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 = 55.354 in (1,406 mm)
- Length = 79.68 in (2,024 mm)
- Width = 80.511 in (2,045 mm)
- Height = 32.677 in (830 mm)
- Tires = Front: 90/90 - 21 inch; Rear: 110/80 - 18-inch
Restriction[edit]
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[edit]
- ^ "APRILIA models & history - autoevolution". www.autoevolution.com. Retrieved 2019-06-19.
- "SX 50 Technical sheet". Aprilia. Archived from the original on 3 May 2014. Retrieved 18 September 2018.
- Biker, Maxx (17 July 2009). "2009 Aprilia RX50/SX 50". Top Speed. Retrieved 18 September 2018.