Comparison of Aprilia RS4 50 Replica 2017 and Aprilia SR 50 Street 2015 [S]ave
| Attribute |  Aprilia RS4 50 Replica 2017 × |  Aprilia SR 50 Street 2015 × |
|---|---|---|
| General | ||
| Production from (year) | 2017 | 2015 |
| Make | Aprilia | Aprilia |
| Model | Aprilia RS4 50 Replica | Aprilia SR 50 Street |
| Category | Sport | Scooter |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, two-stroke |
| Fuel system | Carburettor | Carburettor. 17.5 mm throttle body |
| Engine details | - | Reed valve intake |
| Displacement (cm³) | 49.9 | 49 |
| Cooling system | Liquid | - |
| Transmission type,final drive | Chain | Belt |
| Bore (mm) | 39.9 | 40 |
| Stroke (mm) | 39.9 | 39.3 |
| Gearbox | 6-speed | Automatic |
| Emission details | Euro 2 | - |
| Driveline | Chain, 11/53. Primary drive: Gears, 21/78. | - |
| Ignition | Electronic with CDI capacity discharge | Capacitor discharge ignition |
| Clutch | Multiplate wet clutch | - |
| Lubrication system | Automatic mixer | Separate mixing with mechanical oil pump |
| Compression | 11.5:1 | 12.1:1 |
| Chassis | ||
| Front suspension | 41 mm upside down fork, wheel travel 110 mm | Hydraulic fork |
| Rear suspension | Asymmetric swingarm with monoshock, wheel travel 130 mm | Engine unit acting as swingarm, secured to the frame by linkages on radial silent block mountings. |
| Front brakes | Single disc. Radial 4 piston calliper | Single disc |
| Rear brakes | Single disc | Single disc |
| Diameter (mm) | 218 | 190 |
| Frame type | - | Split single cradle frame in high tensile strength steel tube |
| Front tyre | 100/80-17 | 130/60-13 |
| Rear tyre | 130/70-17 | 130/60-13 |
| Seat | One or two-person seat | - |
| Wheels | Light alloy with 6 split spokes, with sealing profile for tubeless tyres; front: 2.75 x 17in.; rear: 3.50 x 17in. | Five spoke light alloy wheels front and rear: 3.50 x 13´ |
| Front wheel travel (mm) | - | 90 |
| Rear wheel travel (mm) | - | 70 |
| Other | ||
| Starter | Electric | Electric |
| Color options |
|
|
| Carrying capacity | Under seat storage compartment | 28 litre top box in matching paintwork or standard black finish. |
| Instruments | Analogue/digital multifunction dashboard with LCD display | - |
| Dimensions | ||
| Wheelbase (mm) | 1,350 | 1,290 |
| Overall height (mm) | 1,138 | 1,200 |
| Overall length (mm) | 1,953 | 1,860 |
| Seat height (mm) | 820 | 820 |
| Performance | ||
| Reserve fuel capacity (l) | 3.3 | - |
| Fuel capacity (l) | 14.5 | 6.5 |
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