Attribute | ![]() Derbi GPR Nude 50 × | ![]() Aprilia SR 50 R Street 2011 × |
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General | ||
Production from (year) | 2007 | 2011 |
Make | Derbi | Aprilia |
Model | Derbi GPR Nude 50 | Aprilia SR 50 R Street |
Category | Naked bike | Scooter |
Engine and transmission | ||
Engine type | Single cylinder, two-stroke | Single cylinder, two-stroke |
Fuel system | Carburettor. Dell´Ortho PHVA 14 | Carburettor. 17.5 mm throttle body |
Engine details | - | Intake: Reed valve |
Displacement (cm³) | 49.9 | 49 |
Cooling system | Liquid | - |
Transmission type,final drive | Shaft drive (cardan) | Belt |
Bore (mm) | - | 40 |
Stroke (mm) | - | 39.3 |
Gearbox | 6-speed | Automatic |
Ignition | Electronic C.D.I. | CDI - capacitor discharge ignition |
Lubrication system | Oil pump | Separate mixing with mechanical oil pump |
Compression | 11.5:1 | 12.1:1 |
Chassis | ||
Front suspension | Inverted fork. | Hydraulic fork |
Rear suspension | Monoshock | Engine unit acting as swingarm, secured to the frame by linkages on radial silent block mountings. |
Front brakes | Single disc | Single disc |
Rear brakes | Single disc | Single disc |
Diameter (mm) | 180 | 190 |
Frame type | - | Split single cradle frame in high tensile strength steel tube |
Front tyre | 110/80-17 | 130/60-13 |
Rear tyre | 130/70-17 | 130/60-13 |
Wheels | - | Five spoke light alloy wheels front and rear: 3.50 x 13´ |
Front wheel travel (mm) | 120 | 90 |
Rear wheel travel (mm) | 110 | 70 |
Other | ||
Starter | Electric | Electric |
Color options |
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Dimensions | ||
Wheelbase (mm) | 1,311 | 1,290 |
Overall length (mm) | 1,961 | 1,860 |
Seat height (mm) | 800 | 820 |
Performance | ||
Fuel capacity (l) | 13 | 6.5 |