Motorcycles Specs > Aprilia > Aprilia Sonic Gp 50

Aprilia Sonic Gp 50 Specs

The Aprilia Sonic Gp 50 model is a Scooter bike manufactured by Aprilia . In this version sold from year 1999 , the dry weight is 105.0 kg (231.5 pounds) and it is equiped with a Single cylinder, two-stroke motor. The engine produces a maximum peak output power of  and a maximum torque of  . With this drive-train, the Aprilia Sonic Gp 50 is capable of reaching a maximum top speed of 48.3 km/h (30.0 mph) . Regarding the chassis characteristics, responsible for road holding, handling behaviour and ride confort, the Aprilia Sonic Gp 50 have a one beam, split in two cradles frame with front suspension being hydrauliclly operated teleoscopic fork and in the rear suspension it is equiped with hydraulic monoshock absorber . Stock tire sizes are  on the front, and  on the rear. As for stopping power, the Aprilia Sonic Gp 50 braking system includes Single disc. 155m with hydraulic transmission size  at the front and Expanding brake (drum brake). drum brake,110 m with mechanic transmission size 110 mm (4.3 inches) at the rear. 

Aprilia Sonic Gp 50 General Information

Brand Aprilia 
Model Aprilia Sonic Gp 50 
Start year 1999 
Year 1999 
Category Scooter 
Factory Warranty (Years / miles)  

Aprilia Sonic Gp 50 Dimensions, Aerodynamics and weight

Frame type one beam, split in two cradles 
Seat details  
Seat Height  
Alternate Seat Height  
Ground Clearance  
Trail size  
Wheels details  
Front Tyres - Rims dimensions  
Rear Tyres - Rims dimensions  
Front brakes Single disc. 155m with hydraulic transmission 
Rear brakes Expanding brake (drum brake). drum brake,110 m with mechanic transmission 
Front Brakes Dimensions - Disc Dimensions  
Rear Brakes Dimensions - Disc Dimensions 110 mm (4.3 inches) 
Curb Weight (including fluids) 180.0 kg (396.8 pounds) 
Dry Weight 105.0 kg (231.5 pounds) 
Front Percentage of Weight  
Rear Percentage of Weight  
Weight-Power Output Ratio :  
Fuel Tank Capacity 8.00 litres (2.11 gallons) 
Reserve Fuel Capacity 1.50 litres (0.40 gallons) 
Carrying Details and Capacity  
Front Suspension hydrauliclly operated teleoscopic fork 
Front Suspension Travel 65 mm (2.6 inches) 
Rear Suspension hydraulic monoshock absorber 
Rear Suspension Travel 70 mm (2.8 inches) 

Aprilia Sonic Gp 50 Engine and Transmission Technical Data

Engine type - Number of cylinders Single cylinder, two-stroke 
Engine details  
Fuel system Carburettor. unleaded petrol according to Din 51607 
Engine size - Displacement - Engine capacity 49.26 ccm (3.01 cubic inches) 
Bore x Stroke 40.0 x 39.2 mm (1.6 x 1.5 inches) 
Compression Ratio 0.5:1 
Number of valves per cylinder
Camshaft Valvetrain Configuration  
Maximum power - Output - Horsepower  
Maximum torque  
Engine Maximum RPM 1800 
Cooling system Liquid 
Lubrication system  
Engine oil capacity  
Exhaust system stainless steel pipe 
Gearbox Automatic 
Transmission type, final drive ratio Belt 
Clutch type  

Aprilia Sonic Gp 50 Performance

Top Speed 48.3 km/h (30.0 mph) 
Acceleration 0 to 100 km/h (0 to 62 mph) 20.000 seconds 
Acceleration 0 to 400m (1/4 mile) 20.000 seconds 
Recuperation 60 to 140 km/h in highest gear  
Fuel Consumption - MPG - Economy - Efficiency 99.99 litres/100 km (1.0 km/l or 2.35 mpg) 
CO2 emissions 2,319.8 CO2 g/km. (CO2 - Carbon dioxide emission) 

Aprilia Sonic Gp 50 Electrical Systems, Ignition and Equipment

Ignition Type CDI 
Electrical Details  
Starter Type Electric & kick