Scooters
1999Aprilia Sonic Gp 50
35 fields on record
The 1999 Aprilia Sonic GP 50 is a lightweight automatic scooter ideal for young riders and urban commuters seeking affordable, practical transportation. Powered by a modest 49cc liquid-cooled engine, it prioritizes reliability and ease of use with its electric and kick starter options. Best known for its economical performance and accessible riding experience in the entry-level scooter segment.
- Capacity
- 49.3 ccm
- Engine
- Single, two-stroke
- Gearbox
- Not on record
Know it? Add it → - Dry weight
- 105.0 kg
- Seat height
- 770 mm
- Power
- 5.4 HP (4.0 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Designed purely for short, low-speed urban commuting and errands rather than any kind of performance riding.
- Built for
- A simple, practical little runabout scooter with automatic transmission and no pretensions of speed or sportiness.
- Not ideal for
- This is not the bike for highway travel, touring, passengers, or anyone seeking real performance.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 49.3 ccm
- Power
- 5.4 HP (4.0 kW)
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.0514 HP/kg (dry)
- Bore x stroke
- 40.0 x 39.2 mm
- Compression
- 12.5:1
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Electric & kick
- Ignition
- CDI
- Lubrication system
- Separate mixing with mechanical pump
Transmission
- Transmission type
- Automatic
- Final drive
- Belt
Performance
- Top speed
- 48.3 km/h (30.0 mph)
Dimensions & weight
- Wheelbase
- 1175 mm
- Overall length
- 1680 mm
- Overall width
- 610 mm
- Overall height
- 1070 mm
- Seat height
- 770 mm
- Dry weight
- 105.0 kg
- Fuel capacity
- 8.00 litres
- Reserve fuel capacity
- 1.50 litres
Chassis & suspension
- Frame
- one beam, split in two cradles
- Front suspension
- hydrauliclly operated teleoscopic fork
- Rear suspension
- hydraulic monoshock absorber
- Front wheel travel
- 65 mm
- Rear wheel travel
- 70 mm
Brakes & wheels
- Front brakes
- Single disc. 155m with hydraulic transmission
- Front brakes diameter
- 155 mm
- Rear brakes
- Expanding brake (drum brake). drum brake,110 m with mechanic transmission
- Rear brakes diameter
- 110 mm
- Front tyre
- 100/90-10
- Rear tyre
- 100/90-10
Other
- Color options
- yellow, black, red and black, blue
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
Rider Reviews
Common questions
What is the engine size of the Aprilia Sonic Gp 50?
The 1999 Aprilia Sonic Gp 50 has a Capacity of 49.3 ccm (3.01 cubic inches).
What engine power does the Aprilia Sonic Gp 50 have?
The 1999 Aprilia Sonic Gp 50 has a Power of 5.4 HP (4.0 kW).
How much does the Aprilia Sonic Gp 50 weigh?
The 1999 Aprilia Sonic Gp 50 has a Dry weight of 105.0 kg (231.5 pounds).
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