Aprilia RS50

The Aprilia RS50 is a sport moped made by Aprilia.^[1] The model made until 2005 was powered by a single cylinder two-stroke aluminium cylinder block, liquid cooled 49.7 cc (3.03 cu in) Motori_Minarelli AM6 engine. The new model, made since 2006, uses a single cylinder two-stroke aluminium cylinder block, liquid cooled 49.9 cc (3.05 cu in) engine made by Derbi, the D50B0, also known as the derbi NT engine. The bike is popular in countries that have restrictions on motorcycle engine size at specific ages. In restricted form the RS50 is capable of speeds of 45 km/h (30 mph), as per the laws in many European countries for those aged 15. In derestricted form, the 1997 model was tested at a speed of 45 km/h (28 mph).^[1] This and other similar machines such as the Derbi GPR 50 and Yamaha TZR50 have also been popular choices as a more adult-sized option for MiniGP racing, which is otherwise more commonly participated in by riders of smaller bikes such as the Honda NSR50.

Aprilia RS50

Manufacturer	Aprilia
Class	Sport bike/sport moped[1]
Engine	49.9 cc (3.05 cu in) single cylinder two-stroke, liquid cooled
Bore / stroke	39.86 mm × 40.0 mm (1.569 in × 1.575 in)
Compression ratio	11.5:1
Top speed	45 km/h (26 mph)
Power	3.9kw ( 5.2 ho )
Ignition type	CDI
Transmission	Wet clutch, six speed, chain, chain final drive
Frame type	Cast aluminium, box section, sloping twin-spar frame
Suspension	Front:: 40 mm (1.6 in) conventional fork, wheel travel 120 mm (4.7 in) Rear: Double member swing-arm with hydraulic monoshock, wheel travel 120 mm (4.7 in)
Brakes	Front: 300 mm (12 in) disc Rear: 180 mm (7.1 in) disc
Tires	17 in (430 mm) tubeless radial, front 110/80, rear 130/70
Wheelbase	1,280 mm (50 in)
Dimensions	L: 1,920 mm (76 in) W: 675 mm (26.6 in) H: 1,115 mm (43.9 in)
Seat height	810 mm (32 in)
Weight	89.5 kg (197 lb)[1] (dry)
Fuel capacity	13 L (2.9 imp gal; 3.4 US gal)