Engineered by Polini for the minibike, sport motorcycle segment, the 2011 Polini 911 GP5 Reverse 50 pairs a 49.3 cc (3 cu in) air-cooled single cylinder, two-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 40.0 x 39.0 mm (1.6 x 1.5 inches) with a 16.5:1 compression ratio.
On the scales, the 911 GP5 Reverse 50 measures 20.5 kg (45 lbs) dry. Rider ergonomics and chassis geometry center around a 460 mm (18.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops. The 1.5-liter (0.4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Standover Height
460 mm (18.1 in)
Engine
Displacement49.3 ccm (3.01 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsAluminium cylinder
Compression16.5:1
Bore x Stroke40.0 x 39.0 mm (1.6 x 1.5 inches)
Fuel SystemCarburettor. PHGB 19, reed valve in the crankcase
Lubrication2% mixture
CoolingAir
Transmission
Final DriveChain (final drive)
ClutchDry centrifugal
Chassis
Frame TypeLatticed tubular frame
Front SuspensionTelescopic fork
Rear SuspensionSwing arm
Wheels & Brakes
Front Tyre90/65-R6.5
Rear Tyre110/50-R6.5
Front BrakesSingle disc
Front Brake Ø148 mm (5.8 inches)
Rear BrakesSingle disc
Rear Brake Ø130 mm (5.1 inches)
Dimensions & Weight
Dry Weight20.5 kg (45.2 pounds)
Seat Height460 mm (18.1 inches) If adjustable, lowest setting.
Overall Length1160 mm (45.7 inches)
Overall Width240 mm (9.4 inches)
Fuel Capacity1.50 litres (0.40 US gallons)
Other
Color OptionsBlue/white
LightNo lights
Notes
Italian minbikes for competiton-sports usage only. Pull start with self winding cable.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
