Minibikes
2007Polini 911 GP4
24 fields on record
The 2007 Polini 911 GP4 is a lightweight sport minibike designed for young riders and racing enthusiasts seeking high performance in a compact package. Its 39.69cc single-cylinder engine delivers 4.20 horsepower with a 14.0:1 compression ratio, making it ideal for competitive pit bike racing. Known for its nimble handling and minimal 22kg weight, this machine excels in tight circuit work and entry-level motorsport competition.
- Capacity
- 39.7 ccm
- Engine
- Single
- Gearbox
- Not on record
Know it? Add it → - Dry weight
- 22.0 kg
- Seat height
- 425 mm
- Power
- 4.2 HP (3.1 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It exists purely for minimoto track days and pit-bike style sprint racing, where its tiny displacement and featherweight chassis reward corner speed over horsepower.
- Built for
- It has the playful, revvy, flickable personality of a pure minimoto racer, living for tight, twisty go-kart-style circuits.
- Not ideal for
- It is not suitable for anyone wanting real-world commuting, highway travel, passenger carrying, or any off-road riding.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 39.7 ccm
- Power
- 4.2 HP (3.1 kW)
- Engine type
- Single
- Power/weight ratio
- 0.1909 HP/kg (dry)
- Bore x stroke
- 36.0 x 39.0 mm
- Compression
- 14.0:1
- Cooling system
- Air
- Fuel system
- Carburettor
- Starting
- Kick
Transmission
- Final drive
- Chain
- Clutch
- Dry with centrifuge counter weigths
Dimensions & weight
- Overall length
- 960 mm
- Overall width
- 240 mm
- Seat height
- 425 mm
- Dry weight
- 22.0 kg
Chassis & suspension
- Frame
- Latticed tubular frame
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 148 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 130 mm
- Front tyre
- 90/65-R6.5
- Rear tyre
- 110/50-R6.5
Other
- Color options
- Blue/white
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 Polini 911 GP4?
The 2007 Polini 911 GP4 has a Capacity of 39.7 ccm (2.42 cubic inches).
What engine power does the Polini 911 GP4 have?
The 2007 Polini 911 GP4 has a Power of 4.2 HP (3.1 kW).
How much does the Polini 911 GP4 weigh?
The 2007 Polini 911 GP4 has a Dry weight of 22.0 kg (48.5 pounds).
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