Minibikes
2005Polini 911 GP 3 Junior
17 fields on record
The 2005 Polini 911 GP 3 Junior is a lightweight sport minibike designed for young and novice riders seeking entry-level racing experience. Its compact 39cc engine delivers 4.2 horsepower with excellent handling characteristics, making it ideal for developing fundamental motorcycle skills on track or in competition environments.
- Capacity
- 39.7 ccm
- Engine
- Single single, four-stroke
- Gearbox
- Not on record
Know it? Add it → - Dry weight
- 20.5 kg
- Seat height
- 395 mm
- Power
- 4.2 HP
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It's built for minimoto track days and pit-bike style racing rather than any form of practical transportation.
- Built for
- It has a playful, go-kart-like character, prioritizing flickable agility and fun over outright speed or comfort.
- Not ideal for
- It's not for anyone needing real-world commuting capability, passenger carrying, long-distance touring, or high-speed performance.
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
- Engine type
- Single single, four-stroke
- Power/weight ratio
- 0.2049 HP/kg
- Bore x stroke
- 36.0 x 39.0 mm
- Compression
- 16.5:1
- Cooling system
- Air
- Fuel system
- Carburettor
- Ignition
- Electronic
Transmission
- Clutch
- Dry with centrifugal counter weights
Dimensions & weight
- Overall length
- 940 mm
- Seat height
- 395 mm
- Dry weight
- 20.5 kg
Chassis & suspension
- Frame
- Lattice tubular frame
Brakes & wheels
- Front brakes
- Single disc
- Rear brakes
- Single disc
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 GP 3 Junior?
The 2005 Polini 911 GP 3 Junior has a Capacity of 39.7 ccm (2.42 cubic inches).
What engine power does the Polini 911 GP 3 Junior have?
The 2005 Polini 911 GP 3 Junior has a Power of 4.2 HP.
How much does the Polini 911 GP 3 Junior weigh?
The 2005 Polini 911 GP 3 Junior has a Dry weight of 20.5 kg (45.2 pounds).
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