Polini 911 GP4 2007 - Specifications & Review

Introducing the 2007 Polini 911 GP4: A Pocket Rocket for the Track

The 2007 Polini 911 GP4 is a standout in the world of minibike sport, designed specifically for competition use and delivering an exhilarating ride experience. With its lightweight frame and agile handling, the GP4 is engineered to dominate the track. This motorcycle embodies the spirit of racing, appealing to enthusiasts and competitors who crave speed and precision in a compact package. While its design may be diminutive, the performance it offers is anything but. The GP4 is built for those who seek a pure racing experience, and as such, it is not intended for public highway use—making it a true racing machine.

Engine Performance and Riding Characteristics

At the heart of the Polini 911 GP4 lies a spirited 39.69 ccm single-cylinder, two-stroke engine that generates an impressive 4.20 HP (3.1 kW). This high-revving powerhouse, with a compression ratio of 14.0:1, ensures that every twist of the throttle delivers swift acceleration and exhilarating power, making it a joy to ride on the track. The air-cooled engine utilizes a SHA 14.14 carburettor for optimal fuel delivery, while the dry clutch with centrifugal counterweights provides smooth engagement, enhancing the overall riding experience. With a lightweight construction of only 22 kg (48.5 pounds), the GP4 boasts a remarkable power-to-weight ratio of 0.1909 HP/kg, allowing riders to effortlessly navigate the tightest corners and unleash their inner racer.

Key Features and Technology

The 2007 Polini 911 GP4 is not just about raw power; it is also engineered with performance-enhancing features that cater to the competitive spirit. Its latticed tubular frame offers exceptional rigidity while keeping the weight low, contributing to agile handling. The bike is equipped with reliable single disc brakes at both the front (148 mm) and rear (130 mm), ensuring strong stopping power when needed. With a seat height of 425 mm (16.7 inches), riders can maintain a low center of gravity for better control. The GP4 is available in striking blue and white color options, presenting a look that reflects its racing pedigree. As a kick-start model, it positions itself as a classic, leaning into the thrill of traditional motorcycle design.

Pros and Cons of the Polini 911 GP4

Pros:

1. Lightweight and Agile: At just 22 kg, the GP4 offers exceptional maneuverability, ideal for tight corners on the track.
2. Powerful Engine Performance: With 4.20 HP from a compact two-stroke engine, it delivers thrilling acceleration and responsive handling.
3. Robust Braking System: Equipped with reliable single disc brakes, the GP4 ensures confident stopping power for competitive riding.

Cons:

1. Limited Use: Designed strictly for competitive sports, it is not suitable for road use, limiting its versatility.
2. Kick Start Only: The absence of an electric start can be less convenient, especially in competitive scenarios.
3. Low Seat Height: While beneficial for handling, the low seat height might not accommodate taller riders comfortably.

In summary, the 2007 Polini 911 GP4 is a dedicated competition minibike that promises an exhilarating ride for those who live for the track. Its blend of lightweight construction, powerful engine performance, and advanced features make it an appealing choice for serious riders looking to enhance their racing experience.