Sport bike

A sport bike is a motorcycle optimized for high performance. These machines are designed specifically for speed, acceleration, braking, and cornering. They are most often used on asphalt concrete race tracks or paved roads. To achieve these goals, engineers focus on performance over other factors. This means sport bikes often sacrifice rider comfort, fuel economy, and storage space. They may also produce more noise than standard motorcycles.

To manage high speeds, sport bikes use specific design elements. Many models feature fairings, which are smooth outer shells. These fairings, along with a windscreen, deflect wind away from the rider. This process improves aerodynamics by reducing aerodynamic drag. The rider's position, or ergonomics, also favors function over comfort. Riders often use clip-on handlebars, which are low-mounted controls. This setup forces the rider's weight forward and over the fuel tank.

Every part of the bike works together to maintain stability. High-performance engines sit inside lightweight frames to improve the power-to-weight ratio. Manufacturers often use expensive, high-tech materials to keep the weight low. Braking systems are also highly specialized for these machines. They combine high-performance brake pads with multi-piston calipers. These calipers clamp onto oversized, vented disc brakes, also known as rotors.

Handling and cornering rely on the bike's geometry and tires. Sport bikes use larger and wider tires than most other motorcycles. These wide tires allow for higher cornering speeds and greater lean angles. The suspension systems are advanced and highly adjustable for stability. Engineers also focus on the wheelbase, which is the distance between the wheels. Modern sport bikes often have shorter wheelbases for quicker turning. However, this can lead to unintentional wheelies or stoppies during hard acceleration or braking.

The history of the sport bike shows a rapid evolution. In 1959, Soichiro Honda noted that speed and thrill were essential to motorcycles. A major turning point occurred in 1969 with the Honda CB750. This model provided dramatic increases in power and speed for the general public. During the 1970s, large inline-four engines began to dominate the market. These engines drove improvements in suspension and braking technology. By the 1980s, sport bikes became nearly identical to professional racing motorcycles.

Today, sport bikes are divided into several common classes. Lightweight bikes are often called entry-level or beginner bikes. These typically have engine displacements of up to 400cc. Middleweight bikes, or supersport bikes, often have displacements around 600cc. The largest category is the superbike, also known as the liter-class. These engines have displacements of 1,000cc or higher. Some manufacturers also create "hyperbikes," which are even larger and faster than standard superbikes.

There are many variations of the sport bike design. Some models are marketed as race replicas. These are intended to look and act like the bikes used in professional racing. Other variations include naked bikes and streetfighters. These bikes have little to no fairing bodywork. This allows the rider to sit in a more upright posture. Another category is sport touring motorcycles. These are mid- to large-sized bikes that offer more carrying capacity and relaxed ergonomics.

Global differences also change how people view these machines. In the less developed world, smaller engine sizes are the standard. For example, in 2002, India had about 37 million two-wheelers. However, by 2008, only about 3,000 of those were motorcycles with 125cc or more. This means fewer than one in 12,000 vehicles in India were large-displacement motorcycles. In developed countries, the perception of size has shifted over time. What was once considered a "big four" engine in 1969 is now seen as a middle-range engine today.