Three-wheel motorcycles, often referred to as trikes, come equipped with a variety of engine types, depending on the manufacturer, model, and intended use of the trike. The type of engine can significantly influence the performance, power, and characteristics of the trike.

1. Motorcycle Engines:

Many three-wheel motorcycles are powered by traditional motorcycle engines. These engines are similar to those found in two-wheeled motorcycles and can range from small, fuel-efficient engines to larger, high-performance ones. Motorcycle engines typically use a configuration known as a V-twin, where two cylinders are arranged in a V-shape. These engines come in various displacements and can be air-cooled or liquid-cooled.

Small Displacement Engines: Trikes designed for casual riding, commuting, or entry-level riders often feature small displacement motorcycle engines. These engines typically have displacements ranging from 125cc to 500cc and are designed for fuel efficiency and ease of use. They are ideal for urban commuting and light recreational riding.

Medium Displacement Engines: Many touring trikes and mid-sized recreational trikes are equipped with medium-displacement motorcycle engines. These engines range from 600cc to 1,200cc and offer a balance between power and fuel efficiency. They are suitable for long-distance cruising and recreational touring.

Large Displacement Engines: High-performance trikes, designed for power and speed, often come equipped with large displacement motorcycle engines. These engines can have displacements exceeding 1,200cc and are capable of delivering substantial horsepower and torque. They are favored by riders who enjoy spirited riding and highway cruising.

2. Automobile Engines:

Some three-wheel motorcycles are powered by automobile engines. These trikes are often referred to as "car-engine trikes" or "reverse trikes" because the engine is typically located in the front of the vehicle, similar to a car. Car engines in trikes offer certain advantages, including more significant horsepower and torque compared to motorcycle engines. However, they can also result in a heavier and bulkier trike.

Four-Cylinder Engines: Trikes with automobile engines commonly use four-cylinder engines, similar to those found in compact cars. These engines provide a good balance of power and efficiency. Some examples include engines from manufacturers like Honda, Volkswagen, or Subaru.

Six-Cylinder Engines: High-performance or luxury trikes may be equipped with six-cylinder engines, offering even greater power and smoother operation. These engines can provide a car-like driving experience and are often used in trikes designed for long-distance touring.

3. Custom and Specialty Engines:

In the world of custom-built and specialty trikes, a wide range of engines can be found. These trikes are often one-of-a-kind creations, and their engines can vary significantly. Builders and enthusiasts may use engines from various sources, including old aircraft engines, custom-built powerplants, or even electric motors for electric trikes.

Electric Motors: With the growing interest in electric vehicles, electric motors are increasingly being used in three-wheel motorcycles. Electric trikes are known for their quiet operation, instant torque, and zero emissions. They are particularly popular for urban commuting and eco-conscious riders.

4. Powertrain Configuration:

The powertrain configuration of a three-wheel motorcycle can also vary. Some trikes use a rear-wheel-drive setup, where power is delivered to the single rear wheel, while others employ a front-wheel-drive layout, similar to a car. The choice of powertrain configuration can impact the trike's handling and performance characteristics.

Three-wheel motorcycles, or trikes, can be equipped with a diverse range of engines, including traditional motorcycle engines, automobile engines, custom and specialty powerplants, and electric motors. The type of engine chosen often depends on the intended use of the trike, the desired performance characteristics, and the manufacturer's design choices. Riders can select a trike with an engine that suits their preferences and riding style, whether they prioritize fuel efficiency, power, or unique features like electric propulsion.