Rear-mounted engines on motorcycles, also known as rear-engined motorcycles, are relatively uncommon compared to motorcycles with front-mounted engines. However, there are a few reasons why some motorcycles have rear-mounted engines:
Weight distribution: Placing the engine near the rear of the motorcycle can help achieve better weight distribution. By moving the engine to the rear, it shifts the center of gravity backward, which can enhance stability and handling characteristics. This design choice is often seen in certain racing motorcycles or high-performance bikes where precise handling and stability are crucial.
Aerodynamics: Rear-mounted engines can provide benefits in terms of aerodynamics. By positioning the engine at the rear, it allows for a more streamlined and compact front end. This design can reduce drag and improve overall aerodynamic efficiency, particularly at high speeds.
Unique designs and styling: Rear-engined motorcycles can offer unique design possibilities and aesthetic appeal. They can create a distinctive and visually striking look, setting them apart from the more conventional front-engined motorcycles. Some manufacturers may opt for rear-mounted engines to create a unique selling point or to evoke a specific visual style.
It's worth noting that rear-engined motorcycles are not as common as front-engined ones due to certain challenges and trade-offs associated with their design. Rear-mounted engines can affect weight distribution and require careful engineering to maintain proper balance and stability. Additionally, they may have limitations in terms of available space, cooling, and access for maintenance. These factors contribute to the relative rarity of rear-engined motorcycles compared to front-engined counterparts.