Having two spark plugs per cylinder in a motorcycle can provide several benefits, including improved combustion efficiency and enhanced performance. Here are a few reasons why some motorcycles feature dual spark plugs per cylinder:
Faster and more complete combustion: Dual spark plugs ignite the air-fuel mixture from two different points within the combustion chamber, leading to faster and more efficient combustion. This helps ensure that the fuel is burned more completely, resulting in increased power output and improved fuel efficiency.
Enhanced flame propagation: The additional spark plug creates multiple flame fronts that propagate through the combustion chamber, allowing for a more even and rapid burning of the fuel-air mixture. This can reduce the occurrence of incomplete combustion, which can cause issues like misfires or poor throttle response.
Improved reliability: Having two spark plugs per cylinder can provide redundancy in case one of the spark plugs fails. If one plug becomes fouled or develops a problem, the other plug can still ignite the mixture and keep the engine running.
Emission control: Dual spark plugs can contribute to better emission control by promoting cleaner and more thorough combustion. This can help meet stringent emission regulations and reduce harmful exhaust emissions.
It's worth noting that not all motorcycles employ dual spark plugs per cylinder. The use of dual spark plugs is often seen in high-performance motorcycles or those designed for increased efficiency and power. The specific design and engineering considerations for each motorcycle model determine whether dual spark plugs are incorporated.