The decision to use multiple spark plugs or a single spark plug in a motorcycle engine depends on various factors, including the engine design, intended performance characteristics, and the manufacturer's design philosophy.
Multiple spark plugs are typically employed in engines to enhance combustion efficiency, especially in larger displacement or higher-performance engines. The primary advantage of multiple spark plugs is the ability to ignite the air-fuel mixture at different points in the combustion chamber, leading to a more complete and efficient burn.
On the other hand, using a single spark plug simplifies the design and reduces production costs. It may be a deliberate choice by KTM to prioritize simplicity and cost-effectiveness in their single-cylinder bikes. KTM is known for its lightweight and high-performance motorcycles, and they may have optimized their engine design to achieve a balance between performance, reliability, and affordability.
Additionally, the specific design and engineering considerations of the KTM engines could also contribute to their decision to use a single spark plug. They might have implemented other techniques such as optimizing the combustion chamber shape, improving the fuel injection system, or utilizing advanced ignition timing control to achieve efficient combustion without the need for multiple spark plugs.
It's worth noting that the number of spark plugs is just one aspect of the overall engine design, and factors such as compression ratio, intake/exhaust system, fuel delivery, and ignition timing also play crucial roles in determining an engine's performance and efficiency.
To gain more accurate insights into the technical reasons behind KTM's choice of a single spark plug for their single-cylinder bikes, it would be best to consult official documentation, technical specifications, or reach out to KTM directly.