Harley-Davidson motorcycles utilize spark plugs specifically designed for their engines. These components ignite the air-fuel mixture within the combustion chamber, a critical process for engine function. While Harley-Davidson brands some spark plugs, the actual manufacturing often comes from established spark plug manufacturers to Harley-Davidson’s specifications. Identifying the specific manufacturer for a particular model or year requires consulting official documentation like the parts catalog or service manual.
The correct spark plug ensures optimal engine performance, fuel efficiency, and longevity. Using incompatible components can negatively impact performance and potentially damage the engine. Historically, spark plugs have evolved alongside engine technology, with modern versions offering improved durability and performance compared to earlier iterations. Understanding the source and specifications of these components is crucial for proper maintenance and repair.