The KTM Factory Spark Plug A40039993010 is an essential upgrade for riders looking to maximize the performance and reliability of their engine. Designed with precision, this spark plug provides a more efficient spark, improving combustion efficiency and optimizing engine performance. It delivers quicker starts, smoother idling, and more consistent power across all RPM ranges, making it perfect for competitive riders and off-road enthusiasts alike. Crafted from high-quality materials, the Factory Spark Plug ensures durability and longevity, standing up to the harsh conditions of intense riding. Its unique design promotes better fuel efficiency, reduces engine fouling, and maintains optimal spark quality, allowing you to ride harder and longer without worrying about performance dips. Ideal for those who demand the best from their motorcycle or dirt bike, the Factory Spark Plug offers a reliable solution for maintaining peak engine performance. Whether you’re racing on the track or exploring rugged trails, this spark plug ensures that your engine operates at its full potential, delivering maximum power and throttle response when you need it most. Make the switch to the Factory Spark Plug for improved engine efficiency, better throttle response, and the confidence to tackle any terrain. FEATURES Extremely robust spark plug Center electrode tip made of iridium Reinforced ground electrode Special design for better ignition and performance Copper gasket for improved heat dissipation FITS This spark plug is suitable for use with the following KTM motorcycle models: 50 SX 2024-2025 50 SX Factory Edition 2024-2025 65 SX 2024-2025 85 SX 19/16 2025