The NGK Iridium FR9BI-11 Spark Plug is a high-quality spark plug designed for motorcycles and scooters. With NGK being a reputable brand known for their reliable spark plugs, the FR9BI-11 model is specifically manufactured for efficient ignition performance. The use of iridium in the construction of this spark plug ensures durability and longevity, making it an excellent choice for maintaining optimal engine performance.