High-performance NGK BP7HS 5111 spark plug designed for optimal combustion in two-stroke engines. Precision-crafted with a durable copper core and corrosion-resistant nickel-plated shell for extended lifespan. Features a triple gasket seal to prevent gas leakage and ensure consistent ignition under high-pressure conditions. Ideal for 50cc-60cc motorcycles including popular models like AG100, DIO, and engines requiring 4114 or 4135 plugs. The tapered cut ground electrode promotes better flame propagation, delivering 15% faster throttle response compared to standard plugs. Direct OEM replacement that meets E6TC specifications for hassle-free installation. Engineered for superior performance in high-RPM applications like motocross, urban commuting, and recreational scooters. Comes with factory-set 0.7mm gap for immediate use without adjustments. Ultra-fine iridium tip ensures reliable cold starts in temperatures as low as -20°C.