NGK Spark Plug Stock # 4492 (Motorcycle)

The NGK Spark Plug Stock # 4492 (Motorcycle) is a high-performance racing component designed to meet the rigorous demands of competitive powersports and high-output engines. Engineered for riders and technicians seeking reliable ignition under extreme thermal conditions, this specialized plug facilitates consistent combustion in modified or high-compression motorcycle engines. By providing a stable electrical path, it ensures that your machine maintains peak power delivery during high-RPM operation where standard plugs might fail.

This NGK Spark Plug Stock # 4492 (Motorcycle) features a 14 mm thread diameter and a 0.749-inch reach, utilizing a secure gasket seat to maintain a tight seal within the cylinder head. The internal resistor design is crucial for modern electronics, as it suppresses electromagnetic interference that can disrupt sensitive ignition systems or onboard telemetry. Its racing-grade construction is optimized for heat dissipation, allowing the electrode to remain within the ideal temperature range to prevent pre-ignition and fouling during intense track sessions.

Designed for professional racing applications and high-performance tuning, the NGK Spark Plug Stock # 4492 (Motorcycle) is an essential upgrade for those searching for specific heat ranges not found in standard consumer plugs. Compatibility is determined by the engine's mechanical requirements for thread length and seat type, making it a preferred choice for custom builds and race-ready sportbikes. Installing this precision-engineered component helps prevent spark blow-out and ensures the throttle response remains crisp and predictable across the entire powerband.