Designed for KTM RC390, this modified quick – release fuel tank cap features non – destructive in-stallation, developed based on the original vehicle without causing extra damage. Made of T6 avi-ation aluminum alloy via CNC technology and anodize oxidation. It boasts high hardness, light weight, and excellent sealing performance with compression spring for pressure boosting. CNC lathe ensures precise cutting, with meticulous superposition of line radians, presenting an ex-quisite appearance and superior texture. Anodize oxidation treatment prevents fading, ensuring long service life. The all – aluminum structure achieves lighter weight while guaranteeing high strength and good sealing. It provides an efficient, reliable and durable fuel tank cap modification solution for KTM RC390 owners, helping to enhance vehicle use experience and performance.