“Air Intake System Optimization through Velocity Stack and Turbo Cyclone Variations for Fuel Efficiency Improvement and Exhaust Emission Reduction in 125cc Automatic Motorcycles”. BIS Energy and Engineering 3 (May 4, 2026): V326018. Accessed May 31, 2026. https://unimma.press/conference/index.php/biseeng/article/view/557.