WIBOWO, Herdianto Tri; AKBAR, Ali Akbar. The Effect Of The Addition of Copper DB Killer On Yamaha Vixion 150cc Motorcycle on Exhaust Emissions: Pengaruh Penambahan DB Killer Tembaga Pada Knalpot Racing Motor Yamaha Vixion 150cc Terhadap Emisi Gas Buang. Procedia of Engineering and Life Science, [S. l.], v. 4, 2023. DOI: 10.21070/pels.v4i0.1423. Disponível em: https://pels.umsida.ac.id/index.php/PELS/article/view/1423. Acesso em: 5 jul. 2025.