SEPTIAN, Wawan; SUKRAWAN, Yusep; MUBARAK, Ibnu; SAMOSIR, Daniel Moses. PENGARUH MODIFIKASI PORTING DAN POLISH TERHADAP PERFORMA ENGINE PADA SEPEDA MOTOR TIPE K81. Jurnal Pendidikan Vokasi Otomotif, [S. l.], v. 8, n. 2, p. 26–38, 2026. DOI: 10.21831/jpvo.v8i2.93594. Disponível em: https://jurnal.uny.ac.id/index.php/jpvo/article/view/93594. Acesso em: 21 may. 2026.