WIRYADINATA, F.; A. ABDULLAH, N.; BAHRI WIDODO, S.; YAKOB, I. Effect of Standard and Racing Coil Usage with Additional Grounding Cable on Engine Performance of Scorpio Z 225. JURUTERA - Jurnal Umum Teknik Terapan, v. 12, n. 01, p. 38-47, 30 Jun. 2025.