Julianto, E., D. Stiawan, F. Fuazen, and E. Sarwono. “EFFECT OF IGNITION SYSTEM IN MOTORCYCLE TO PERFORMANCE AND EXHAUST GAS EMISSIONS WITH FUEL RON 88, RON 90, AND RON 92”. SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin, vol. 14, no. 2, Dec. 2020, pp. 74-79, doi:10.24853/sintek.14.2.74-79.