Analisa konsumsi bahan bakar bensin dan akselerasi sepeda motor 4-langkah / 125 cc dengan penambahan LPG (Propana 10,6 % dan Butana 78,16 %) = Fuel consumption and acceleration analysis of 4-stroke / 125 cc motorcycle with LPG (10,6% Propane and 78,16% Butane) addition