<![CDATA[The ignition system has a significant influence on fuel consumption, as well as the torque and power produced by an engine. Ignition systems in four-stroke gasoline engines have undergone significant development and refinement. In the early development of gasoline engines, the ignition system used contact breaker points (platina) to interrupt and connect the battery voltage to the primary coil. Currently, motorcycle manufacturers have increasingly adopted Capacitor Discharge Ignition (CDI) systems because conventional contact breaker systems have several limitations, including less efficient ignition and higher fuel consumption. Factory-installed CDI systems have a predetermined engine speed limit. When the engine is operated at an RPM exceeding the CDI limit, its performance may decrease. An unlimiter CDI is an ignition system that operates without a predetermined RPM limit and is capable of supporting engine operation at high speeds. This study aims to investigate the effect of using an unlimiter CDI on fuel consumption, torque, and power in a 110 cc Honda Beat motorcycle. The study employed a field study method involving direct investigation and observation of relevant data to obtain information on the parameters used in analyzing the CDI system installed on the motorcycle. Based on the results at engine speeds of 4,000, 6,000, and 8,000 rpm, the use of an unlimiter CDI resulted in lower fuel consumption compared with a limiter CDI. Furthermore, the torque and power produced by the unlimiter CDI were higher than those produced by the limiter CDI at all three tested engine speeds.]]>
