The purpose of this study was to determine how much influence the use of standard, platinum, and iridium spark plugs on fuel consumption on motorcycles supra x 125. The method used in this study is an experimental method or direct experiment. Turn on the motorbike, then increase the engine speed according to the design. Use a tachometer to measure the rpm whether it is in accordance with that set in the study. Use a stop watch to calculate the test time and after finishing see the results that have been obtained. By doing the no-load test 3 times in each experiment that you want to test. The results show that using platinum and iridium spark plugs can reduce fuel consumption.
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