<![CDATA[The increasing population of motorbikes has an impact on fuel needs and the resulting increase in exhaust emissions. The electrolyzer has an effect on fuel consumption and gasoline exhaust of a modified 4-stroke motorbike. This research is experimental research, starting with designing and making the tools to be studied, then conducting research. As a result, there was a decrease in fuel consumption of 31.36% at 2000 RPM rotation, 8.73% at 4000 RPM engine speed, and 15.48% at 6000 RPM rotation. While exhausting emissions, there was a decrease in CO of 47.37%, an increase in h22o of 24.37%, and a decrease in HC of 45.11% at 2000 RPM rotation. The 4000 RPM rotation decreased CO by 89.11%, CO2 increased by 35.48%, and HC decreased by 36.98%. The 6000 RPM rotation decreased CO by 41.67%, CO2 increased by 17.26% and HC decreased by 6.92%. Semakin banyak populasi sepeda motor berdampak pada kebutuhan bahan bakar dan meningkatnya emisi gas buang yang dihasilkan. Elektroliser berpengaruh pada konsumsi bahan bakar dan gas buang sepeda motor 4 langkah modifikasi injeksi. Penelitian ini merupakan penelitian eksperimen, dimulai dengan merancang dan membuat alat yang akan diteliti, kemudian dilakukan penelitian. Hasilnya, terjadi penurunan konsumsi bahan bakar sebesar 31.36% pada putaran 2000 RPM, 8.73% pada putaran mesin 4000 RPM dan 15.48% pada putaran 6000 RPM. Sedangkan emisi gas buang, terjadi penurunan CO sebesar 47.37%, kenaikan CO2 sebesar 24.37% dan penurunan HC sebesar 45.11% pada putaran 2000 RPM. Putaran 4000 RPM terjadi penurunan CO sebesar 89.11%, kenaikan CO2 sebesar 35.48%, dan penurunan HC sebesar 36.98%. Putaran 6000 RPM terjadi penurunan CO sebesar 41.67%, kenaikan CO2 sebesar 17.26% dan penurunan HC sebesar 6.92%.]]>
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