Effect of BBM1 Fuel, BBM2, BBM3, and BBM3 Mixture with Ethanol 85/15, on Exhaust Gas Emissions and Engine Temperature on the Yamaha R-15 Motorcycle

Exhaust gas emissions are gases produced from the combustion of a motorbike engine. The compounds contained include carbon monoxide (CO), hydrocarbon (HC), carbon dioxide (CO2), and oxygen (O2). This research aims to determine several differences in the values of exhaust emission levels and engine engine temperatures from the use of four types of fuel variations. At rpm 2000-8000 rpm with a time span of 3 minutes at each rpm. From the research test results, the lowest CO emission levels were at 4000 rpm engine speed on BBM4 with a value of 0.06% vol. The highest HC emission level is in BBM4 with a value of 621 ppm at an engine speed of 3000 rpm. The CO2 emissions that appear to be the most stable are at BBM4 with an average of above 10%. O2 emissions which showed the lowest figure of 15.35% were on BBM3 at 8000 engine revolutions.