<![CDATA[Factors that greatly affect the condition of the motorbike when racing a motorbike include the engine, racer, and all other elements such as the exhaust. Because it is necessary to analyze the exhaust to minimize the lack of public knowledge about the modification of the exhaust on the effect on the engine. This study discusses the effect of exhaust modification on engine performance on motorbikes with the Satria F 150 brand as the object of research because. In this research, we will look at some of the effects that occur from changes in exhaust gas flow in the standard exhaust. The effects you want to see are temperature, backpressure, torque and engine power. Each of these effects can be seen using the dyno test. The peak power in the standard exhaust is 15.5 HP at 9027 RPM and the maximum engine torque is 13.0 N.m at 7974 RPM. While the peak power in the modified exhaust is 15.3 HP at 9119 RPM and the maximum engine torque is 13.2 N.m rotated 7182 RPM. So the racing exhaust has a higher power at 3000 RPM to 7000 RPM while the standard is lower at 3000 RPM to 7000 RPM but higher at 8000 RPM. The results of fuel consumption data with racing exhausts and standard exhausts only get low torque and power at the initial pull, but when using a modified exhaust at low and high revolutions it produces more power and torque than standard exhausts making the engine more powerful by using the advantage of torque and power. Because the standard exhaust has an inhibition of the exhaust system from combustion because the exhaust pipe is smaller]]>
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