<![CDATA[The purpose of this research were: (1) To knew the effect of higher octane number on gasoline type to torque and engine power on Suzuki Shogun FL 125 SP 2007 motorcycle. (2) To knew the effect 10.2:1 high compression ratio on compression ratio variation to torque and engine power on Suzuki Shogun FL 125 SP 2007 motorcycle. (3) To knew the effect higher octane number on gasoline type and 10.2:1 high compression ratio on compression ratio variation to torque and engine power on Suzuki Shogun FL 125 SP 2007 motorcycle.This research used experimental method and the techniques of data analysis used descriptive data analysis.Based on this research can be concluded: (1) The higher octane number on gasoline type influenced of torque and engine power on Suzuki Shogun FL 125 SP 2007 motorcycle. (2) 10.2:1 high compression ratio on compression ratio variation type influenced of torque and engine power on Suzuki Shogun FL 125 SP 2007 motorcycle. Torque and engine power was decreased on 9.1:1 low compression ratio (2 gaskets) and 8.7:1 compression ratio (3 gaskets). (3) The higher octane number on gasoline type and 10.2:1 high compression ratio on compression ratio variation influenced of torque and engine power on Suzuki Shogun FL 125 SP 2007 motorcycle. (4) With used pertamax plus on 10.2:1 compression ratio can producted optimum torque 10.24 N.m at 5000 rpm and optimum engine power 9.8 HP at 7646 rpm on Suzuki Shogun FL 125 SP 2007 motorcycle.]]>
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