ANALISIS PENGGUNAAN BAHAN BAKAR LIQUIFIED PETROLEUM GAS (LPG) TERHADAP KONSUMSI BAHAN BAKAR DAN EMISI GAS BUANG CO DAN HC PADA MOTOR SUPRA X 125R TAHUN 2009

The purpose of this research are: (1) To investigate fuel consumption and exhaust emissions (CO and HC) on motorcycles Supra X 125 R in 2009 that use LPG fuel. (2) To analyze the use of LPG fuel to fuel consumption and exhaust emissions (CO and HC) on motorcycles Supra X 125 R in 2009. Based on this research can be conclude: (1) The test results of 3 kg LPG to a distance of 250 km at a price of Rp. 15 000. While the use of premium fuel, a liter of premium with the price of Rp. 5000 to a distance of 55 km so that for a distance of 250 km requires 4.55 liters at a price of Rp. 22 750. Thus, the use of LPG fuel save money Rp. 7750. (2) The results gas emissions levels of CO 0,025 % and gas emissions levels of HC 2274 ppm. Still under standard exhaust emissions limits released by the ministry of the environment number 05 in 2006. (3) The use of LPG fuel in the motor Supra X 125R in 2009 can’t be directly applied, because the Supra X 125R is a motorcycle with a premium fuel engine character. Changes must be done on the carburetor is to change the size of the pilot jet to # 118 and a # 200 main jet for LPG stoichiometri AFR 21: 1