Anyone tried one of these ??
http://www.google.ca/imgres?imgurl=http://img.alibaba.com/photo/11910867/5_7_Liter_Air_Cooled_Engine.jpg&imgrefurl=http://www.alibaba.com/product/elzorroperu-11910867-11148907/5_7_Liter_Air_Cooled_Engine.html&usg=__7RpulaUGwMTSCjU6mK_GI7puP1Y=&h=370&w=567&sz=48&hl=en&start=22&um=1&itbs=1&tbnid=By4Pi-gDTI6tKM:&tbnh=87&tbnw=134&prev=/images%3Fq%3Dvw%2Baircooled%2Bengine%26start%3D20%26um%3D1%26hl%3Den%26sa%3DN%26ndsp%3D20%26tbs%3Disch:1
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