An air cooled inline twin of 20cc's. Overhead valve with roller lifters. Crossflow cyl. head. Airplane carb with Delrin manifold. Pieced frame and crankshaft. Points ignition fired by a vintage Smith twin coil. Built fall of 2011. Read the build here on HMEN! http://www.youtube.com/watch?v=apF_uoF1Nao