You see, a couple weeks ago I rediscovered my father’s copy of A. Graham Bell’s 1983 masterpiece _Two-Stroke Performance Tuning. _As the title suggests, the book is a comprehensive guide to engine building and tweaking, with chapters detailing everything from ignition curves and combustion chamber design to carburetor tuning and exhaust fabrication. I squashed some solder and measured squish with various gasket combinations, added water by the 1/10th of a cubic centimeter to determine compression ratio, and marked the rotor for future ignition timing experimentation. My measurements show that the MB5 is on the reliable end of the performance spectrum, as in there is a lot of room for improvement. I know there’s not a lot of power to be squeezed out of a 64.5cc air-cooled two-stroke, but I’m looking forward seeing just how fast I can get the thing to go.