2-strokes

 what is a two stroke? A two-stroke engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston during one power cycle, this power cycle being completed in one revolution of the crankshaft why pick a two stroke  Two-stroke engines are often smaller, lighter and simpler than four-stroke engines and  deliver a higher power-to-weight ratio why are some two strokes outlawed A carbureted two-stroke engine can emit up to 25-30 percent of its fuel unburned into the water or atmosphere Uses of two strokes  Lawn and garden equipment including many string trimmers, chain saws, polesaws, brushcutters, and leaf blowers .  Dirt bikes .