Although they still exist, 2-stroke diesel engines aren't all that common, and 4-stroke engines are what you'll commonly see ...

We’re introduced to the traditional two-stroke diesel engine as thermally efficient but not smooth-running, and then the gas turbine as smooth but much more inefficient. The free piston engine ...

Every category of 2-stroke engines has a place in my heart, from 49-500cc, except for the 2-stroke featured in this video because, well, I had never seen a legitimate 600cc 2-stroke dirt bike before.