Two stroke cycle

The two-stroke type of internal combustion engine is typically used in utility or recreational applications which require relatively small, inexpensive, and mechanically simple motors (chainsaws, jetskis, motorcycles, etc).

In simple terms, the upward stroke of the piston draws a fuel-air mixture into the cylinder, which is then ignited - forcing the piston downward again, expelling exhaust gases and doing the mechanical work desired from the motor?.