Every new internal combustion car and truck sold in America today is equipped with a four-stroke engine, as are the vast majority of motorcycles. Today, if you hear the loud, ringing song of a two ...

Refinements enhance KTM’s motocross lineup for 2026. Both the SX two-stroke and SX-F four-stroke ranges see mostly minor ...

Jinhui Liang, Dongdong Zhang, Shuwen Wang, Vibration characteristic analysis of single-cylinder two-stroke engine and mounting system optimization design, Science Progress (1933-), Vol. 103, No. 3 ...

At one time, two-stroke dirt bikes dominated the motocross and supercross racing scene. That is until about 20 years ago, when the two-stroke engine disappeared from motocross above the youth levels.