A: Oil is added to 2-stroke fuel for applications such as dirt bikes because the fuel doubles as a lubricant for the engine. A 4-stroke engine can burn that fuel, but it can cause issues.

Much like discussing religion and politics at a backyard BBQ, bringing up the debate of whether a 2-stroke dirt bike is faster than a 4-stroke is ... Honda detuned the engine to 56 horsepower ...

Yamaha points to "the push for more environmentally friendly machines" as the impetus for 4-stroke dirt bikes -- which sounds ...

125cc dirt bikes are popular amongst beginner-level riders ... and increased in size from 240 mm to 250 mm. In addition, a 4-stroke engine powers it. The bike is made partly of cast aluminum, making ...

Over the past half-century, dirt bikes have undergone ... first nail into the coffin of the two-stroke in motocross. The heavier engine stabilized the bike, delivered superior torque, and exposed ...

Two-stroke engines used to be ubiquitous in dirt bike racing, thanks to their lightweight construction and horsepower. Packed in a dirt bike frame, they make a motorcycle playful in the corners ...

If you've ever attended a Motocross race and heard the throaty growl of powerful four-stroke dirt bikes as the riders navigate the twists, turns, and jumps, it's hard to fathom a world where that ...