A trials bike and a RAV4 take us to school. ... It would take a passing grade after a day of riding exercises on the four-stroke dirt bikes to get a shot at the trials bike exotica the next morning.

It's evident that 450cc four-stroke dirt bikes are faster than 250cc two-strokes. If the 450 wasn't faster, professional motocross and supercross riders would be racing 250cc two-strokes.

The development of the four-stroke single cylinder motor is exactly as old as the internal combustion engine, but the needs of the motorcycle are still being understood. Accordingly, Husaberg’s ...

Ratcliffe goes on to drop a few extra deets: roughly 18 months until the four-stroke is here, with the £33,600 of the two-stroke indicating a similarly top-shelf pricetag for the newbie. Naturally, ...

The big news in Honda's 2007 range of off-road bikes and quads, launched this week at Thaba Ya Batswana, south of Johannesburg, is the new CRF150RB four-stroke motocrosser.