Motocross – The two-engine produces more energy than four of the same capacity (cc), but oil must be introduced into the crankcase for consumers rod bearing lubrication, either with a pump or by mixing with the gasoline, this oil is burned, the characteristic odor of two stroke engine. Four stroke further drove in the specialist classes during this period, partly in the 500cc class. In the early 1980s, another wave of technological advances saw the typically two stroke air-cooled, two shock rear suspension machines replaced by machines, the water cooled and monoshock rear suspension. This led to even more machines within the existing displacement categories (125, 250 and 500cc).
A relatively new sport that is not racing, but focuses on the implementation of acrobatic stunts while jumping motocross bikes. The winner is selected by a panel of judges. The drivers are scored on style, difficulty level of the trick, the best use of the course, and often amount reactions as well.
A trick executed if the backflip Alto, was disputedly completed a 250cc motorcycle by Greg Chrin with a specially dirt ramp. Soon after that, Mike Metzger this trick with a standard freestyle and dirt landing pad. Recently Mike Metzger actually a back flip over the Caesar’s Palace fountains. Some think the body varial 360 as the most difficult stunt, which at that time. This trick also Carolla, was first performed by Chuck Carothers at the 2004 X Games. Previously, the backflip Alto 360, or off-axis backflip Alto, was widely considered the biggest challenge trick. Another driver under freestyle to a new level is Travis Pastrana. In 2006 he the world’s first double backflip Alto. At the 2006 X Games, Travis, the world’s first double backflip Alto (in the competition). It earned him the 2006 freestyle gold medal. The double backflip Alto is currently considered the most difficult Freestyle stunt.