Motocross is a form of motorcycle or all-terrain vehicle racing held on enclosed off-road circuits and is the widely considered the world's most popular form of motorcycle racing. Motocross is derived from the French, and was originally called Scrambling when the sport was invented in the UK. The name "motocross" is a contraction derived from the words "Motorcycle" and "Cross Country". Motocross is often abbreviated as MX.The Motocross tracks are often quite large and incorporate natural terrain features with very few man made jumps, unlike Supercross, a sport that was originally derived from Motocross and is executed on a smaller track with more extreme man made obstacles. It is not unheard of for a Motocross track to be made up entirely of hills and turns with no jumps at all. Due to the size of the track, motocross races often include more than 40 racers whereas Supercross races are generally limited to about 25.
The Professional Motocross races are measured by time.... A typical Pro race will run for 30 minutes, then once the leader crosses the finish line that lap, he is given a signal indicating there are two laps remaining. A one-lap-to-go signal is given at the start of the final lap, and the race is completed at the end of that lap. This format is known as 30 minutes plus 2 laps.
Other formats Motocross race may be determined by laps. In each race there is a set number of laps and the first rider to complete the set number of laps is the victor. The first three riders that finish first are declared the podium riders because of the first through third positions in the race. Races are ran in sessions called motos. There are two motos in a race and the riders place in those heats are averaged together to get their overall finish.
Machine motorcycles are lightweight and powered by highly tuned two-stroke or four-stroke engines (but usually geared for quick acceleration rather than very high speeds). . They have knobby tires for traction on loose surfaces, a highly absorbent suspension designed to cope with the shock of heavy landings, and short gearing desig[Photo]ned for swift acceleration rather than high top speed. They feature hinged footpegs and levers so that they simply fold rather than bend or snap when the machine is inevitably dropped.
Machine motorcycles are lightweight and powered by highly tuned two-stroke or four-stroke engines (but usually geared for quick acceleration rather than very high speeds). . They have knobby tires for traction on loose surfaces, a highly absorbent suspension designed to cope with the shock of heavy landings, and short gearing desig[Photo]ned for swift acceleration rather than high top speed. They feature hinged footpegs and levers so that they simply fold rather than bend or snap when the machine is inevitably dropped.Also the exhaust may be routed carefully so that a fall will not damage the exhaust, nor bend it so that it would obstruct the rear swing arm's travel - something that does happen to road bikes. The saddle (seat) is curiously shaped, in a long banana, to extend from rear of the fuel tank to the rear fender. This offers the rider greater protection when he or she hits bumps or lands hard and allows the rider to move and distribute his or her weight over the front or rear of the bike. This will affect rotation pitch while jumping and greater traction to the front wheel when necessary on the ground.
Lowering the rider's center of gravity (sitting) greatly increases the ability to go through a turn at higher speeds. Sitting further back and accelerating hard over a series of bumps or ("whoops") keeps the front tire from dropping into any large gaps between them and causing you to lose control of the bike. The gyroscopic effect of the engine along with the wheels makes jumping the "motocross" bike over long distances possible - this effect keeps the bike from rotating through any axis other than the axis of the wheels while in the air.A common technique to change the attitude of the bike in air involves the use of the rear brake. When the rear wheel is decelerated while the bike is in mid-air, angular momentum is transferred from the wheel to the entire bike. This forces the front of the bike lower (and likewise, accelerating the rear wheel causes the front of the bike to rise), allowing the rider to force the bike to a specific position or attitude relative to the ground.Unusual for racing machines, motocross bikes can be purchased in a ready-to-race condition at moderate prices from major motorcycle manufacturers.
Professional riders, however, modify their machines further, both for outright performance and to have the bike's behaviour more in tune with their own preferences. The highly tuned machines of the professionals are called "factory bikes." The latest trend in motocross motorcycles is towards four-stroke engines. Although the four-strokes weigh more, they have much more power to back up the weight. These engines have been developed due to manufacturer's pressure and environmental concerns regarding the increased emissions of two-strokes. 2 strokes engines are still being developed none the less. They are widely used in the freestyle community. The 4 strokes still currently weigh to much and dont handle like the 2 strokes.Engine sizes ranges from 50cc right up to 550cc, although bikes with sidecars can have up 1000cc engines. Four stroke motocrossers do not compete on a truly level playing field. Currently, 250cc four strokes compete in the 125cc class and 450cc four strokes are used in the 250cc class. They are very competitive in these classes but need twice the displacement to rival a two-stroke. However, the popularity of four-stroke motocross bikes has been steadily increasing. Due to the increase in popularity and to non-matching displacements of four-s
troke and two-stroke motorcycles in the same classes, in the year 2005 the AMA changed the class names from 250cc to Pro, and from 125cc to Pro Lite. even Motocross : The object of the contest is to complete either a defined number of laps (usually three to seven for amateurs, more for professionals) or fixed time period (anything up to 40 minutes) first. A race typcially made up of two or three motos (or legs) with the scores combined to determine the overall result. There is a mass startMotocross racing is one of the most visually appealing forms of motorsport, with riders performing seemingly death-defying leaps, turns visibly at the edge of traction (as indicated by a sliding, spinning rear tire throwing dirt at all behind it), and the effort of riders clearly visible as they move their bodies around their motorcycles to balance the bikes for maximum speed.
troke and two-stroke motorcycles in the same classes, in the year 2005 the AMA changed the class names from 250cc to Pro, and from 125cc to Pro Lite. even Motocross : The object of the contest is to complete either a defined number of laps (usually three to seven for amateurs, more for professionals) or fixed time period (anything up to 40 minutes) first. A race typcially made up of two or three motos (or legs) with the scores combined to determine the overall result. There is a mass startMotocross racing is one of the most visually appealing forms of motorsport, with riders performing seemingly death-defying leaps, turns visibly at the edge of traction (as indicated by a sliding, spinning rear tire throwing dirt at all behind it), and the effort of riders clearly visible as they move their bodies around their motorcycles to balance the bikes for maximum speed.Recently the sport has evolved with sub disciplines like Supercross and Arenacross (both are indoor motocross), Freestyle (or FMX) (a display of jumping skill rather than racing), Supermoto (Motocross machines racing on both tarmac and off road) and vintage motocross (competitions with bikes usually pre-dating 1975).Motocross can be an entry sport for motorsports in general. Classes for children as young as 4 years old exist for competition on 50cc machines.
