i got clocked out and i was flying at 13.9mph down a straight a way yesterday

There are lots of ways inertia is applied to motocross. I will start this off, add things as you think of them. First off, the definition of inertia is the resistance of an object to a change in its state of motion. (1) A heavier flywheel carries speed farther, but is also harder to slow down than a light one.

They've gotten lighter, better brakes, better bearings, more gears. They can have suspension in them for a comfier ride. Overall materials have been improved for better performance. For much of man's history on earth, he had two choices for getting around, either on foot or on the back of an animal (such as horses, mules, and wooly mammoths). Bicycles were developed to add another transportation option that multiplied human efficiency by a factor of approximately five.

But the history of bicycles is very fuzzy. Sources often disagree as to the names of the inventors and the dates of their inventions. Leonardo DaVinci sketched a facsimile of the modern bicycle in 1490. It was way ahead of its time and, as far as we know, never left the drawing board.

Around 1790 a French craftsman named de Sivrac developed a "Celerifere" running machine, which had two in-line wheels connected by a beam. The rider straddled the beam and propelled the Celerifere by pushing his feet on the ground, scooter fashion.

CelerifereBike.TIF (69800 bytes)In 1817 German Baron Karl von Drais added steering. Several versions appeared around France and England by the early 1800s. As a replacement for the horse, these "hobby horses" became a short-lived craze. The roads of the time were too rutted to allow for efficient wheeled transport.

Scottish blacksmith Kirkpatrick MacMillan developed a rear-drive bike in 1839 using a treadle and rod for the rear drive mechanism. But, he lived in the Northern British Isles where people and ideas traveled slowly, so his invention didn't spread. R.W. Thompson patented a pneumatic tube in 1845. Prior to this invention, bikes had metal wheels.

Boneshaker.TIF (43214 bytes)The French anointed Ernest Michaux "father of the bicycle," as he and his brother Pierre added cranks and pedals. Their Velocipede started a bicycle boom. The larger front wheel made it faster but less stable. The war of 1812 brought an end to the French bicycle boom.

British engineers were next to pick up the design and improve upon it by adding ball bearings, pneumatic (Dunlop) tires, wire-spoked wheels, chain drive, variable gears, and cable controls. Over a twenty-year span, the British brought the bicycle to its present form, thanks mainly to James Starley of the Coventry Sewing Machine Company. In 1885 the Starley Rover safety bike was born, returning wheels to a reasonable size and improving the bike's stability.

Safety.TIF (48898 bytes)In the early days, women's dress (corsets, pointed shoes, and voluminous skirts) limited their participation in this new sport. Newspapers of the day railed against the "sorcers" or bicycle speedsters.

Source: http://inventors.about.com/gi/dynamic/offsite.htm?site=http://www.footprintpress.com/Articles/historyBike.htm

First it didn't have any drive, you kicked yourself along with your feet on the ground.

Then someone put a pair of pedals on the front wheel.

After that the front wheel got bigger to get the speed up.

Then someone invented the chain and sprocket, which allowed the drive to move to the rear wheel and the front wheel to shrink to a more regular size. As a bonus thes bikes didn't flip over as easy during braking.

After that we've pretty much reached the modern bikes. Changes like multiple gears and suspension have been successful, but in principle smaller than the ones listed above.

george roeder from Ohio

there is no way to do a backflip on Jeremy mcgrath supercross world

Glen Hellen is the longst motocross track in professional racing! The track streches a good three in a half miles. Glen Hellen is the longst motocross track in professional racing! The track streches a good three in a half miles.

Travis Pastrana by far. First to do the double backflip and counless othe tricks. 14 x games medals, 3 of wich at one x games. He won the first freestyle event at x-games when he was 15.

Supercross started in 1972 when promoter Michael Goodwin set out to create what he considered to be the “Super Bowl of Motocross”.

Two of them are Superstar by Saliva, and Fat Lip by Sum-41

80,000 a yr and 2350 a month 1180 a week

Chad started his amateur career at 4.

43 litres

there are not that many, there are Caucasian, Asian and African, these 3 races spread into different directions across the world, hence we have so many people of different "colour" eg; the people in the Mediterranean are almost like an olive shade, Asian are more light beige Caucasian can go from pasty white to brownish, African can go from deepest ebony to light brown, then when people have children they can go either "colour" we all have the same "colour" blood bright red!! that is what makes us all human and brothers and sisters under the skin.

2 strokes are very reliable but you do have to do maintenance on them. I rode 2 strokes only up through 2000. I bought my first 4 stroke and had mixed feelings about it (had a lot of problems with it but loved it when it was running). I currently have both a 2 and 4 stroke that I ride regularly.

to get fired from your job

Regarding vehicles, a pink slip is the title to you vehicle.

yea but it's not a race bike it's a slow play bike

The 125 forks should fit the 250 as long as they are both the same frame style and close years.

I may be wrong but here i go:

and yellow outfit,

both bra straps showing,

To outside the box (you need to get in the action)

farting, burping enything gross

some one who never talks

you know that sort of stuff but if you want to find a man who loves you for who you are be your self

Bye

BMX started in the USA, so the first bikes were built there.

Ride your own race, know your abilities and your limitations. Don't get caught in the competition and go big off of a jump just because 2 or 3 other riders are doing it.

Let me give you some of my credentials first. Early in life I earned my pro license (the one you need to race supercross/outdoor nationals), and am now pursuing a degree in chemical engineering with a minor in physics. Thus, I now have ample experience in moto and a physical understanding of it, which I now delegate to share with you.

The idea of scrubbing is energy redirection. When your bike begins up the face of the jump, some of the energy it had from its velocity is stored in the suspension by loading it. The trick behind scrubbing is to redirect this stored energy from exploding upward, which will launch you upward, and waste precious seconds that could be used railing on the track. First step is to think of a diving board. This process much resembles the load/unload principle you experience in moto. you can either load up and extend your body, thus maximizing your launch, or bend your knees when you come down on the board, absorb the energy into your body, and minimize your height. Transforming this concept into being useful on your bike is the first step. When you reach the crest of the jump, allow your knees and elbows to buckle and absorb the energy in them. If properly executed, your butt should hit the seat, and you will "feel" the energy redirected into your body. No matter your skill level, this technique can be used, especially when exhausted at the end of a long moto, to save some time.

In a more advanced exercise, and after dialing the first step down, you can begin practicing all out scrubbing. This technique is more of an art, and always finishes with a touch of personalized pizzaz. Before attempting a scrub, identify which side you are comfortable whipping with. This preference will establish which way you will scrub. But fist, I cannot emphasize enough, YOU HAVE TO BE ABLE TO WHIP THE BIKE WELL FIRST!!!!!! Once comfortable with wipping, you can carry this concept into scrubbing. Approach the face of the jump on the same side as the way you will whip (if you whip the back of the bike to the left, approach the left side of the jump, and do the same for the right.) As you approach, stand tall and aggressive (pitched towards the front of the bike.) As you approach the crest of the jump, use your legs and arms to roll the bike downward and the back of the bike to the side of your whipping preference. The technique of absorbing the energy of the bike with your body, outlined above, should be simultaneously employed (scrubbing is a convoluted subject!!!) Turning the bars in towards the face is an advanced exercise that should only be practiced when holding them straight is perfected, as it only helps to absorb a little more energy. When perfected, at the top of the jump, it should feel like your bike is washing out, as it would if you were trying to rail through a flat corner with too much aggression. This is where the advantage comes from, if your bike is laid flat, the suspension will unload horizontally, and none of the energy will be transformed into a vertical explosion upward into the sky. Turning the bars into the face only helps you lay the bike more flat, and while helping to minimize energy transformation, is much more difficult to save. Once you leave the face of the jump, your attention will re-focus into saving it. Use your legs to straighten the bike out, and focus on your landing point in an attempt to return to vertical riding position to save your landing and a possible ride in an ambulance (I've been there when trying to show off for a camera, one such instance can be found on my old myspace account www.myspace.com/reynolds188).

On a final note, scrubbing is an incremental procedure, and small steps, on small jumps, should be perfected before becoming more and more aggressive in your approach. Practice it over and over on small hits before going all out and trying to look like bubba, or you will earn a date in the operating room and 6 months in a wheelchair!!!!

dirt-biking is for dirt-bikes it can be either stunt or mud riding

Helmets, like all types of clothing, are available in different sizes.