AMA super cross has been around for a very long time. Since the early 1970s when the first race was in the super bowl and it was called super bowl motocross but then came the term and the start of supercross. In supercross these were tight cornering tracks with big jumps rhythm sections, and woops sections. The bikes that were first ever ran on these tracks were 2 stroke meaning they are high rpm bikes which of the time were the fastest bikes around of this time but there were a lot of issues with the bike which I will explain. Supercross has changed over time the bikes the tracks and the pace of the race.
To start off with some facts and information on a official 2stroke 125cc and 250cc race bike. The 2stroke dirt bike is a bike where the motor runs of a gas and oil mix where the gas and oil are mixed together in the gas tank. The dirt bike is also cooled by a radiator and coolant in the radiator. The coolant being antifreeze. The 2 stroke motor is a 2 cycle engine which means every 2 cycle of the engine there is 1 power stroke. The 2 stroke has a cylinder in which It has a two holes in the bottom of the cylinder when the piston comes down and the holes are opened the gases that were just burnt and exploded are pushed out of one hole by new air and new gases coming in through the other whole. Then the piston goes back up and closes the holes then compresses the air and the gas together then there is a spark from the sparkplug igniting the fuel and air mixer pushing the piston back down and restarting the cycle. Now this happened at and unbelievable rate. At 12,000 rpms the motor is spinning at 200 revolutions a second. So the motor is doing 200 of the cycles that I described to you above in 1 second. This ...
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...e fuel and air and then again the sparkplug provides a spark igniting the mixer creating the power stroke sending the piston back down restarting the cycle. This engine has a lot more compression and just takes straight gas and air. With a the oil being completely separated from the gas. This engine was a lot more reliable because it didn’t spin as fast and never got as hot it lasted a lot longer and barely ever need rebuilt. Just maintain like new oil, coolant, and a new spark plug was about all it took to keep these bike running and because they weren’t rebuilt between each race the bike would be no different than the one they had raced in the previous race thus keep the rider more comfortable and more in control of the power of the bike. This lead to faster lap times more safe bikes and in the end a whole new style of racing for the world of Supercross.
Looking up, you see that it is almost your turn. After getting off the hood of the car, you open the door, and sit inside the vehicle. As you firmly grasp the wooden steering wheel, the scent of unleaded gasoline fills the air, the rigid feel of the leather racing seat brushes skin, and the warm touch of chrome on the shifter radiates through the car. Sliding the key into the ignition, you turn it and hear the low grumble of the HiPo 302 cubic inch engine. You shift the car into first gear and begin to creep forward to the drag strip. You pull up to the starting line and wait. Looking over to the right and seeing your opponent eagerly awaiting the race in his red 1968 Camaro brings excitement. Overhead on the loudspeakers an announcer calls, “Up next, is a 1968 Camaro going against a 1965 Mustang Fastback. The Camaro is fitted with a 327 cubic inch engine and puts out about 210 horses while the Mustang has a 302 cubic inch high powered engine which cranks out 230 horsepower. This, ladies and gentlemen, will be a race of the ponies.” A shift into first gear sends a shiver of anticipation. You look at the light tree ahead and wait for it to turn green. It starts to count down. The first set of lights goes up. You begin to rev the engine to 2000 RPM’s. The second set of yellow lights goes up. The engine revs up even more. The car shakes slightly and the engine growls even louder. The third set of yellow lights goes up. The engine revs to 5000 RPM’s. The green lights go up. A quick dump of the clutch and the engine roars like a lion as it sprints down the track. The front end of the car lifts up and slams back down as the speed rapidly increases. The car screams as you shift into second gear. Looking over to the right, you glimpse the...
3.Combustion: As the piston reaches the top of its stroke or TDC, the spark plug fires, igniting the mixture. Due to the high compression of this mixture it is very volatile and it explodes when the spark is introduced. This pushes the piston downward and produces power.
Each nitro dragster is equipped with a custom supercharged and fuel injected engine, which is the real power of the beast. Another very crucial part of the car is its parachute launch system, which if he drivers didn't have would be a very rough and maybe lethal stop. Also one of the most powerful parts of the machine is the gas which is a nitromethane. The dragsters can use up to fifteen gallons of nitromethane in only one run. Another fascinating fact is that the dragsters are twenty five feet long and two thousand three hundred and thirty pounds. The top fuel dragsters pull eight gs on launch, and also have have amazing drivers who react to the start light in less than a tenth of a second.. The “fire breathing monsters of the NHRA” as they are called are a man mad true feat of engineering. When you look back at how the NHRA started you would be shocked and amazed by the mechanics and systems that go into each nitro drag
...eature in the Softail line for 2001s Twin Cam 88b; carburetion was used on the previous Twin Cam 88 models.
the craze in California. John Powers rode 150 miles on a racetrack in 6 hours, 43
he attached a four stoke piston engine to a wooden bicycle frame. For the next few year motorcycle remained larger experimental. During the early 1900’s with continual improvement they developed into useful vehicles. Today motorcycles have the same general appearance as easier models. But modern bike are earlier to handle and they have storage frames, more power engine are more efficient.
...r," in 1885, which he never patented. It had a steerable front wheel that had easier turning, equally sized wheels and a chain drive to the rear wheel. As with the original velocipede, safety bicycles had been much less comfortable than high-wheelers precisely because of the smaller wheel size. Bicycle historians often call this period the "golden age" because many people could ride the bike without dying or injuring themselves.
According to Robert Smith, the history of the bicycle goes like this: in the late 18th century and early 19th century, a two-wheeled vehicle with a wooden frame and a saddle, known as the celeripede ("fast feet") was developed in France. The celeripede had a fixed cross-bar and no pedals, meaning that it could not be steered very well and it was moved by running along the ground while straddling the saddle. Needless to say, it never became popular.
Bill Harley engineered the engine. He figured that he would need to make the cylinders reach the top of their stroke near simultaneous to take advantage of low range torque, and make the engine more dependable according to Rand Leffingwell, “Harley-Davidson; History & Mystique.” This created two lasting effects: The vibration and the exhaust sound for which Harley-Davidsons because famous.
The first models were petrol powered, as electrical lawn mowing devices had gone out of fashion due to the danger of electrocution after accidentally cutting the power cord. The original petrol powered trimmers where two stroke engines around 28 to 32 cubic centimetres in capacity powered by a mixture of “super” petrol and oil, today they are much the same with the exception of being powered by unleaded petrol and oil, but becoming more popular is the electric trimmer. A leader in engine technology Honda has taken the latest accomplishment, with Mini 4-Stroke engines. Powered by the only 360' inclinable (can be turned on any angle and still run properly) 4-stroke engine available today, the new Honda trimmers deliver smooth, dependable power and unsurpassed fuel efficiency. They require no special gas/oil mixtures so there's no chance for improperly mixed fuels.
Harley-Davidson, Inc. has a long-standing culture of relationship nurturing with its customers – of association with its customers on personal levels. Owing to this, customers look at Harley-Davidson as not only a company, but as also a family to whom they owe their loyalty. Harley-Davidson is an example of a company which has a loyal (brand) following and its customers aid in future sales via marketing based on the consumer. The company has been doing business since 1903; according to its website, “Four young men experimented with internal combustion in a tiny wooden shed. Not only did the shed not burn, but the motorcycle they built went on to serve over 100,000 miles” (Harley Davidson, n.d., p.1). William S. Harley in 1901 came up with a blueprint of a motor for fitting a bicycle. Arthur Davidson later joined him, and they then built the 1st Harley-Davidson motorcycle.
Seeing and selling bicycles for twenty-two years must have been boring for Schulte so he did some experimenting with different engines and fitted them into a bicycle frame to make his very own gas powered bicycle. With understudy Mauritz Schulte who also expiremnented with both Fafnir and J.A.Prestwich engines to be fitted into one of the Triumph
for a ride on their day off, they modified their bikes and turned a hobby of
Through much of my brothers perseverance, and a whole bunch of luck, the bike began to runfirst on one cylinder, then on both. I remember when Mike first got it running my dad and I looked on as he took the first ride around the yard; Im not sure if Mike knew it ahead of time or not, but the bike didnt have a functioning clutch. We soon discovered that rolling the motorcycle down a hill and then dropping it into gear wasnt too violent and was certainly good enough for the time being. Soon after, my dad and I were both allowed to ride; I think we both realized that if Mikes bike had been such a success on such little money (free, plus a few necessary parts) there were motorcycles in both of our futures.
...er moving parts and is inexpensive to design and build for utilitarian purposes, it dominates the moped and commuter bike market, particularly in third world countries where cheap transportation is the motorcycle’s primary function. There are two principal differences between the two- and four-stoke designs. The first and most significant is that the basic two-stroke has no camshaft or valves; the fuel/air mix flows into the cylinder through holes or ports cut directly into the cylinder liner. The second major difference is the way the engine is lubricated. Unlike a four-stroke engine, the two-stroke uses its crankcase as a passageway for the fuel/air mix. Because the crankcase is sealed and used during one phase of the intake and compression cycles, it’s impossible to use it to store oil as a four stroke does (even dry sump systems store some oil in the crankcase).