Car And Truck Brake Parts

Front Disc

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Front Disc
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In 1989, BMW released a motorcycle that shocked the motorcycle world. That bike was the BMW K1 and it was surprising for two reasons, its performance and the fact that it was built by BMW. At the time BMW had been known for making solid, reliable bikes but they were uninspired and dull. The K1 broke that mold and led to the present day BMW line up that includes many performance oriented machines such as the K1200S and K1200R.

At the time the K1 was built, a voluntary limit of 100 bhp restricted the power output of German motorcycles. In order to obtain the maximum amount of performance from the K1 BMW engineers decided to wrap the motorcycle in an all encompassing aerodynamic fairing. This decision also made a statement that in the future BMW would make bikes that were not only reliable but were exciting both to look at and to ride.

The K1 was powered by a 987cc, liquid cooled, double overhead cam, 16 valve inline four cylinder engine that produced 100 bhp at 8000 rpm. It used a five speed transmission and a shaft final drive. The engine sat in a tubular steel space frame. The suspension included a telescopic front and a mono shock rear. Twin disc brakes on the front and a single disc on the rear provided stopping power. The bike was a bit on the heavy side tipping the scales at 570 lbs. While being the sportiest and most powerful bike ever built by BMW, it was still not as powerful or fast as its contemporaries. It didn't possess gobs of torque at low speeds and the engine wasn't a fire breather but it did pull linearly up to its 8500 rpm redline. The bike excelled as a sports tourer and was at its best when traveling long distances at high speeds.

Like its motor, the big BMW's handling was not razor sharp but was adequate enough to get the job done. The K1 was heavy and required a moderate amount of force on the handlebars to turn, which proved to be advantageous for its role as a high speed touring motorcycle. The K1 could go all day on straight or long sweeping curves but when the road got twisty the K1 had to slow its pace to negotiate the turns.

The fairing of the K1 made long distance rides very comfortable. It did an excellent job of diverting the wind. The bike had great fuel economy and a long range. All in all the K1 was a great high speed touring motorcycle but it did have one drawback. It was sorely lacking in luggage space. The BMW K1 was not a pure sports bike but it was a success as a sports touring motorcycle. It was the first motorcycle to break the traditional BMW mold and led to the innovating and exciting bikes the company now makes.

At Edge On Motorcycling we want every ride to be your best ride. Come see us to get tips and strategies that will make you a more confident, skilled and capable rider. In addition you'll be eligible to enter our free monthly gear giveaway!

Herniated Disc Diagnosis

Herniated discs are one of the most common of all spinal abnormalities blamed for causing potentially severe and chronic back pain in multitudes of suffering patients each year.  While herniations can be problematic in the short term for a minority of patients, they are rarely responsible for causing the long term or excruciating pain that is inherent to their fearsome reputation. 

Herniated discs are the most common of all spinal irregularities.  They are diagnosed in untold numbers of people, both with and without back pain.  Herniations have become the bread and butter of the back pain industry and even enjoy a plethora of colorful nomenclature attached to their diagnosis.  The most common terms associated with disc pathologies include: disc herniation, bulging disc, ruptured disc, prolapsed disc, disc protrusion, slipped disc, collapsed disc and degenerated disc.  While these terminologies might have some circumstantial differences to some care providers, they are often used interchangeably, much to the confusion of the affected patient.

Herniated discs are theorized to create back pain through several distinct processes.  The most common of these causations is called foraminal stenosis.  This condition is often termed a pinched nerve.  Foraminal stenosis occurs when a herniation bulges into the neuroforaminal opening, impinging on the nerve root exiting the spine at that vertebral level.  While this process can indeed exist, it is diagnosed far more often than it truly occurs.  In order for the herniated disc to significantly affect the neurological functionality of the nerve root, the neuroforamen would have to be almost completely sealed off, which is a very rare event.  This diagnosis is commonly made even when there is no evidence that the herniation even touches the nerve root in question; forget about actually compressing it…

Spinal stenosis is the second most common disorder blamed on herniated discs.  Spinal stenosis describes a condition in which the herniation pushes against the actual spinal cord or cauda equina, limiting full neurological functionality from the entire spinal structure.  Spinal stenosis can be a very serious problem and might lead to such devastating symptoms as cauda equina syndrome.  Once again however, the diagnosis of spinal stenosis from a bulging disc is made very often, while the actual condition rarely ever exists, except in cases of extreme spinal trauma.  Typically, the herniated disc might come in contact with the membrane surrounding the spinal cord and spinal fluid.  A disc bulge touching this membrane does not mean that any effect will be passed along to the neurological function of the spinal cord.  In fact, many herniations impinge on the thecal sac completely unknown to an affected person, since the disc condition creates no symptoms whatsoever.

Chemical radiculitis is a less typical diagnosis commonly associated with severe annular tears in the outer disc wall or complete disc ruptures.  The interior of the intervertebral disc (called the nucleus pulposus) contains proteins which might cause nerve irritation in some individuals.  When the nucleus spills out of the disc structure, this protein can affect local nerve tissue, enacting radicular pain in the immediate area and the regions of the body served by the irritated nerve structure.  This is a somewhat controversial diagnosis, since many people experience full disc ruptures, yet have no pain at all.  It seems that only some people might be sensitive enough to suffer from considerable lasting pain after a chemical radiculitis event occurs.

Finally, discogenic pain is the last and least common of all diagnoses.  Discogenic means that the pain comes from the disc structure itself.  While the disc has no nerve endings or blood supply of its own, it is attached to the neighbor vertebrae by cartilaginous endplates which do contain tiny nerves.  It is these small nerves which are implicated in discogenic pain conditions, although most doctors who make the diagnosis are not always sure why the nerves hurt to begin with.  This diagnosis is certainly on very shaky ground in most instances…

Ironically, although herniated discs are blamed for a tremendous amount of pain, they are rarely the actual symptomatic source.  Most disc herniations are merely coincidental to any pain experienced and actually exist in a vast number of people who have no pain at all.  Generally, herniations due to trauma will most likely cause pain for a short time, although this discomfort might be severe.  Luckily, this condition usually resolves in 6 to 8 weeks, even without any medical treatment.  Herniations which exist due to the normal degenerative processes in the spine, such as the laughably named degenerative disc disease, are rarely painful, even in the short term.  Most of these degenerative induced bulges are not even discovered till many years later, since they raise no warning signs, cause no pain and exist innocently in the spine.  The possibility that any herniated disc might cause pain for months, years or even decades is highly unlikely.  Unfortunately, the mythology surrounding disc conditions, as well as the considerable nocebo effect of the diagnostic process, have both contributed to the current epidemic of disc related back pain. 

As a final thought, remember that herniated discs are a huge industry in the medical sector.  Doctors, chiropractors, complementary therapists, drug manufacturers, pharmaceutical suppliers, orthotic makers and a variety of other entities all profit hugely from disc pain.  If the reality of the average herniated disc ever became common knowledge, the viability of this extremely profitable business niche would be decimated.  Therefore, do not count on the diagnosis of disc herniations as a major source of pain decreasing any time soon…

About the Author

Sensei Adam Rostocki suffered with crippling misdiagnosed back pain for 18 years. Sensei Rostocki is the author of popular self help book, “Cure Back Pain Forever” (ISBN 1-59971-997-5). His Cure Back Pain Network Herniated Disc website provides honest and understandable information about a wide range of problematic disc concerns.

Is it possible to have a bike with rear disc brakes and front v brakes?

I am planning on buying a bike with full discbrakes. But i need to remove the front disc brakes to fit my hub electric motor. V brakes are the only brakes that can work with my hub motor. is it possibel to have a bike with v brakes in the front tire and disc brakes in rear tire? Thanks

Yes, it's possible but you need to be certain that the fork can accept V Brake studs.. most can. Make sure that the discs are mechanical (not hydraulic) or you'll also need a new brake lever.

If you were changing the front disc for a v brake just because you don't think you need a front brake as much, keep in mind that most of your braking... say 70%... should be done with the front brake.

Songwriter’s album debut benefits Detroit Charity
Singer, songwriter and guitarist Michael Bermudez will celebrate the release of his debut CD “Scattered Hopeless Hearts” with an in-person performance at 8 p.m today at the Berkley Front, 3087 W. 12 Mile in Berkley. Tickets are $7 in advance and $10 at the door. For information, call 313-833-4610 or e-mail gfluker@dcccmh.org.

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