Motorcycle Suspension Bible. • Suspension Tuning, Repair, and Maintenance. • Designing Custom Suspension Systems. • Modifying and Upgrading Stock. Race Tech's Motorcycle Suspension kaz-news.info - Ebook download as PDF File . pdf) or read book online. Editorial Reviews. Review. “Race Tech's Motorcycle Suspension Bible provides a clear understanding of the most misunderstood aspect of motorcycle.
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Books Download Race Tech s Motorcycle Suspension Bible [PDF] by Paul Thede Read Full Online "Click Visit button" to access full FREE ebook. Motorcycle Suspension Bible By Paul Thede Jun 19 [PDF] [EPUB] -. RACE TECHS MOTORCYCLE SUSPENSION BIBLE BY PAUL. RACH TECH'S MOTORCYCLE SUSPENSION BIBLE. Based on Paul Thede's wildly popular Race Tech Suspension Seminars taught around the world, this.
The object in this case is a steel bar, one end of which is connected or mounted to the frame of the vehicle while the other end is connected to the wishbone. The wishbone serves as a lever. If you hit a bump, the upward movement of the wheel is transmitted to the wishbone which also moves the torsion bar.
This twists the torsion bar along its axis, giving it its spring action. European automotive manufacturers as well as Chrysler and Packard in the US used this system in the 50s and 60s. Air springs There is another type of spring mechanism that relies on the power delivered y an air compressor.
Known as air spring suspension, this is mostly found in trucks and buses as well as luxury passenger cars because of the smoothness of its operation as well as consistently good ride quality.
Air springs used the compressive abilities of air in absorbing vibrations and shocks. Today, electronically controlled air suspension systems come with self-leveling functionality as well as raising and lowering modes.
Try pressing on an ordinary spring and it will continue to bounce several times before it comes to a complete stop. This continuous bouncing action of the spring must be controlled.
And this is the primary purpose of a shock absorber, suspension strut, and anti-sway bar. Shock absorber In general, a shock absorber is a device that slows down the springing action of the suspension springs while also reducing the magnitude of vibrations. What it does is that it converts this kinetic energy into thermal energy where it can be dissipated with the help of hydraulic fluid.
It is best to view a shock absorber as an oil pump that is located between the wheels and the frame of your car. The upper mount of the shock absorber is connected to a piston rod. The piston rod, in turn, connects to a piston that sits in a hydraulic fluid-filled tube. An inner tube serves as the pressure chamber while the outer tube serves as the reservoir for excess hydraulic fluid.
When you hit a bump, the wheel transfers the energy to the springs which, in turn, transmit the energy to the upper mount, the piston rod, and down the piston. Small holes are located on the surface of the piston, allowing hydraulic fluid to leak through with each movement of the piston inside the pressure tube. Because the tiny holes only allow small amounts of hydraulic fluid to pass through, this slows down the general movement of the piston.
As a result, the spring movement also slows down. It should be fairly obvious that there are two cycles in this operation of the shock absorber. First is the compression which refers to the downward movement of the piston which ultimately compresses the hydraulic fluid below the piston. The second part is the extension cycle which refers to the upward movement of the piston, compressing the hydraulic fluid above the piston. Technically, the compression cycle helps control unsprung weight while the extension cycle controls sprung weight.
There is another characteristic that all types of shock absorbers have — they are velocity-sensitive. As you increase the movement of the suspension, the greater the resistance that the shock absorber provides. This allows shock absorbers to seamlessly adjust to prevailing road conditions and help control any and all of the unnecessary and unwanted motions that can transpire in a moving car. This can include sway, acceleration squat, bounce, and brake dive.
Suspension struts There is another dampening mechanism that typically works like a shock absorber. This is the suspension strut or simply strut. A suspension strut is actually a shock absorber that is already mounted inside a coil spring, essentially two suspension components in one. Anti-sway bars While not necessarily an integral part of a vehicle suspension system, anti-sway bars or anti-roll bars can, nevertheless provide additional stability for any moving vehicle.
Anti-sway bars are metal rods that join the opposing suspension systems on the same axle and are often used in tandem with suspension struts or shock absorbers. When there is movement in the suspension of one wheel, this movement is transferred by the anti-sway bar to the other wheel to create a more even or more level ride. This also helps reduce the swaying tendency of the vehicle especially when turning.
Types of Suspension Cars typically have different suspension systems for the front and rear axles with each axle providing mounting for two wheels on opposite ends. The type of suspension on any given car is thus determined by the arrangement of the axle; whether it allows for the independent movement of the individual wheels or binds the wheels to the axle. Dependent front suspension We have already described this in our discussion on how suspension systems work.
Race Tech's Motorcycle Suspension Bible.pdf
To review, just imagine a rigid bar that connects to the front wheels and typically supported by shock absorbers and leaf springs. There are 3 reasons why some people hate this kind of arrangement. Second, it increases unsprung weight. Third, it is difficult to adjust the wheel alignment because of the rigid axle.
Independent front suspension As you may have already guessed, this type of front suspension allows the wheels to move independent of each other, except when they are joined by an anti-sway bar. There are several subtypes of this car suspension system. These include the following. MacPherson suspension strut This is the most widely used front suspension system today, but most especially by European brands.
It is best described as a shock absorber built inside a coil spring to function as a single cohesive unit. It is more specific for front wheel drive cars. Double wishbone This is also known as A-arm suspension because of its unique A-shaped design.
The system also features a coil spring and shock absorber. These are typically used in larger cars and sedans because of the way they help minimize sway while allowing for greater consistency in the steering feel. There are several types of double wishbone configurations. We already described the Coil Spring Type 1 design above.
The Coil Spring Type 2 differs in the placement of the coil spring and shock absorber combination.
Instead of this located between the two A-arms, it is positioned just above the upper A-arm. It really is not a very popular configuration since shock and spring combination essentially eats up precious vertical space. The latest double wishbone configuration, typically seen in the A4 and A8 of Audi, is the multi-link suspension. The only difference here is in the way the A-arm is broken down into component sub-arms, generally featuring complex pivot systems. Many say this allows for better road-holding abilities because the multiple joints can be adjusted in infinite configurations for best riding comfort.
Trailing arm suspension You can think of this as something similar to a double wishbone except that you have especially shaped suspension arms that are connected to the chassis. These arms move parallel to the chassis.
And you can perhaps appreciate this more on a VW Beetle. Twin I-beam suspension This front suspension system is seen almost exclusively on the F-series trucks of Ford.
It combines solid beam axle with trailing arm suspension. The beam axle is split in two, eliminating the issues seen in dependent front suspension systems. If not, then a mountain bike or racing bike with rubber suspension systems will give you an idea of how the system operates. Basically, the Moulton design replaces the coil spring and shock absorber configuration with a solid mass of rubber.
Transverse leaf spring suspension Most car enthusiasts find this system odd since it integrates leaf spring with independent double wishbone mechanism instead of the usual coil spring. A leaf spring is positioned across the entire width of the vehicle and connected to the lower A-arms of the double wishbone on both sides. The center of the leaf spring is mounted to the subframe of the vehicle.
As such, it is quite common to see many cars use dependent systems for the rear axle. Here are some of them. Solid axle This has got to be one of the simplest and easiest to set up. You have either leaf spring or coil spring mounted on both ends of the drive axle. It may not look elegant but it sure is simple and cheap.
If a coil spring is used instead of the leaf spring, control arms are required to provide lateral support. Beam axle This type of dependent rear suspension is generally found in cars with front wheel drive systems since the drive axle is located up front. One of the distinguishing features of the beam axle rear suspension is the presence of a panhard rod or track bar.
This is a piece of metal that runs diagonally from one end of the beam to a point in the opposite spring mount or opposite control arm. It comes in triangulated and parallel configurations. It is the favorite system used by street rodders and even those that ride classic hot rods. De Dion suspension This is a rather odd combination of a trailing arm fully independent suspension and a solid beam live axle suspension.
While it is weird, it does offer a few advantages such as greater traction and reduced unsprung weight. Unfortunately, it is also weighed down by a host of disadvantages like requiring two CV joints for each axle which adds weight and complexity.
The brakes are also mounted inboard which requires the dismantling of the entire suspension system should you decide to change your brake disc. Independent rear suspension The same independent front suspension systems can also be used in the rear to provide for a vehicle that truly deserves the badge of having 4-wheel independent suspension. The thing is that the overall cost will depend on the extent of the damage or the kind of repair that needs to be performed, the make and model of your car, and your very own DIY repair capabilities.
Suspension struts, springs, and shocks are typically engineered to last long. Under normal driving conditions with very minimal potholes, bumps, and other road surface problems, struts and shocks can actually last up to 10 years. Generally, most car manufacturers recommend changing the shock absorber every 40, or 50, miles.
However, a better recommendation is to have the suspension system inspected at 40, miles and then annually thereafter.
Why are My Shocks Squeaking? A squeaky suspension can put you in an embarrassing situation. The good news is that squeaking noise coming from your suspension can be due to issues in the bushings.
It is possible that there is a tear in the rubber or even the bushing has already worn out completely. Sometimes, it is also possible that the squeaking sound actually originated from inside the metal sleeve located within the bushing itself. It is also possible that the squeaking sound comes from a damaged rubber boot covering a ball joint or a worn or torn rubber mount. Whatever the case it is imperative that you have it checked immediately to identify the exact cause of the squeaking and for the appropriate management to be carried out immediately.
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Feb your correspondent can fix the issue himself. He is suffering from a bad connection, as you have correctly diagnosed. He first needs to disconnect the battery and leave it disconnected for one hour.
Then centralise the steering to the straight-ahead position and mark the steering wheel so it can be refitted accurately in the same position.
Next, remove the steering wheel, followed by the airbag. Using extreme care, clean the exposed contact points, then refit everything. This should extinguish the warning lamp. Similarly, the rear brake pads were almost worn to the limit and the pollen filter looked as though it had never been changed.During the late s and s, motorcycle rear suspension design and performance underwent tremendous advances.
Since forks act as hydraulic dampers, changing the weight of the fork oil will alter the damping rate. Whatever the case it is imperative that you have it checked immediately to identify the exact cause of the squeaking and for the appropriate management to be carried out immediately. This is an utter waste of power and gives you inconsistent handling.
Also, the springs or shims only allow flow in one direction, so one set of springs controls compression damping, and another rebound damping. Perform a bounce test on the suspension.
What are the Parts of a Car Suspension? You can almost imagine what will happen if all the weight of the vehicle will be shifted to only one side during cornering.
Total sag is set to optimize the initial position of the suspension to avoid bottoming out or topping out under normal riding conditions.
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