Wp 4860 fork shim stack pdf

Shim stacks explained by eric neeley, suspension design engineer at rockshox. Need help tuning your king shocks, contact us directly for ononone help. Allows you to properly torque the fork cap assemblies during installation. Vc2a single stage stacks figure 1 a single stage stack is a twopart stack made up of a combination of a lo. Frontfork 4860 mx multi adjuster 2003 karlstroms motor. Dec 28, 20 float is the amount that the shim stack can move on shaft itll make sense when you look at it. Jun 25, 20 shim stacks explained by eric neeley, suspension design engineer at rockshox. Lets reassemble this new shim valve stack on the base valve, and get it ready to go back into the forks. Essentially, when the oil moves through the shim stacks it is also moving through a bleed hole. It includes everything you need to know in order to care for your wp forks. The small diameter shim at the end of a shim stack is usually reffered to as the transition shim, if there is another stack postitioned behind it. In the case of the 4cs fork, one pattern we noticed missing was low speed damping control.

Using a wp oc fork manual just give ggl a hit using wp 4860. Simply snap off individual shims to get the thickness you need. With so many available sizes, shimstack shims can be used to align windows, doors, curtainwalls, storefront tubing and other architectural components. The new design is a major departure from their controversial 4cs fork. Ktm 990 shim stack base valve assembly pt3 youtube. Technical data fork technical data fork fork part number 14. The development work on the 2015 4cs forks for all usabound ktms was done inhouse by ktms american test department along with the wp factory services staff. As the riding season rapidly approaches, most riders are looking to get their. Fits 2014 ktm xc models and all 202014 husaberg with wp 4860 4cs forks for removing and installing lh and rh adjustable fork caps allows you to properly torque the fork cap assemblies during installation. Owners manual and suspension setup guide squarespace. Ktm s forks come with different oil heights for each model. After testing hundreds of different valving configurations not just shim stacks, but any and all internal parts that affect damping, we begin to see patterns. Advice on wp ktm shim stack please motorcycle suspension.

The wp 4cs fork is made from quality parts with a nice finish. Aug 20, 2015 wp s new airspring fork is already available on european ktm motocross models, and it will likely be introduced in the us on 2017 ktms. These are very high quality with spring rates not available from wp or other manufacturers. The same wp 4860 forks are used on the 450 and 500 exc, xc, and mx models, but they have 50 mm more travel due to different internalsdamping cartridgecase lengths. Aug 10, 2017 the process will be the same for multiple years and bike models with the wp 48mm open chamber forks. To the point is a series of articles that explains the ins and outs of your bike every tuesday. Wp fork springs wp48mm 44mm x 465mm ktm, berg, hqv wp 4cs. Husaberg motorcycle front suspension husaberg wiki. He rode more hare scrambles as a c rider which i am too. Calculation of the deflection of the stack structure alone is inadequate to evaluate shock absorbers performance. Float is the amount that the shim stack can move on shaft itll make sense when you look at it. This manual covers the following we specialize in repair manuals, owners manuals and parts manuals.

Introduction this repair manual offers extensiv repairinstructions and is an uptodate version that describes the latest models of the series. Top cap removal tool for 2014 ktm xc models and all 202014 husaberg with wp 4860 4cs forks. Advrider wp forks on a dakar wilddogs wp fork conversion. If it is not, adjust the total thickness by changing the number of original packing shims the. Fork springs wp48mm 44mm x 465mm for ktm, husaberg, husqvarna wp 4cs. Wp fork valving wp conversion notes wp parts spreadsheet. This manual goes into greater detail for those who wish to learn more about fine tuning. How to rebuild fork seals on wp open chamber forks with.

Krooztune ktm wp aer 48 testing and development after the last few years with the 4cs system we were hoping for a good improvement with the bike in stock trim. The cheapest way to finetune the ktm s wp forks is to raise and lower the fork oil height to get the smoothest midstroke action without bottoming, which is why we lowered the oil height by 10cc. I know the aer 48 forks can be pretty dang awesome if set up right, but the 4cs seem to of been a problematic type fork. Wp fork springs wp48mm 44mm x 465mm ktm, berg, hqv wp. Regular you need next to the general equipment, the special tools of wp suspension.

Ktm, husaberg, wp 4cs fork springs made in europe and the usa for slavens racing. The design shares similarities with open cartridge forks, closed cartridge forks, and the ohlins ttx. Restackor shim stack force balance solves 5,000 simultaneous equations to determine the stack stiffness. Ktm wp 4860 mxma suspension fork workshop manual ebay. Page wp4357 wp4860 discs springs weight valving shims husa calcs graph bearings.

They come in a variety of sizes ranging from 6, 8, 12, and 16mm, id in metric and. And some of 2014 bikes that once ran the open bath fork may now be running the closed chamber fork that has been around since 2005, usually noted as the 4860 mxma cc. Crl shimstack shims give you fast, low cost leveling. The process will be the same for multiple years and bike models with the wp 48mm open chamber forks. We demonstrate how to successfully rebuild the forks on a 2015 ktm 300 xcw the process will be the same for multiple years and bike models with the wp 48mm open chamber forks. Wp ditched the forwardthinking design for one that is, in many ways, much more conventional. If you require to use the images for commercial purposes please contact me. Ride jbi chooses to only stock the best dirt bike fork parts to be used in your motorcycle and in jbi suspension services. Wps new airspring fork is already available on european ktm motocross models, and it will likely be introduced in the us on 2017 ktms. Te610 fork valving and shim stack tuning cafe husky. Wp 4860 mxma cc fork the following images can be used freely for private use.

Wasnt there an insert or something along those lines. On a normal base valve only fork, youll only have one or two shims on the compression side of the mid, with a spring and a large amount of float like 1. This is positioned behind the midspeed compression stack, in the same manner. The design used on wps aer air fork, however, means theres never any pressure on the fork seals. All of these compression shim stacks are on the same. Used by many top pros, wps cone valve forks and trax shock are a factory level setup. In other words it is a mix mash of ideas assembled into one. I ran the te610 shim stack in the restackor shim calculation program. Works fork parts is proud to offer an indepth selection of motorcycle fork parts for all suspension brands kyb, showa, wp, ohlins. After initial testing it was evident that the aer48 air fork equipped ktm range was a vast improvement over last years bikes with the 4cs setup. In the case of the 4cs fork, one pattern we noticed missing was low speed damping. The c2p brand shims are hiquality steel valve shims made with sandvic 20c material for the best possible consistency. This is 1 of the major drawbacks of the 4cs fork, as all over production forks kyb sss, showa twin chamber, showa tac, wp cc, wp cone valve, and wp aer utilize at least 2 or 3 different types of bottoming controls such as hydro stops, spring seats, and massively high air pressures that come with air forks. The stack thickness must fit within a specific range.

In the aer fork, the pressured air is all contained in a sealed inner cartridge, with a bypass for the negative chamber thats enacted at full forkleg extension when you go off a jump or sit the bike on a stand, for instance. I plotted it against my 12 wr300 and a stock drz400 i own one of those too. The next shim stack is called the high speed compression stack. Fork rebound gold valve installation shock treatment. To compute damping performance the fluid flow area and resistance through the deflected shim.

The gold valve allows the valving stack to control damping allowing a setup that is both plush initially and increasing bottoming resistance. This valve kit increase flow area, putting valving control on the shim stack. Mar 31, 2015 the development work on the 2015 4cs forks for all usabound ktms was done inhouse by ktms american test department along with the wp factory services staff. Motion pro cap socket for wp 4860 4cs forks revzilla. Wp 4860 at ktm motorcycle parts, accessories, and much more. No shims, therefore no loss of damping because of bent shims. I just purchased a 05 200exc and the suspension was done by pro action and the previous owner po is my weight, 165lbs. That extra 50 mm of compression capability on the oil and air spaces creates a larger ramp in pressure resistance near the end of travel. There is a larger range of springs for the 4860s but the larger diameter of the forks limits steering lock.

These forks are used in many sx and sxf models post 2007. King shock piston valving shim stacks are available in. However, the right to modifications in the interest of technical. Unlimited opening up of wp cone valve so harshness reduced. Some later model husabergs will also used these fork example pictured are from 20 ktm 350 sxf eu check your owner manual for the model of the fork that is on your motorbike. Pay attention to the following notes, when you are working with wp suspension products as described in this workshop manual. We work closely with wp as a wp authorized center one of only a few in the us. Pmk from ktmtalk said i maybe get lucky and get some advice from shock doc who frequents this site. Some, not all, of the 2014 bikes are using a 4chamber fork, which ktm notes as the 4860 4cs. Restackor computes the combined base and midvalve damping force used in mx suspension setups giving you the capability to tune each system using a thorough shim stack structure force balance to tune the complex stack structures used in motorcycle suspension setups. Cc stands for closed chamber, sometimes refered to as twin chamber or bladder fork. Put the valving on the shaft in the order listed, starting with the smallest diameter shim of the hispeed stack. How to rebuild fork seals on wp 48mm open chamber forks youtube. Its always good to have your bikes specific service manual on hand to follow the procedures.