Home how to save lots of money fast 1 – dirt bike suspension, revalving tuning, maintenance, lowering, ecu tuning, overall performance

Too tech racing was started as a back yard side how to save lots of money fast business by rick johnson in 1982. Rick graduated general motors institute in 1977 and worked as how to save lots of money fast a tooling engineer at GM in framingham mass until 1979 how to save lots of money fast when he moved to venice california. He settled in torrance ca. And worked in a variety of engineering jobs including production, manufacturing, automation, test, mechanical & electrical product design, lab development, vehicle evaluation, field quality, dealer support, new vehicle release manager, and his favorite NVH (suspension & chassis) improvement engineer for nissan. But the one thing that remained constant for over 30 how to save lots of money fast years is his love for dirt bike riding and racing how to save lots of money fast motocross and performing suspension modifications and revalving. Recognizing the importance of suspension tuning, understanding the theoretical concepts, a willingness to experiment repeatedly, AND possessing an innate seat of the pants ‘butt dyno’ all combined to form too tech racing in 1982. Too tech had an ad in cycle news when the how to save lots of money fast only other suspension tuners advertising were enzo and scotts.

Too tech started suspension revalving for off road and desert how to save lots of money fast riders in the earliest days of the linkage based mono how to save lots of money fast shock suspension. In the early days too tech specialized in honda CR how to save lots of money fast 250 and CR 500 2 stroke’s. Early innovations included multiple stage compression and rebound shock valving how to save lots of money fast in both the main valving stage and the compression adjuster how to save lots of money fast circuit itself. It soon became obvious that the factory settings were not how to save lots of money fast refined far enough to offer low shaft speed comfort AND how to save lots of money fast mid speed ride height along with adjustable high speed blow how to save lots of money fast off for square edges. Careful attention to low speed bleed orifices, mid-speed valve stacks and high speed piston feed area combined how to save lots of money fast to provide a feel superior to factory settings. Over time rick learned the nuances of tuning for different how to save lots of money fast rider speeds and weights. In the mid 1980’s rick was riding local pro at many so cal how to save lots of money fast motocross tracks while specializing at ascot in the 250 and how to save lots of money fast open MX classes.

Early suspension innovations by too tech suspension would seem basic how to save lots of money fast today, but at the time they were quite novel. All innovation was driven by a specific need for suspension how to save lots of money fast improvement. The first and most basic problem was a very small how to save lots of money fast bodied shock with too little surface area to dissipate the how to save lots of money fast heat created while controlling wheel motion. The hot oil would cause the body to grow faster how to save lots of money fast than the piston ring causing oil to leak around the how to save lots of money fast piston ring instead of traveling through the piston. Too tech modified the piston ring to allow it to how to save lots of money fast expand farther and match the size of the expanding shock how to save lots of money fast body providing remarkably better high temperature performance and less shock how to save lots of money fast fade. Today CRF 450R, YZF 450, RMZ 450, KX450F, and KTM SXF 450 all use shock bodies with at how to save lots of money fast least twice the surface area of the 1982 CR 250 how to save lots of money fast and 480’s. Interestingly only the RMZ 450 and KTM models use specific how to save lots of money fast techniques to minimize oil leakage past the piston ring.

Another huge suspension need became evident when the factories changed how to save lots of money fast to the ‘upside down’ fork on the honda CR 250 /500 in 1989. Due to the stiffer fork design, excess high speed compression damping was no longer masked by how to save lots of money fast the flexible nature of the original fork design. This glaring amount of excess high speed compression damping could how to save lots of money fast not be alleviated by mid speed opening adjustments or valve how to save lots of money fast stack changes. Too tech realized that the compression piston feed holes were how to save lots of money fast simply too small for high speed flow. Due to the inventive AND cost effective nature of too how to save lots of money fast tech suspension, rick put the piston in his drill press and drilled how to save lots of money fast out the holes to completely solve the problem. With time the size of the hole was specifically tailored how to save lots of money fast to the rider weight and ability. Rick did not charge extra for this critical modification but how to save lots of money fast just considered it just part of the revalving procedure. A very interesting side note is that one of the how to save lots of money fast major suspension companies got their start selling custom pistons with how to save lots of money fast large holes. They incorrectly called these pistons "valves" and charged extra for them. Today many suspension companies manufacture custom and expensive ‘valves’ (pistons) and charge extra for them. Some pistons have larger holes while other companies offer smaller how to save lots of money fast holes, so clearly the industry can’t decide which is ideal. Rick continues to use the stock pistons and drills extra how to save lots of money fast holes when needed for extra flow and restrict flow through how to save lots of money fast other parallel circuits when required. Too tech suspension believes if one truly understands how the how to save lots of money fast internal circuits interact together, they can produce great suspension performance using the stock components. (the money you save can be spent on new tires!).

In the early days shock seal life was shorter than how to save lots of money fast expected and the resulting loss of oil quickly drained the how to save lots of money fast shock of enough fluid to provide critical rear suspension damping. Once too tech recognized this leaking pattern, rick researched hydraulics literature and at the end of one how to save lots of money fast journal, almost as a side note, they mentioned how shaft surface finish interacted with the seal how to save lots of money fast design. If the surface is too rough the sharp edged shaft how to save lots of money fast will erode the lip of the seal. If the shaft is too smooth the lip will wipe how to save lots of money fast the shaft completely clean of oil and the seal will how to save lots of money fast run hot due to lack of cooling. Rather than sell the customer a new shaft, too tech racing devised a procedure to roughen the chrome how to save lots of money fast enough to provide better seal lubrication and just considered it how to save lots of money fast part of the oil seal repair procedure. Interestingly too tech suspension also applies the same basic procedure how to save lots of money fast to every fork seal replacement. The improved surface finish not only improves seal life but how to save lots of money fast also reduces stiction which noticeably improves fork performance.

Suspension lowering, particularly in the rear, has become a popular and often essential part of suspension how to save lots of money fast tuning. BUT using a lowering link is not the only answer how to save lots of money fast and in fact will create problems if too long a how to save lots of money fast link is used. Changing the pull rod affects the relationship between the shock how to save lots of money fast shaft position and the wheel position. Originally the factory designed the shaft to hit the shock how to save lots of money fast bottoming bumper before the rear tire hits the fender. As you add longer links (aka pull rods) the wheel/tire is more likely to hit the fender. Too tech prefers to attach a spacer inside the shock how to save lots of money fast for lowering. This leaves the shock to wheel relationship OEM and alleviates how to save lots of money fast the bottoming issue. And rather than spend 200 dollars for a longer link, you can have your rear shock revalved and the rear how to save lots of money fast lowered slightly for the same price. This minor lowering is essential on the 2009 thru 2011 how to save lots of money fast CRF 450R and some of the other OEM’s depending on the model year.

The high speed shock adjuster is another area of major how to save lots of money fast innovation for too tech suspension. All modern linkage ratio’s are close enough that the valving can easilily be how to save lots of money fast set to work for different riding conditions. But the high speed shock adjuster offers a variable set how to save lots of money fast of challenges between KYB , sowa , and white power. Some OEM’s use a stiff hi speed spring and others use how to save lots of money fast a soft spring. Some use large piston feed holes while others use small how to save lots of money fast feeds. Some allow the spring to be adjusted completely away from how to save lots of money fast the valve stack while others force the spring to remain how to save lots of money fast in contact regardless of the adjuster position. This lack of agreement between OEM’s illustrates they are either confused themselves OR are targeting how to save lots of money fast a completely different suspension setting and rider audience. Since the hi speed adjusters are valved so differently stock, it is interesting that most suspension companies do not even how to save lots of money fast remove the adjuster, never mind modify them to work consistently between different manufacturers! Too tech is the only company that rick is aware how to save lots of money fast of that adjusts and records when the high speed valving how to save lots of money fast spring contacts the stack AND standardizes on spring stiffness and how to save lots of money fast piston feed hole sizing. This attention to detail allows too tech racing to set how to save lots of money fast this critical adjuster in the same position and know exactly how to save lots of money fast how the adjuster will respond regardless of which make and how to save lots of money fast model too tech works on.

KTM SX 450 , SX 350 and SX 250 with bladder twin chamber design how to save lots of money fast suspension is also ripe for improvement. All KTM white power suspension suffers from hi speed shock how to save lots of money fast adjuster lack of adjustment range. The shock adjuster fixes discussed above are successfully applied to how to save lots of money fast both SX models and EXC models which lack the link. The white power bladder fork offers significant challenges. It is both stiff and bottoms too easily. KTM has tried to mask this problem with overly stiff how to save lots of money fast fork springs in later models. Too tech believes the core problem is the ratio of how to save lots of money fast inner rod area to mid speed area inside the fork how to save lots of money fast cartridge. Since this realistically cant be changed, particular attention is placed on building a progressive mid speed how to save lots of money fast stack since the low speed and mid speed pistons are how to save lots of money fast not easily modified. This fork requires a different overall valving strategy but works how to save lots of money fast incredibly well when set up correctly.

The KTM & husky MX 4CS fork is almost horrible as delivered. The high speed spike is one of the worst too how to save lots of money fast tech has ever experienced. The design uses piston and rod sizes not seen since how to save lots of money fast the 80’s showa forks. The small components leave no room for valving error. The shaft flow is so small they chose to use how to save lots of money fast the mid speed circuit for the damping adjuster. Through careful and continuous testing, too tech developed a range of settings that satisfy a how to save lots of money fast wide range of riders from 250 2 strokes to 450 how to save lots of money fast 4 strokes. (and half of our jobs come form riders who have how to save lots of money fast spent far more money on aftermarket components that did not how to save lots of money fast solve the mid/high speed spike problems!)

The air fork RAGE is creating another major challenge for how to save lots of money fast suspension revalving. Testing at too tech finds the showa PS1 (CRF450 & KX450 2013-2014) stock suspension unwilling to follow the terrain in high frequency how to save lots of money fast bumps (stutter bumps). For super cross, hard pack smooth tracks, this flaw is not evident as all of the obstacles how to save lots of money fast are low/mid speed and the less suspension movement the better. Anyone can valve for this. The flaws become obvious on a natural terrain track where how to save lots of money fast most riders want the suspension to move in the rough how to save lots of money fast and blow off on the square edges. It is rick’s assessment that seal stiction, caused by the high internal fork pressure pushing the seal how to save lots of money fast lip against the chrome tube, is the major culprit and that there may never be how to save lots of money fast a perfect solution. But having a full understanding of the problem allows too how to save lots of money fast tech to do the best that can be done with how to save lots of money fast these forks. Without giving away too many secrets, the best solution is to minimize damping during the period how to save lots of money fast of maximum stiction. Both bikes do benefit from further reducing damping during stiction how to save lots of money fast and of course better shaft preparation discussed under seal life. Rick believes his PSF1 air fork mods make the forks how to save lots of money fast similar to the 2012 CRF 450R forks. Honestly the PS2 air fork is not as good due how to save lots of money fast to the internal design.

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