Koni provides an adjustment facility in most of their shock absorbers (there is a small range that are not adjustable), in order to provide a wear compensation or life extending mechanism.  The shock absorber is supplied in the softest setting and is correct for the car.

If the vehicle is fitted with firmer aftermarket springs, or there is a particular requirement for higher damping forces, the shock absorber can be adjusted to suit.  Full adjustment (full hard) is not recommended. As a general guide, when adjustment is necessary, increase the rebound adjustment by half to one turn.  Please contact Toperformance for further advice or comment.

 

Adjustment Procedure 26, 28, 30 Series

  • Rebound adjustable, the adjustment is made with the shock fully extended.

    1. Remove the dust cover and expose the adjusting button (figure 2).
    2. Hold the damper body by hand where the piston rod emerges from the cylinder. Push the button carefully, by hand, and hold it in that position (figure 1 & 2). (Do not use any device, other than by hand to depress button).
    3. The adjusting device has been provided with a number of clearly distinguishable stops (clicks), each of which marks an adjustment position (zero + 3 clicks = 4 positions).
    4. The damper may have already been adjusted earlier. Therefore, check whether the shock absorber is in the adjustment position by turning the piston rod to the left (counterclockwise) with the other hand until the zero-stop is felt – DO NOT USE FORCE!
    5. To increase rebound, turn the piston rod one or more clicks to the right (clockwise), and release the adjusting button.
    6. Be sure the adjusting button fully springs back into position. As long as the button is depressed, do not turn the piston rod further; otherwise correct adjustment will be disturbed. As soon as the button has made its complete return, the piston rod may be turned freely. The damper can now be refitted.

  • Rebound Adjustment Direction:
    Clockwise: Firmer
    Counter Clockwise: Softer


Adjustment Procedure 80, 82, 86, 87, 88, 90, 8040, 8240 Series

 

Rebound adjustable, the adjustment is made with the shock fully compressed.

  1. Remove the shock absorber from the vehicle and hold it vertically with the lower eye or pin attached in a vise. Use clamp plates to prevent damage.
  2. Some shock absorbers include a bump rubber concealed under the dust cover and it must be removed prior to adjusting. (the bump rubber can be pushed down by inserting a rod through the 2 holes at the top of the dust cover. When the rubber can be seen below the dust cover, it can be removed from the shaft as it is “split”. (Note which is the “upper side)
  3. Fully collapse the shock absorber, at the same time turning the dust cap or piston rod slowly to the left (counterclockwise), until it is felt that the cams of the adjustment nut engage in the recesses of the foot valve assembly.
  4. The damper may have already been adjusted. Therefore check whether the shock absorber is in the adjustment position or not by keeping it collapsed and gently turning it further to the left counting at the same time the half turns until a stop is felt. Stop turning then and do not use force.
  5. Keeping the shock absorber collapsed, make 1 half turn (180 degrees) to the right (clockwise, as you look down on the top of the shock absorber). In case of prior adjustment add the number of half the turns previously found. The total range varies with the part number but is usually about 5 half turns.
  6. Pull the shock absorber out vertically without turning for at least 1 cm to disengage the adjusting mechanism. The dust cap or piston rod may now be turned freely.
  7. After adjusting, fully extend the shock absorber, refit the bump stop around the shaft (ensuring correct side up.) then compress the shock absorber again which will push the bump stop back into position.

Rebound Adjustment Direction:
Clockwise: Firmer
Counter Clockwise: Softer

 


Adjustment Procedure 8010, 8041, 8210, 8241, 8610, 8641, 8710, 8741 Series

 

Externally Adjustable: These dampers can be adjusted, literally at the turn of a knob (or sweep window as in figure 1), a technique borrowed from Formula-1 racing where KONI dampers have dominated the field for years. By means of a knob damping forces can be altered to driving conditions or personal preferences. One can switch back and forth, in most cases in a matter of seconds, from a comfortable “touring” setting to a more firmer setting for a sporty drive.

Rebound Adjustment Direction:
Clockwise: Softer
Counter Clockwise: Firmer


Adjustment Procedure 8011, 8042, 8211, 8212, 8242, 8611,8711, 8742 Series

 

Adjustment Procedures

Independently adjustable in both compression and rebound this series racing shock absorbers offer over 140 different combinations and rebound, to finely tune the chassis for maximum performance.
See figures to the right and video below for instructions on how to adjust these dampers.

Rebound Adjustment Direction:

Clockwise: Softer
Counter Clockwise: Firmer

Compression Adjustment Direction:
Clockwise: Firmer
Counter Clockwise: Softer