my adjustable koni's (in 71 911T strut) are the older kind...the newer ones have knobs...to adjust mine you have to rotate the strut clockwise/counterclockwise and listen for clicks...pain in the ass
Click to view attachment Fully compress the shock absorber, at the same time turning the dust cap or piston rod slowly to the left (anti-clockwise), until it is felt that the cams of the adjusting nut engage in the recesses of the foot valve assembly (fig. 1).
NOTE: Some shock absorbers include a bump rubber concealed under the dust cover and this must be removed prior to adjusting. Don’t forget to re-install.
Keeping the shock absorber compressed make 1 full turn (360°) to the right (clockwise). The total range is about 5 half turns (fig. 2).
Extend the shock absorber vertically for at least 1 cm without turning in order to disengage the adjusting mechanism. The dust cap or piston rod may now be turned freely.
WARNING: Adjust both left and right dampers identically. Failure to do so may lead to unstable handling and uneven tyre tread wear.