First and second generation of electronic suspension manufactured by WP and Showa for BMW and other bike manufactures .
Conventional shocks controlled by external linear actuators and electric motors normally found on BMW R1200GS, RT from 2006-2013 K models: K1200, K1300 ,K1600 some F models
Some models equipped with variable spring rate made of two parts physical spring and elastomer element seen on the ESA2 RT’s and K models
This configuration allows rider to control spring rate of the shock
Similar system is used on some models with current DESA active suspension like RT, RS, R, K1600GTL
Those high performance dampers can be serviced, tunned and setup like most of the aftermarket shocks for the fraction of the cost.
T-Tech suspension offers range of replacment parts and upgrades.
If servicing is not what you are looking for please consider TracTive Suspension range in the link below!
TracTive offers direct replacement for the factory ESA suspension system