The new engine of LKE Engines, presented in the 2019-2021 approval session, is called Black Rock, designed for gear class karts. This is the first project entirely managed by engineer Roland Holzner on his return to LKE

The name Black Rock reflects the new eye-catching colour, with black details contrasting with the fluo orange plastic clutch cover. The engine was the result of the analysis and development of the previous LKZ1 model carried out entirely by Roland Holzner, the engineer who in the past played an important role in the design of the engines of LKE Engines and who recently started working for the company again. "Before starting a new project - says Holzner - it is important to understand the strengths and weaknesses of the old approved engine: to analyse every aspect of the engine, to hear the drivers' opinions, to see it running on the track and on the test bench, as well as checking all the component drawings".
Based on this detailed analysis, homologue Holzner decided to intervene mainly on the gearbox, thermal unit and cylinder for the new approval. In particular, he introduced the new desmodromic gearbox, already developed by the engineer in other projects, which has made a reduction in the size of the engine possible. The desmodromic was a key point to rethinking the development of all the engine’s components: placed in the lower area of ​​the engine, it has better lubrication that favours the smoothness of the forks. These, in turn, were redesigned, increasing their mechanical strength.