Since 2013, the year Modena Engines' adventure in karting began with the approval of the KK1 engine, the Italian company has never hidden its particular attention to the development of Shifter engines for the FIA Karting KZ and KZ2 classes. Despite having various Direct-Drive engines in its range, in fact, it is quite evident how over the years Modena Engines has allocated more and more resources and time in the development of the KK project, reaching, in 2023, the approval of the third engine of the product line, i.e. the protagonist of this article: the KK3. We had the opportunity to visit the company's headquarters, about 100 km from Rome, to analyse and find out which innovations were developed with the KK3 and which, instead, were the components borrowed from its predecessor KK2 (approved in 2019, which we have covered in the article “Under Review - The new KZ Modena Engines KK2”). The protagonist of the renewal process to which this new engine has been subjected is the Modena Engines R&D team, composed of three engineers and three engine mechanics. These technicians made use, for the design, construction and development of the KK3, of CAD (Computer-Aided Design) software, advanced CNC machinery (capable of ensuring the most modern machining) and test benches, to refine the work and define the best technical direction for developing the engine.
The general appearance of the KK3 is well-finished both in terms of the quality of the materials and design. Abundant veining, wide thicknesses of the coupling parts (to ensure sealing) and with the positioning of the various organs (for example, the axis of the crankshaft and the sprocket) that is very different than that of the previous KK2.