Engine, Vortex VTJ, OKJ

"For the OKJ categories, the VTJ models make their debut, as the direct successors of the Vortex DTS and DTJ.
Among the various innovations introduced, an unprecedented production process stands out: the paired crankcase boring. This further processing stage of the engine crankcase makes it possible to achieve a higher final quality level of the product, with positive effects both in terms of quality and repeatability of the various models produced as well as in terms of performance. 


You can find the Homologation here"
Thanks to the constant work of Vortex's research and development department, in fact, the new engine from OTK Kart Group's Engine Division uses updated and optimised crankcase casting processes (cast and machined crankcases). In addition, the VTJ benefits, for the first time at Vortex, from an unprecedented manufacturing process: the paired crankcase boring.
This further processing phase of the engine crankcase allows a higher final quality level of the product to be achieved, with positive effects both in terms of quality and repeatability of the various models manufactured and in terms of the general improvement of the engine's performance and reliability.
The main featured inherited from the previous versions of both engines remain unchanged: lightness, assembly and use easiness, effective arrangement of mass and centre of gravity, compact dimensions and reliability.

• Water cooled with external pump
• Roller bearings
• Bore and stroke : 54 x 54 mm (Square) 
• Maximum engine speed : 14.000 Rpm
• Ignition system : Selettra CIK-FIA homologated
• Cylinder with fully machined cast iron liner 
• Number of cylinder / crankcase transfer : 5 / 3 
• Crankcase reed valve intake
• Fully machined intake section and transfers
• Conrod length : 102 mm (Center to center)