
The TECNIUM cast piston reference 0503402 is a replacement part designed for urban 2T engines of 50 cm3. Designed with a flat top and a precise diameter of Ø 40.000 mm (40 mm), it adheres to standard dimensions for installation as a replacement on original engines. Its machining and finishing meet the requirements for adaptation to the small cylinder transmission systems typical of scooters and mopeds.
This piston is aimed at mechanics and riders looking for a replacement part for their urban 2-stroke engine: installation on the cylinder with original dimensions, checking the piston/ring clearance is recommended before installation. Compatible with many 50 cm3 variants; among the frequently affected models are the Yamaha AEROX R (SA421) 2018, the MBK Ovetto 2T One (2018), and the Beta Ark 50 AC Factory (2013). For reliable installation, check the clearances, the ring, and the circlip before reassembly.