





ATHENA Cast Piston - Manufacturer Ref. S4C05400016A
Designed for the restoration of 125cc motocross engines, this ATHENA cast piston is aimed at riders and tuners looking for a reliable replacement part that meets OEM specifications. Made from aluminum, it features a diameter of Ø 53.940 mm (designated Ø 53.94 mm) and a compression in standard configuration. Its oversize letter is indicated as A with an oversize listed as STD.
Ideal for maintenance operations on 125 cc engines, this piston is compatible with several Yamaha models listed among common applications: YAMAHA TT‑R 125 LW BIG WHEELS E (CE21) 2021, YAMAHA YZ 125 (CE16) 2020, and YAMAHA YZ 125 (CE15) 2005. To ensure a secure installation, check the condition of the cylinder, rings, and bore tolerances before installation.