





ATHENA Racing Forged Piston — manufacturer reference S4F07700021B. Specifically designed for Cross displacements, this forged aluminum ATHENA piston is suitable for +0.01 mm overbores (oversize letter B). Engineered for the demanding uses of off-road, it adheres to the standard compression profile for compliant installation within manufacturer tolerances.
This ATHENA Racing piston is aimed at the preparation and repair of Cross engines where the robustness of moving parts is essential. Its forged construction provides a structure suited to the thermal and mechanical stresses encountered in off-road conditions. The +0.01 oversize allows for precise boring for a correct fit in the cylinder.
Main compatibilities: SUZUKI RM-Z 250 (2016, 2017, 2018) — check the diameter and oversize letter before installation. To ensure durable operation, follow the installation recommendations (clearances, torque specifications) and replace the ring with the indicated reference if necessary.