
ATHENA Cast Piston Ø57.94 mm (Manufacturer part number: S4C05800001A) — Piston designed for motocross use, made of aluminum. Replacement part for 125 cc engines requiring an oversized piston.
Designed to withstand the stresses of trail riding and high engine RPMs encountered in off-road conditions, this ATHENA piston fits into maintenance or engine rebuild operations. Its finish enhances compatibility with the specified bore machined sleeves, and the designation "A" allows for quick identification of the oversize during installation.
Frequently compatible models (to be verified on your motorcycle specification): YAMAHA TT-R 125 LW BIG WHEELS E (CE21) 2021, YAMAHA YZ 125 (CE16) 2020, and YAMAHA YZ 125 (CE15) 2005. For a safe installation, be sure to check piston/sleeve clearance, rings, and timing during replacement.