Athena S4C05800001B Cast Piston for Yamaha 125 YZ (1997-2025) - Piston Size 57.95 mm Forged 2-Stroke Piston Replacement - Motocross Dirt Bikes snapback This genuine Topcon tripod replaces

This genuine Topcon tripod replaces older models like the TP-210T and delivers professional-grade durability at an affordable price

leak-free fit in the airbox

and dual-sport enthusiasts who need reliable performance in mud

engineered for precise OEM‑fit protection on KX250F and KX450F models from 2009 onward

Athena S4C05800001B Cast Piston for Yamaha 125 YZ (1997-2025) - Piston Size 57.95 mm Forged 2-Stroke Piston Replacement - Motocross Dirt Bikes snapback This genuine Topcon tripod replacesIf you're looking to unleash more low end torque, stronger mid range power, and overall improved performance from your Yamaha YZ125, the Athena S4C05800001B is the perfect choice. Engineered in Italy by one of the world's leading powersports manufacturers, this high quality cast piston kit is specifically designed to pair with Athena's Big Bore Cylinder Kits, reliably increasing your bike's displacement from 125cc. Whether you're a weekend trail