Athena P4C0540118014A Top End Piston Kit with Gasket Kit for Yamaha 125 YZ 2005-2021 - 53.95 mm Cast 2-Stroke Piston Replacement Kit - Motocross Dirt Bikes Expander Kit Complete Kit Includes: 2-Piece T3

Complete Kit Includes: 2-Piece T3 High-Flow Exhaust Manifold (OEM replacement for 5135788AB

Memory-resistant so you can charge it from any power level

0-lb design allows for extended use with reduced fatigue

and top-tier engine protection

Whether you're attacking singletrack

Athena P4C0540118014A Top End Piston Kit with Gasket Kit for Yamaha 125 YZ 2005-2021 - 53.95 mm Cast 2-Stroke Piston Replacement Kit - Motocross Dirt Bikes Expander Kit Complete Kit Includes: 2-Piece T3Restore your Yamaha 125 YZ engine performance with the Athena P4C0540077020A Top End Piston Kit. Designed specifically for Yamaha 125 YZ models from 2005 2021, this complete rebuild solution includes a precision engineered 53. 95 mm cast piston and matching top end gasket kit for reliable sealing and long lasting durability. Athena develops and tests its piston technology and gasket components together to ensure optimal compatibility, improved