
PROX Cast Piston - Manufacturer Ref: 01.2018.A
A robust and precise replacement for Cross engine displacements, this PROX cast piston is made from aluminum with a domed head to suit the specific cylinder head settings of 65 cm³ engines. Part of the PROX range, it adheres to the standard compression configuration and is available in oversize "A", with a diameter of Ø 43.45 mm, suitable for appropriately machined bores.
Designed for replacement mounting on compatible engines, it is particularly suitable for YAMAHA YZ 65 models (2024, 2025, 2026). Before installation, check the cylinder bore and the condition of the rings, pin, and clips: changing the rings and properly lubricating the skirt facilitates break-in and longevity. Choosing an oversize A piston requires appropriate adjustment of machining if necessary.