
VERTEX Replica - Forged Piston (manufacturer part number 23391A) designed for replacement on Cross motorcycles. Machined aluminum piston for maintenance or restoration of your YZ250F, delivered in oversize A to fit a specific bore. Designed for off-road use, it retains the original dimensions while offering the robustness expected from a forged part.
Compatibility (examples): YAMAHA YZ 250 F CG27 (2009), CG33 (2012-2013). Before installation, check the bore, piston/ring clearance and follow the manufacturer's recommendations for break-in and installation. Replacement part suitable for mechanical preparation work and restoration of cross engines, to restore a cylinder-piston assembly to the correct dimensions.