Vertex Complete cast rib A Piston kitRef : 9412DA / 1095034001

The VERTEX cast piston reference 22584A is an alternative original part designed for motocross engines. Machined from aluminum, it features a polished finish and meets manufacturer specifications for standard replacement. Ideal for restoring a worn cylinder head or during an engine rebuild, this piston maintains a standard compression height to preserve the original behavior of your YZ250.

• Piston diameter: Ø 66.340 mm
• Recommended bore diameter: 66.40 mm
• Oversize letter: A
• Compression: Standard
• Material: Aluminum (cast piston)

Main compatibilities: YAMAHA YZ 250 — check the year and engine reference before installation. Listed in application lists for several YZ250 and some 250 motocross models (refer to manufacturer data or your vehicle sheet).

Before installation, check the condition of the sleeve, the clearance between the piston and cylinder, as well as the wear on the rings. Installation requires special attention to the positioning of the rings and the use of an appropriate break-in oil to ensure a proper initial break-in. For any uncertainty regarding compatibility, consult your mechanic or the technical documentation of your motorcycle.