





ATHENA Cast Piston designed for oversized cylinders for enduro and motocross. This aluminum piston meets the needs for engine repair or rebuild when the bore requires an oversize of +0.01 mm (letter B). An original ATHENA part designed for standard compression fitting, it integrates into standard engine revisions without modifying the original piston/ring system.
This cast piston is aimed at mechanics and riders performing a cylinder/piston overhaul, in conjunction with a re-bore to +0.01. It adheres to the specified dimensions to ensure proper fit in the ring plane and the cylinder/piston clearance recommended by the manufacturer. To be installed with compatible components (rings, pin, clips) and check radial and axial clearance during break-in.
Main Compatibilities:
Manufacturer Reference: S4C05400016B