Restore compression and reliability with the Japan-made PROX Piston Kit, designed as a precise OEM replacement. Cast from high-silicon aluminum alloy and CNC-machined to extremely close tolerances for consistent fit and performance.
Get your engine back to strong, consistent performance with the PROX Piston Kit—manufactured in Japan and designed as an OEM replacement. Built to meet or exceed OEM specifications, this kit helps restore compression, improve starting, and reduce power loss caused by piston and ring wear. If you’re planning a top-end refresh, this is a reliable all-in-one solution with the key components you need.
The piston is cast from a high-silicon-content aluminum alloy and then CNC-machined to extremely close tolerances, ensuring accurate fitment and dependable operation under demanding riding conditions.
