Description
The ProX .50 Oversize Piston Kit is designed as a direct OEM replacement for the Honda XR400R and TRX400EX. Manufactured with precision using state-of-the-art CNC equipment, it meets high-quality standards for durability and performance. The piston is made from a low-expansion, low-friction alloy used by major Japanese engine manufacturers. This kit includes a piston, piston rings, wrist pin, and circlips, providing a cost-effective alternative to OEM pistons. ProX piston kits for sleeved cylinders are available in standard and oversized options, while plated cylinder kits come in multiple size variations to help extend cylinder lifespan.
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