ProX 01.1350.A Forged Piston Kit CRF250R + CRF250RX 13.9:1 78.97mm Standard Bore

The ProX 01.1350.A is a forged piston kit designed as a high-quality OEM replacement for the Honda CRF250R and CRF250RX. Featuring a standard bore diameter of 78.97mm (Size A) and a 13.9:1 compression ratio, this kit is engineered to restore your engine to factory performance specifications.

Key Features:

• Forged construction for superior strength and durability over cast alternatives
• Precision machined on state-of-the-art CNC equipment for exact tolerances
• Manufactured using a low-expansion, low-friction piston alloy — the same alloy used by major Japanese OEM engine manufacturers
• OEM-style tin skirt coating assists the break-in process and helps reduce friction after initial wear-in
• Designed specifically for Nikasil/plated cylinders; available in standard (A) as well as B and C oversizes for cylinders requiring re-plating
• Meets or exceeds OEM specifications for a seamless rebuild

Kit Includes:

• Forged piston (78.97mm / Size A)
• Piston rings
• Wrist pin
• Circlips

The ProX 01.1350.A piston kit provides a complete, ready-to-install solution for rebuilding the top end of your Honda CRF250R or CRF250RX. ProX Racing Parts is a trusted industry leader in cast and forged replacement pistons for off-road and motocross applications.