PROX Piston Kit for Yamaha YFZ450 (2004-2009) and YFZ450R (2009-2011) - 12.0:1 Compression Ratio

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PROX pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as is used for all major Japanese engine manufacturers. PROX Piston Kits are a first class solution to replace the original piston in your Motorcycle, Scooter, Moped, ATV, Personal Watercraft, etc. PROX Piston Kits for sleeved cylinders are available in standard size and a wide range of oversizes. The availability of oversizes up to 2mm significantly helps to increase the lifespan of a cylinder by offering more re-boring possibilities. PROX pistons for plated cylinders come in standard size, as well as in A, B, C, D+ oversizes. Take advantage of the additional oversizes to extend the lifespan of plated cylinders. All PROX Piston Kits are supplied complete with Piston Rings, Wrist Pin and Circlips, ready to install!

The PROX Piston Kit Part Number 01.2435.A is designed specifically for Yamaha YFZ450 models from 2004 to 2009 and the YFZ450R from 2009 to 2011. This high-performance kit includes a precision-engineered piston assembly built to meet or exceed OEM standards, ensuring optimal engine performance and durability. Crafted with quality materials, the piston features a 12.0:1 compression ratio that enhances power output and responsiveness across a variety of riding conditions. Whether you're rebuilding your ATV or upgrading for better performance, this piston kit provides a reliable solution for maintaining engine integrity and extending its lifespan. Installation is straightforward with the included components, making it suitable for professional mechanics and experienced enthusiasts alike. Trust PROX for aftermarket parts that deliver consistent quality and performance for your Yamaha ATV.

Features:

• Designed for Yamaha YFZ450 (2004-2009) and YFZ450R (2009-2011) models

• Includes a piston assembly with high-quality manufacturing standards

• Compression ratio of 12.0:1 enhances engine power and efficiency

• Engineered for durability and long-lasting performance

• Suitable for rebuilding or performance upgrades