Yamaha YFM350 Raptor Piston Kit - Wiseco - Forged Series 11:1 CR - 1987-2013. A complete forged piston kit engineered for the Yamaha YFM350 platform, offering a factory-fit replacement with performance-minded construction for riders updating or rebuilding their engine.

This Wiseco Forged Series piston kit is designed for durability and consistent performance in ATVs and similar 4-stroke applications. The kit includes a forged piston optimized for strength, plus the wrist pin, rings, and circlips required for installation. At 84.00 mm bore and an 11.0:1 compression ratio, the piston balances reliability with a higher compression profile suitable for enthusiasts seeking improved responsiveness without changing basic engine architecture.

Features

• Forged construction for improved strength and service life
• Complete kit: piston, wrist pin, piston rings, and circlips included
• 84.00 mm bore size with 11.0:1 compression ratio (Wiseco specification)
• Designed to fit Yamaha YFM350 Warrior/Raptor model years 1987–2013

This piston kit is a practical choice for riders performing a rebuild or upgrading the rotating assembly with a forged part from a reputable manufacturer. If you have questions about fitment, installation, or which parts to pair with this kit, call us directly — we're happy to help. Visit us in Austin, Texas or the Los Angeles, California area for on-site installation and customization services. 512-982-9393 (TX) | 562-981-6800 (CA)

If you are considering purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov