Yamaha YFZ450 Piston Kit - Wiseco - 12.41 CR - '04-'13. A forged replacement piston kit built for Yamaha YFZ450 models from 2004–2013 to restore compression and provide durable, application-specific performance for focused riders.

This Wiseco piston kit is engineered for 4-stroke powersports engines and manufactured to tight tolerances to match the YFZ450's requirements. The forged construction improves tensile strength and durability compared with many cast alternatives. Each kit is designed for the specific engine application, optimizing strength-to-weight where possible, and ships complete with high-quality piston rings, wrist pin and circlips for straightforward installation. The piston is engineered, forged, and machined in the USA (Mentor, OH) and specifies a 95.00 mm bore with a 12.41:1 compression ratio.

Features

• Fitment: Yamaha YFZ450 (2004–2013)
• Bore: 95.00 mm; Compression Ratio: 12.41:1
• Forged 4-stroke piston designed for specific engine application
• Includes piston rings, wrist pin, and circlips
• Engineered, forged, and machined in Mentor, OH, USA

If you have questions or need fitment advice, call us directly — we’re happy to help. We have two service locations offering installation and customization: Austin, Texas and the Los Angeles, California area. Call 512-982-9393 (TX) or 562-981-6800 (CA) for parts, scheduling, or technical questions. If you are considering purchasing multiple items, please contact us for shipping discounts. We provide on-premises installation at both locations.

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