Yamaha YFZ450R Piston Kit - Wiseco - 11.41 CR, 95.00 mm Bore - '09-'19. This Wiseco piston kit is a direct-fit replacement designed for the Yamaha YFZ450R ('09–'19) and built for 4-stroke powersports engines.

Wiseco forged 4-stroke pistons are engineered for specific engine applications and manufactured to tight tolerances. This kit is forged and machined in the USA (Mentor, OH) and features material and design choices that improve tensile strength and optimize the strength-to-weight ratio for long service life. The kit includes the piston, high-quality piston rings, wrist pin(s), and circlips for a complete top-end refresh at standard 95.00 mm bore with a compression ratio of 11.41:1.

Features

• Fitment: Yamaha YFZ450R ('09–'19)
• Bore: 95.00 mm (standard)
• Compression Ratio: 11.41 CR
• Forged construction, engineered for 4-stroke powersports engines
• Includes piston rings, wrist pin(s), and circlips
• Engineered, forged and machined in the USA (Mentor, OH)

If you have questions or want help confirming fitment for your build, call us directly — we can walk through details and installation options. We have two locations offering installation and customization services in Austin, Texas and the Los Angeles, California area. Call: 512-982-9393 (TX) or 562-981-6800 (CA).

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

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