Polaris Sportsman 850 Piston Set - Wiseco - 4-Stroke, 87.00 mm Bore - `09-`18. A direct-fit forged piston kit engineered for the Polaris Sportsman 850 (2009–2018) built to the manufacturer's application specifications.

Wiseco's forged 4-stroke pistons are manufactured to tight tolerances for specific engine applications. This kit is designed for stock compression ratio (CR) use in the 87.00 mm bore Sportsman 850 and includes the high-quality components needed for a dependable rebuild or performance-oriented refresh. The forged material provides improved tensile strength over many cast pistons, and the dedicated machining and tolerances help maintain consistency across assemblies. Components are engineered, forged, and machined in the USA (Mentor, OH).

Features

• Forged 4-stroke piston construction for improved tensile strength
• Specifically machined for Polaris Sportsman 850, 87.00 mm bore (2009–2018)
• Includes piston rings, wrist pin(s), and circlips for complete assembly
• Dedicated forgings that optimize strength-to-weight for the application
• Engineered and machined in the USA (Mentor, OH)

This Wiseco piston set is a practical choice for enthusiasts rebuilding or customizing a Sportsman 850 who want application-specific parts from a recognized powersports supplier. If you have questions about fitment, installation, or compatibility with your build, please call us directly at 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations in Austin, Texas and the Los Angeles, California area where we offer installation and customization services.

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

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