Polaris 90 Outlaw Piston Sets - Wiseco - 10.51 CR, 48.50 mm Bore - `07-`14. A forged Wiseco piston kit engineered for the Polaris 90 Outlaw/Sportsman models (2007–2014) that provides a complete replacement package for rebuilding or upgrading your small-displacement four-stroke engine.

These pistons are part of Wiseco’s Forged Series for 4-stroke applications, designed to offer strong, consistent performance and long service life under typical riding conditions. Each kit includes the piston, wrist pin, rings, and circlips to simplify installation. The forged construction improves resistance to wear and stress compared with cast alternatives, and the specification (48.50 mm bore, 10.51:1 compression ratio) matches the fitment requirements for the listed Polaris models.

Features

• Forged 4-stroke piston construction for enhanced durability
• Complete kit: piston, wrist pin, rings, and circlips included
• 48.50 mm bore with 10.51:1 compression ratio (CR) — fits Polaris 90 Outlaw/Sportsman `07–`14
• Designed for a range of small four-stroke applications (ATVs, UTVs, dirt/street bikes where applicable)

This piston set is intended for enthusiasts performing maintenance, repairs, or modest performance builds who need a reliable, OEM-compatible forged replacement. It provides the parts necessary to complete a top-end service while maintaining the correct bore and compression specifications for the stated model years.

If you have questions or want help confirming fitment, call us directly at 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations — Austin, Texas and the Los Angeles, California area — where we offer installation and customization services.

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

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