Polaris RZR 900 98mm Big Bore Top End Kit (2017–2024)

Description

98mm Big Bore Top End Upgrade for the 2017–2024 Polaris RZR 900

Building a big bore top end for your Polaris RZR 900? This REV6 kit combines a 98mm big bore cylinder, matching forged piston kit, and complete top end gasket set for the 2017–2024 RZR 900.

REV6 master engine technicians design and assemble our rebuild kits with the components needed for the specified build. The 98mm cylinder and forged piston are the main components of this top end upgrade.

This Kit Includes

• 98mm big bore cylinder
• 98mm forged big bore piston kit
• Complete top end gasket set

98mm Big Bore Cylinder and Forged Piston

The 98mm big bore cylinder pairs with the supplied 98mm forged piston kit. Together, these components provide the foundation for the larger-bore top end configuration.

Before installation, check piston-to-cylinder clearance, piston ring end gaps, and other applicable assembly specifications. Proper measurements are important when installing forged pistons.

Complete Top End Gasket Set

The included complete top end gasket set supplies the sealing components for the specified top end assembly.

Inspect the cylinder head and mating surfaces before installation. Follow the applicable Polaris engine specifications when assembling the top end.

Polaris RZR 900 Big Bore Kit Fitment

This 98mm Big Bore Top End Kit is listed for:

• 2017 Polaris RZR 900
• 2018 Polaris RZR 900
• 2019 Polaris RZR 900
• 2020 Polaris RZR 900
• 2021 Polaris RZR 900
• 2022 Polaris RZR 900
• 2023 Polaris RZR 900
• 2024 Polaris RZR 900

Confirm your exact model and engine configuration before purchasing.

Questions About Fitment?

Not sure this 98mm big bore kit fits your RZR 900? Call REV6 at (801) 489-8697 or contact our team to confirm compatibility before purchasing.

More Polaris RZR Engine Rebuild Parts

Need additional engine components for your RZR 900 build? Browse the REV6 Polaris RZR parts catalog for available rebuild kits, crankshafts, bearings, and other engine parts.

For additional installation information, review the REV6 Piston and Ring Installation Guide and our guide on checking piston ring gap.

REV6 Parts Warranty

This Polaris RZR 900 Big Bore Top End Kit includes a 1-year REV6 parts warranty. Review the REV6 Warranty Policy for coverage details and requirements.

Choose the REV6 98mm Big Bore Top End Kit for your RZR 900 build, and contact our team if you need help confirming fitment.