Description

Restore the Top End of Your Polaris Ranger XP 1000 NorthStar Engine

If your engine has low compression, cylinder damage, worn pistons, or burnt valves, this master top end rebuild kit replaces the major wear components while allowing you to reuse a serviceable bottom end. It’s an excellent choice when the lower end remains within specification but the top end needs a complete refresh.

REV6 upgraded pistons feature a rolled-on Teflon skirt coating that helps reduce friction during cold starts, a hard-anodized crown for improved heat management, machined piston tops to help reduce carbon buildup, and carbon-coated piston rings for added wear resistance. Replacing these components during one teardown helps avoid unnecessary labor later and gives your rebuild a solid foundation.

What This Kit Includes

• New Cylinder
• Top End Gasket Set
• (2) Moly Upgraded Pistons
• (4) Intake Valves
• (4) Exhaust Valves

When Is This the Right Kit?

This kit is a good choice when the cylinder is damaged, compression has dropped, valves no longer seal properly, or the pistons have reached the end of their service life. Replacing these parts together helps ensure the new components wear evenly after assembly.

REV6 Tip: Before installing the new top end, inspect the cam chain, guides, and tensioner. Replacing worn timing components while the engine is apart is far easier than reopening the engine later.

Continue Your Polaris Ranger XP 1000 NorthStar Rebuild

Need to rebuild the entire engine? Compare the Polaris Ranger XP 1000 NorthStar Master Engine Rebuild. 

Rebuilding the lower end as well? View the Polaris Ranger XP 1000 NorthStar Complete Bottom End Rebuild Kit.

Looking for additional engine components? Browse the Polaris Ranger XP 1000 NorthStar Parts Catalog.

Support for Every Stage of Your Rebuild

Our 1-year no-fault warranty backs every REV6 rebuild kit. For larger rebuilds, explore our financing options. Need help selecting the correct parts? Contact REV6 by phone or text, or visit the REV6 Blog for additional engine rebuilding tips and technical resources. You can also shop by make and model to explore more engines, rebuild kits, and replacement parts.