Description

Restore compression and performance with the REV6 Top End Rebuild Kit for Can-Am Outlander 850 (2016–2025). This kit provides all the necessary components to rebuild your engine’s top end — helping it run tighter, quieter, and stronger.

All gaskets and piston kits are built to precise factory tolerances and inspected before shipping. As a result, you’ll get reliable sealing, reduced blow-by, and longer engine life. We ship nationwide and include a 1-year warranty; you may also choose a 2-year no-fault upgrade. With years of experience in Powersports engine work, REV6 delivers parts you can trust.

Need tips on installation or torque values? Browse our REV6 Blog for rebuild guides or check the FAQ section for quick answers. You can also reach our team via the Contact page. Therefore, whether you’re doing a full overhaul or a service refresh, this kit gives you what you need to do it right.

This Kit Includes:

• (1) Top End Gasket Kit — OEM quality
• (2) Piston Kits — Replaces OEM#: 420686310

Take Action

Order your Top End Rebuild Kit today and bring your Outlander 850’s head back to peak condition. For coverage and support, see our warranty policy or explore our core return program.

Need assistance or alternative payment options? Check our financing page or visit the Help Center. Because your rebuild matters, we support you from order through installation.

Thank you for choosing REV6 — trusted by riders who expect precision, durability, and performance from their Powersports engines and parts. We proudly support veterans and servicemembers with exclusive discounts as our way of giving thanks.