Description

625cc Big Bore Rebuild Kit for Polaris 570 (2018–2021 Models)

If you’re rebuilding your Polaris 570 and want more displacement and stronger internal components, this 625cc big-bore rebuild kit delivers both performance and reliability. By increasing displacement and upgrading critical wear components, this kit is designed for riders who want more power without sacrificing durability.

This rebuild package includes upgraded rotating assembly components along with reinforced valvetrain parts, making it ideal for performance-oriented builds as well as complete engine overhauls.

What’s Included in This 625cc Big Bore Kit

• Upgraded crankshaft
• Upgraded moly-coated piston
• New 625cc big bore cylinder
• Timing chain
• Upgraded timing tensioner
• SKF bearings
• Complete gasket kit
• Valve stem seals
• Oil seal set
• (2) Forged intake valves
• (2) Forged exhaust valves

Why Upgrade to 625cc?

Increasing displacement allows the engine to move more air and fuel, which can translate into stronger low-end torque and improved throttle response. Additionally, upgraded crankshaft and forged valve components provide added strength compared to stock parts.

This kit is assembled with components selected by experienced engine technicians and is backed by our 1-year parts warranty.

Performance Support

For riders looking to maximize performance from a big-bore setup, proper tuning and airflow upgrades are important. If you are considering calibration adjustments, review our Polaris ECU/ECM Premium Tune Service to help optimize your setup.

Installation Notes

Proper bore clearance verification, ring end-gap measurement, and torque procedures are critical during installation. Always follow manufacturer specifications and recommended break-in procedures.

Order with Confidence

Upgrade your Polaris 570 to 625cc while rebuilding it the right way. If you have questions, contact our team.