Description

When you’re craving more grunt from your Ranger or RZR 570, this 625cc big-bore rebuild kit from REV6 is your ticket. Designed and assembled by our master engine technicians, it takes your stock motor up a notch, delivering stronger low-end torque and reliable top-end power. Moreover, every component is either upgraded or new, so you’re not just refreshing; you’re enhancing.

First, we start with an upgraded crankshaft built for higher RPMs and smoother oil flow. Then, we install a heavy-duty, moly-coated 625cc piston kit alongside a new big bore cylinder, boosting displacement without sacrificing reliability. Additionally, the main crankshaft bearings and a complete gasket set ensure your bottom end remains leak-free and durable. Furthermore, the timing chain and oil seal kit keep critical systems in check, while our forged intake and exhaust valves restore precise valve timing and seal.

This Kit Includes:

• Upgraded high-strength crankshaft

• HD 625cc big bore piston kit (moly-coated)

• New 625cc big bore cylinder

• Main crankshaft bearings

• Complete top-to-bottom gasket set

• Timing chain

• Oil seal kit

• (2) Forged intake valves

• (2) Forged exhaust valves

Ready to transform your ride?

• Contact Us for custom upgrades

• Warranty Policy for full coverage details

• FAQ for shipping and core return info

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Take action—order your big bore rebuild kit today and feel the difference on every trail.