Description

Give Your Mule SX FI a Fresh Start

Whether your Mule SX FI spends its time maintaining property, hauling supplies, or handling everyday chores, a worn engine can slow everything down. Our Build Core rebuild service restores your original engine so you can keep the utility vehicle you’ve already invested in.

Once we receive your rebuildable engine core, we inspect it, machine components as needed, complete the rebuild, and verify everything before your engine ships back to you.

Quick Details

• Service: Build Core Engine Rebuild
• Fits: Kawasaki Mule SX FI 4×4 FJ400 (2019–2023)
• Core Required: Yes
• Warranty: 1-Year No-Fault Warranty Included
• Optional Coverage: 2-Year No-Fault Warranty Available
• Financing: Available
• Shipping: Nationwide with tracking information provided

What’s Included in the Rebuild

• Complete engine core inspection
• Crankshaft and connecting rod inspection
• Cylinder bore machined and honed as needed
• New piston and piston rings
• Complete gasket kit
• New oil seals and valve guide seals
• Cylinder head service with valves ground and valve lash adjusted
• Final quality inspection before shipment

Sending Your Core

Because this is a Build Core service, a rebuildable engine is required before work begins. After your engine arrives, our technicians evaluate its condition and complete the rebuild using the necessary machining and replacement components.

If you have questions before shipping your engine, Contact REV6. We’ll walk you through the process and answer any questions about your core.

Protection for Your Investment

Every rebuilt engine includes our 1-Year No-Fault Warranty. You also have the option to upgrade to a 2-Year No-Fault Warranty for additional peace of mind.

Read more on our Warranty Policy. Financing options are available on our Financing page.

Need Individual Engine Parts?

If you’re replacing components instead of rebuilding your engine, browse our Kawasaki Mule parts and rebuild kits. You can also compare rebuild options by reading our Engine Rebuild Kit Guide.

Ready to Get Started?

Order your rebuild whenever you’re ready, then send us your rebuildable engine core. We’ll take it from there and keep you updated throughout the process.

If you served in the U.S. military, be sure to ask about the discounts available to qualifying veterans and active-duty personnel.