Description

Extend the Life of Your Kawasaki Mule SX 4×4 LE

Your Kawasaki Mule SX 4×4 LE is built to handle daily tasks without complaint. Whether it’s moving equipment around your property or supporting work on the farm or jobsite, a worn engine can quickly slow productivity. Our Build Core rebuild service helps you keep the utility vehicle you already know and trust.

Once your rebuildable engine arrives, we inspect the major components, complete any necessary machine work, rebuild the engine to specification, and perform a final quality inspection before it ships back to you.

Engine Rebuild Overview

• Service: Build Core Engine Rebuild
• Fits: Kawasaki Mule SX 4×4 LE FJ400 (2016–2025)
• 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
• Typical Turnaround: Approximately 2 weeks after your engine core arrives, depending on its condition and parts availability

Restoration Checklist

• Complete inspection of the engine core
• 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

What to Expect

A rebuildable Kawasaki Mule SX 4×4 LE FJ400 engine core is required before work begins. After your engine reaches our shop, we’ll evaluate its condition, confirm the rebuild requirements, and move forward with the restoration.

Not sure if your engine qualifies? Contact REV6 before shipping your core. We’ll help you determine the next step.

Coverage That Travels With Your Engine

Your rebuilt engine is protected by our 1-Year No-Fault Warranty. If you’d like longer coverage, you can also choose the optional 2-Year No-Fault Warranty.

See complete coverage details on our Warranty Policy. Financing options are available through our Financing page.

Planning a DIY Repair?

If you’re rebuilding your own engine, explore our Kawasaki Mule parts and rebuild kits. You can also compare available kit options with our Engine Rebuild Kit Guide.

Start the Rebuild on Your Schedule

When you’re ready, place your order and send us your rebuildable engine core. We’ll keep you updated throughout the rebuild process and provide tracking information when your engine ships back.

We’re proud to support America’s military community. Ask about special pricing available to eligible veterans and active-duty servicemembers when you speak with our team.