Description

Restore Your Kawasaki Mule SX 4×4 FE FJ400 Engine

Your Kawasaki Mule SX works hard in tight spaces where reliability matters. When the engine begins showing signs of wear, rebuilding your original engine can help extend the life of your utility vehicle while maintaining the fit and compatibility you already have.

Our Build Core service starts with your rebuildable engine. Once it arrives, our technicians inspect every major component, complete the required machining, assemble the engine, and perform a final quality inspection before returning it to you.

Engine Details

• Service: Build Core Engine Rebuild
• Fits: Kawasaki Mule SX 4×4 FE FJ400 (2023–2025)
• 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

Rebuild Service Includes

• 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

Before You Ship Your Engine

A rebuildable engine core is required for this service. If you’re not sure whether your engine qualifies, reach out before shipping it. We’ll answer your questions and help you understand what to expect during the rebuild process.

Need assistance? Contact REV6 and our team will be glad to help.

Your Warranty Options

Every rebuilt engine includes a 1-Year No-Fault Warranty. If you’d like additional coverage, you can also select our optional 2-Year No-Fault Warranty.

Review complete coverage on our Warranty Policy. Flexible payment options are available on our Financing page.

Repairing Instead of Rebuilding?

Browse our Kawasaki Mule engine parts and rebuild kits if you’re replacing individual components. You can also learn about different rebuild options in our Engine Rebuild Kit Guide.

Let’s Get Your Mule Back on the Job

When you’re ready, send us your rebuildable engine core and we’ll handle the rebuild from inspection through final assembly.

Military discounts are available for eligible veterans and active-duty service members. Ask our team for details when placing your order.