Description

Yamaha Grizzly 450 Engine Rebuild – Core Required

This is a build core required listing. Your rebuilt engine work will begin only after we receive your Grizzly 450 engine core for inspection and repair. Once it arrives, we complete a full teardown, machining, and professional rebuild to restore dependable performance.

Our Core Exchange Process Is Simple

• Place Your Order: Secure your rebuild slot.
• Prep Your Core: Remove exhaust, electrical, and fueling components using our simple tear-down guidelines.
• Hassle-Free Pickup: Once packaged, we schedule FedEx pickup directly from your location.
• Expert Rebuild & Return: After passing strict quality control, your rebuilt engine ships directly back to you.

Once your engine arrives at our facility, the typical turnaround time is approximately two weeks. After it passes final inspection, we ship it back ready for installation.

Warranty Coverage

Every rebuilt Grizzly 450 engine includes a standard 1-year no-fault warranty. In addition, you may upgrade to a 2-year no-fault warranty for added protection.

For full coverage details, review our engine warranty page.

What Your Complete Engine Rebuild Includes

• Complete teardown, cleaning, and inspection of all components
• Crankshaft rebuilt, inspected, and verified within OEM specifications
• All bearings inspected and cleaned
• Cylinders inspected for wear and damage
• Worn cylinders bored to next oversize and hone finished or replaced
• New piston and piston rings
• Cylinder head cleaned, decked, rebuilt to manufacturer specifications
• Valve guides inspected and replaced as needed
• Valves and seats recut and verified with vacuum testing
• Camshaft lobes and journals cleaned and polished, replaced if required
• Timing chain inspected and replaced as needed
• Refurbished oil pump assembly
• Engine cases fully inspected and machined
• All gaskets and seals replaced
• Final assembly torqued to manufacturer specifications

Why Professional Remanufacturing Matters

First, accurate cylinder boring ensures proper ring seating. Next, crankshaft inspection protects bearing clearances. In addition, precision valve work restores compression and combustion efficiency. Because we follow strict rebuild standards, your Grizzly 450 engine returns ready for installation.

Shipping Instructions

Before sending your engine, review our core shipping instructions for packaging and freight details.

Need Assistance?

If you have questions about fitment or lead times, visit our help center or contact our team through our support page.

For break-in procedures and rebuild education, explore the REV6 blog.

Send in your core and rebuild your Yamaha Grizzly 450 the right way.