Description
Yamaha Grizzly 660 Engine
We guarantee your engine will be as good as new. We stand behind our engines with a 1-yr. warranty. Rev6 also offers a 2 year, no-fault, no-questions-asked warranty for an additional $450. This means that for two years, we will replace your engine free of charge, no questions asked, if anything happens! We got you covered!
What does your rebuild include?
- Standard No-Fault 1-year warranty with an optional 2-year No-Fault Warranty upgrade.
- We restore and reuse as many OEM parts as possible. We inspect and refurbish all OEM parts to guarantee high quality internals that keep your machine running reliably.
- All components are cleaned, dismantled, inspected and repaired as needed.
- Cylinder head inspected, cleaned, sandblasted, decked, rebuilt, rebuilt to manufacturer spec and undergoes a quality inspection.
- Valve guides inspected and replaced as needed.
- Valves and valve seats recut/refaced to ensure tight seal, verified with vacuum test.
- Camshafts lobes and journals cleaned and polished, replaced as needed.
- Crankshaft is rebuilt, inspected and verified within OEM specs.
- All bearings are inspected and cleaned.
- Cylinders are inspected for wear and damage. Worn cylinders are bored to the next oversize and hone finished or replaced.
- Piston replaced with a new piston and rings.
- Timing chain inspected for stretch and wear, replaced as needed.
- Refurbished oil pump assembly.
- Fully inspected and machined engine cases, tested for journal wear, cracks, holes, or excessive wear.
- All gaskets and seals replaced.
- Engine assembled and torqued to manufacturer specifications.
Our Commitment to Quality
At Rev6, we are committed to excellence in quality control. Every part, engine, and transmission goes through a rigorous quality assurance process. Experience the confidence that comes from our dedication to superior craftsmanship and reliability that Rev6 offers!
Rev6 build upwards of 400+ engines per month! Sometimes, we just don’t have cores in stock. Not a big deal! We will make this process as easy as possible for you.
Important: Your rebuilt engine work will only begin after we receive your core. We require the engine here to begin inspection and repair.
Our Core Exchange Process is Easy: This is a build core required listing, meaning we need your existing Grizzly 660 engine here for a complete rebuild. Here’s how simple it is to get your ride back:
- Place Your Order: Secure your rebuild slot.
- Prep Your Core: Follow our easy engine core tear-down instructions – just remove exhaust, electrical, or fueling parts.
- Hassle-Free Pickup: Once your engine core is packaged, we’ll send FedEx right to your door for pickup!
- Expert Rebuild & Return: After passing our strict quality control, your like-new Rev6 rebuilt engine will be shipped directly back to you.
Once your engine arrives here, the typical lead time is 2 weeks for your engine to be fully rebuilt and inspected. Once your engine passes our quality control inspection, we will ship your new Rev6 rebuilt engine back to you!













