Polaris ACE 900 Engine Rebuild (2017–2019)

Description

Engine Rebuild Service for the 2017–2019 Polaris ACE 900

Low compression, oil use, internal noise, and bearing wear can point to problems inside an ACE 900 engine. REV6 tears down the supplied engine, checks its internal condition, and performs the machining and parts replacement required by the core.

The rebuild includes new moly-coated pistons, high-Babbitt bearings, upgraded exhaust valve guides, and renewed sealing components. Meanwhile, reusable engine parts are measured and serviced before assembly.

Inside the Engine Rebuild

• Engine teardown, cleaning, and internal inspection
• Cylinder head cleaned, rebuilt, and set to the correct specifications
• Manganese bronze exhaust valve guides
• Valve sealing surfaces corrected and checked
• Camshaft components cleaned and inspected, then serviced as needed
• Crankshaft checked and verified within specification
• New high-Babbitt main and connecting-rod bearings
• Cylinders evaluated and reconditioned to restore the required surface finish
• New moly-coated pistons and piston rings
• Timing and oil-system components inspected and serviced as needed
• Engine cases inspected and machined where required
• New gaskets and seals
• Final assembly torqued to manufacturer specifications

The parts and machine work required depend on the measurements and condition of the engine core received by REV6.

Core Options

This rebuild requires an eligible Polaris ACE 900 engine core. You can send your engine to REV6 or select the $1,200 refundable core option shown on the product page.

The core charge is returned after REV6 receives, inspects, and accepts the required core under the applicable core terms. If you need an engine before sending yours, contact REV6 to confirm exchange availability.

After purchase, REV6 provides shipping instructions and tracking information. You will also have access to the customer service team if questions come up while preparing the core.

Fitment

• 2017 Polaris ACE 900
• 2018 Polaris ACE 900
• 2019 Polaris ACE 900

This listing is separate from the 2016 Polaris ACE 900 engine. Confirm the model year before placing your order.

Engine Inspection and Quality Control

One technician handles the engine assembly and verifies the required measurements. Then, another technician reviews the finished build before shipment. This second check helps confirm that the engine meets the required build specifications.

Estimated Turnaround

Most ACE 900 engines ship within an estimated 5–10 days after the required core arrives. However, core damage, added machine work, parts availability, and shop volume may affect the schedule.

If timing is important, contact the REV6 team for current availability before ordering.

Installation and Engine Break-In

Correct installation and break-in are required after the rebuilt engine is installed. Before the first ride, review the REV6 engine break-in procedure for startup, operating, and maintenance guidance.

Warranty, Financing, and Support

This Polaris ACE 900 engine rebuild includes a 1-year REV6 warranty. An optional 2-year no-fault warranty is also available. Review the policy for coverage, maintenance, break-in, and claim requirements.

Qualified customers can review REV6 financing options. You can also browse 2017–2019 Polaris ACE 900 engines, parts, and rebuild kits for related repair options.

Select your core and warranty options, then add the rebuild to your cart. If you need help before ordering, talk with the REV6 team.