2008-10 Polaris RZR/Ranger 800 Engine Rebuild Kit 80.01mm | ProX Clearance

Bring the major rotating and reciprocating service components together for your listed Polaris 800 engine. This ProX rebuild kit includes a preassembled crankshaft, bearings and seals, pistons and related components, plus a complete engine gasket kit.

80.01 mm bore, +0.01 mm size, 10.0:1 compression and 760 cc specification. Fits only the exact 2008–2010 UTV rows shown; Ranger 800 applications in this table are 2010 only. Measure the engine and confirm piston/bore clearance before selecting this size. This is a rebuild kit, not an assembled engine.

2008-10 Polaris RZR/Ranger 800 Rebuild Kit 80.01mm Features

• Complete rotating/reciprocating rebuild parts kit.
• Preassembled and dimensionally inspected crankshaft.
• Forged, heat-treated and shot-peened connecting rods.
• Cast aluminum-alloy pistons with MOS2 skirt coating.
• Hard-anodized piston crown and ring grooves.
• 80.01 mm bore / +0.01 mm piston size; 10.0:1 compression.

Fitment and Compatibility

80.01 mm bore, +0.01 mm size, 10.0:1 compression and 760 cc specification. Fits only the exact 2008–2010 UTV rows shown; Ranger 800 applications in this table are 2010 only. Measure the engine and confirm piston/bore clearance before selecting this size. This is a rebuild kit, not an assembled engine.

What’s Included

Crankshaft assembly, main bearings and seals, pistons and related components, and a complete engine gasket kit. Engine cases, cylinders and an assembled engine are not included.

Manufacturer part number: 10.EK5806.B. Parts Unlimited number: 0903-1688.

Installation Notes

Professional engine measurement and assembly are recommended. Inspect cases, cylinders and mating components, verify the 80.01 mm size against the service specifications, and follow the service manual for clearances, torque, timing and break-in.

Clearance Stock, Shipping, Warranty and Returns

Limited discontinued distributor stock may ship directly from a supplier warehouse. Availability can change before fulfillment. Review our shipping policy and return policy before ordering. Contact RAD UTV Parts to confirm closeout return eligibility and current manufacturer warranty terms.

Frequently Asked Questions

Is this a complete replacement engine?

No. It is a kit of rebuild components and gaskets. It does not include assembled engine cases or cylinders.

What piston size is supplied?

This is the 80.01 mm / +0.01 mm version, part 10.EK5806.B. Confirm bore condition and the required clearances before ordering.

What is included?

Crankshaft assembly, main bearings and seals, pistons and related components, and a complete engine gasket kit. Engine cases, cylinders and an assembled engine are not included.

Why is this item on clearance?

This is discontinued distributor stock offered at a reduced price. Quantities are limited; confirm the application and required companion parts before ordering.

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