This Prox replacement engine rebuild kit is designed for the specific Polaris applications listed below. Complete rotating and reciprocating rebuild kit including crankshaft assembly, main bearings and seals, pistons and components, and a complete engine gasket kit.

Key Features

• Complete rotating and reciprocating rebuild kit including crankshaft assembly, main bearings and seals, pistons and components, and a complete engine gasket kit.
• All components were developed through extensive research and development on Pro-X in-house engine dyno.
• Crankshafts come completely assembled using Maxima® assembly lube and are inspected in-house for proper dimensions and trueness.
• Connecting rods feature proprietary design done in-house, and are forged, heat-treated and shot-peened for ultimate tensile strength and reduced stress risers.
• Connecting rods include graded bearings in the big end to ensure proper clearance, as well as a bronze bushing in the small end, both improving longevity and performance.
• Pistons are cast from OEM-grade alloy and feature MOS2 skirt coating and hard-anodized crown and ring grooves for improved performance and wear resistance through reduced friction and improved heat resistance.