Engine

Complete standard bore kitsComplete standard bore high compression kitsComplete Big Bore KitsIncludes cylinder, piston kit and gasketsTop end gasket kit does not include valve stem sealsMatched with vertex pistons to ensure longevity, performance and...

Bronco® offers OEM replacement valves for both ATV and UTV modelsOEM replacement valves are made of durable SUH35B heat resistant steel that also comes with fill Nitride finish for further durability and resistance to corrosionPerformance valves receive...

Feature Koyo and Nachi precision Japanese crank bearingsThe crankshaft seals feature a carbon/fluorocarbon pad on the seal lip and stainless steel garter springsReduces startup friction enhancing dry start performance and reducing crank pin wear

Kit includes replacement outer seal along with any O-rings, snap rings or lock washers required

Includes inner clutch cover gasket, water pump cover gasket and all bearings, seals and washers required to rebuild water pumpMechanical seal included!Meets or exceeds OEM quality

High Quality OEM type replacement valve setsSave $$$ over OEM pricesValve Stem Hard Coated for improved wearMade in JapanSet contains one intake valve and one exhaust valve

Complete rotating and reciprocating rebuild kit including crankshaft assembly, main bearings and seals, pistons and components, and a complete engine gasket kitAll components were developed through extensive research and development on ProX’s in-house...

All parts are made from the highest quality billet aluminumAll parts are polished to a mirror finish and have been fit tested to ensure a quality product

We choose to use C630 nickel bronze as a material to make valve guides because of its ideal characteristics for the application. The 5 percent nickel content provides superior resistance to wear, and the 80 percent copper content delivers outstanding...

These High Performance Cylinder studs are made from 180,000 psi yield strength, fine grain, heat treated, premium grade 8740 materialThreads are rolled after heat treating to insure maximum compressive stresses are retained, insuring maximum strength,...

These materials have proven heat and corrosion resistance properties. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Strict attention is paid to the surface preparation of the...

These materials have proven heat and corrosion resistance properties. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench. Strict attention is paid to the surface preparation of the...