Dirt Bike Engine Seals - Orings and Kits

A compromised crank seal is an invisible threat to engine reliability—leaking oil where it shouldn't, contaminating your combustion chamber, and accelerating wear on critical components. The PROX PRO-X Crank Seal Kit 42.3316 delivers OEM-quality seals in...

A worn or leaking crankshaft seal can undermine your engine's reliability and lead to costly oil loss and contamination. The PROX PRO-X Crank Seal Kit 42.3219 supplies all necessary seals for a complete crankshaft rebuild, restoring proper compression...

A worn or leaking crank seal compromises engine compression, increases oil consumption, and accelerates internal wear—all problems that compound quickly under racing conditions or high-mileage street use. The PROX PRO-X Crank Seal Kit 42.4300 provides...

A failing crank seal compromises engine compression, invites oil contamination, and accelerates wear on critical internal components. This complete kit delivers OEM-quality seals engineered to restore proper crankshaft sealing during a full rebuild,...

A failing crank seal will compromise your engine's integrity, leading to oil leakage, contamination, and potential catastrophic failure. The PROX PRO-X Crank Seal Kit 42.1103 delivers OEM-quality seals engineered to maintain proper compression and...

A compromised crank seal can lead to oil leakage, loss of compression, and catastrophic engine failure—especially under high-RPM conditions. The PROX PRO-X Crank Seal Kit 42.1206 provides OEM-quality seals engineered to maintain proper crankcase pressure...

A worn or failing crank seal compromises engine integrity, leading to oil leakage, contamination, and potential catastrophic failure. The PROX PRO-X Crank Seal Kit 42.1312 delivers OEM-quality seals engineered to restore proper crankshaft sealing and...

A worn crank seal compromises compression and invites oil leakage into your combustion chamber—exactly what your CR250 or CR500 doesn't need. This complete PROX Crank Seal Kit delivers OEM-equivalent seals for a full crank rebuild, restoring proper...

A compromised crank seal leads to oil leakage, contamination, and catastrophic engine failure—especially critical in high-revving 4-stroke applications like the CRF250R. This OEM-quality seal kit gives you everything needed for a complete crank rebuild,...

A compromised crankshaft seal leads to catastrophic oil loss and potential engine failure—neither acceptable for track or trail. The PROX Crank Seal Kit delivers OEM-quality seals engineered to contain pressure and eliminate leakage during high-RPM...

A worn crank seal compromises compression, invites fuel leakage, and accelerates internal engine wear—issues that compound quickly on high-revving two-strokes. The PROX Crank Seal Kit delivers OEM-equivalent seals in one complete package, eliminating...

A complete crank seal kit is essential for any bottom-end rebuild—worn seals compromise compression, invite contamination, and accelerate wear on freshly machined components. The PROX Crank Seal Kit for KTM 65 SX includes every seal necessary for a...

A compromised crank seal leads to oil leakage, contamination, and catastrophic engine failure—especially critical on high-revving two-strokes like the KTM85SX. This complete seal kit eliminates the guesswork of sourcing individual seals and ensures your...

A compromised crank seal can silently sabotage engine performance through oil leakage, contamination, and loss of critical lubrication. This complete seal kit eliminates guesswork during crank rebuilds by providing all necessary seals in one package,...

A compromised crank seal allows oil to escape and contaminants to enter—both catastrophic for engine longevity. The PROX Crank Seal Kit delivers OEM-spec seals for a complete, reliable crank rebuild without the guesswork of sourcing individual components...

A complete engine and transmission rebuild demands precision sealing—any leak compromises performance and longevity. This MOOSE OFFROAD Oil Seal Set eliminates guesswork by consolidating all essential gaskets and oil seals into one comprehensive kit,...

A leaking or worn carburetor mid-body gasket can cause fuel seepage, inconsistent jetting, and performance loss—problems that compromise both reliability and rideability. The MOOSE OFFROAD Carburetor Mid Body Gasket Kit supplies all necessary components...

Countershaft seal failure leads to oil leakage, contamination, and accelerated wear on critical drivetrain components. The MOOSE RACING SEAL KIT COUNTERSHAFT BET 25-4047 delivers OEM-quality sealing with engineered precision to keep your transmission...

A worn jet pump seal kit compromises your watercraft's performance and creates costly internal damage. The WINDEROSA 623116 Jet Pump Seal Kit restores proper sealing between the impeller and housing, ensuring consistent thrust and preventing water...

Engine seals are critical—they prevent oil leakage, maintain compression, and protect your investment in a rebuild. MOOSE RACING Motor Seals deliver OEM-equivalent performance at a fraction of dealership pricing, so you can confidently reassemble your...