Dirt Bike Engine Gaskets and Kits
Dirt Bike Engine Gaskets & Top-End Kits for Yamaha, Honda XR650L & CRF at JJ Motorsports
Refresh your dirt bike's top end with premium engine gaskets and complete kits from JJ Motorsports, precision-manufactured for leak-free sealing, optimal compression, and reliable performance in motocross, enduro, and trail riding. Our selection includes full gasket sets, top-end rebuild kits, O-rings, and head/base gaskets designed for perfect fitment, heat resistance, and easy installation without machining. Compatible with popular models like Yamaha YZ/WR, Honda XR650L, CRF, and more, these high-quality components from trusted brands ensure smoother operation, reduced oil consumption, and extended engine life under dusty, high-RPM conditions. From Moose Racing's comprehensive off-road sets to ProX and Athena's OEM-spec top-end kits, get everything needed for a professional rebuild—head gaskets, valve seals, base gaskets, and more—to restore power and prevent blow-by on every ride.
Shop brands like Moose Racing, ProX, and Athena for race-proven quality. Explore related categories such as dirt bike piston and ring kits for full rebuilds or dirt bike engine for cylinders and valves.
Top Dirt Bike Engine Gaskets & Kits
- Moose Offroad Complete Gasket Set Yamaha 8080037MSE – Full engine gasket kit for Yamaha models; includes all necessary seals, O-rings, and gaskets for complete top-to-bottom rebuild with OEM reliability.
- ProX Top End Gasket Set Honda XR650L 35.1623 – Precision top-end kit for Honda XR650L; features head, base, and valve stem seals for leak-free compression and easy installation.
- Athena Top End Gasket Kit Honda P400210600323 – High-performance top-end rebuild kit for Honda CRF models; includes multi-layer steel head gasket, O-rings, and seals for maximum sealing under extreme conditions.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
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VERTEX Top End Gasket Kit - Husaberg/Husqvarna/KTM 810335
VERTEX
$41.03A failing top-end gasket doesn't just leak—it compromises combustion efficiency, wastes fuel, and can lead to catastrophic engine damage if left unchecked. The VERTEX 810335 gasket kit gives you OEM-equivalent sealing with precision-engineered components...09348011- SKU:
- 09348011
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$41.03 -
VERTEX Top End Gasket Kit - Honda 810241
VERTEX
$52.63A leaking top-end gasket will compromise your engine's reliability and performance, whether you're on the track or the street. The VERTEX 810241 kit delivers OEM-quality sealing across all critical surfaces, eliminating guesswork during your rebuild...09348015- SKU:
- 09348015
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$52.63 -
VERTEX Top End Gasket Kit - Yamaha 810690
VERTEX
$55.05A top-end rebuild demands precision sealing to prevent compression leaks and oil weeping that compromise performance and reliability. The VERTEX 810690 gasket kit delivers factory-engineered fitment for Yamaha engines, eliminating guesswork and ensuring...09348017- SKU:
- 09348017
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$55.05 -
VERTEX Top End Gasket Kit - Yamaha 810614
VERTEX
$24.92Top-end gasket failure compromises engine sealing and can lead to coolant/oil leakage, performance loss, and costly damage if left unaddressed. The VERTEX 810614 gasket kit provides OEM-equivalent sealing for Yamaha engines with precision-engineered...09348022- SKU:
- 09348022
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
$24.92 -
VERTEX Top End Gasket Kit - Yamaha 8100025
VERTEX
$80.70A failed top end gasket can compromise your entire engine's integrity—allowing coolant leaks, oil seepage, and combustion blow-by that quickly escalate into catastrophic failure. The VERTEX 8100025 gasket kit eliminates guesswork with a complete,...09348023- SKU:
- 09348023
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$80.70 -
VERTEX Top End Gasket Kit - KTM 810309
VERTEX
$32.83A failing top-end gasket will compromise combustion chamber sealing, leading to compression loss, oil weeping, and accelerated engine wear. The VERTEX 810309 Kit delivers OEM-quality gasket materials engineered to maintain a reliable seal under high...09348028- SKU:
- 09348028
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$32.83 -
VERTEX Top End Gasket Kit - Gas Gas/Husqvarna/KTM 810374
VERTEX
$74.78A quality top end gasket kit is essential for maintaining cylinder head integrity and preventing compression loss, oil leakage, and coolant seepage. Whether you're rebuilding after high-mileage wear or performing preventive maintenance, the VERTEX Top...09348029- SKU:
- 09348029
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$74.78 -
VERTEX Top End Gasket Kit - Husqvarna/KTM 810340
VERTEX
$26.38A quality top-end gasket kit is non-negotiable for engine reliability—whether you're rebuilding after high-mileage wear or preparing for competition. The VERTEX Top End Gasket Kit delivers OEM-equivalent sealing performance across all critical cylinder...09348035- SKU:
- 09348035
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$26.38 -
VERTEX Top End Gasket Kit - Husaberg/Husqvarna/KTM 810342
VERTEX
$71.87A failed top-end gasket compromises compression, invites oil seepage, and degrades engine performance—especially under the sustained heat and vibration of aggressive riding. The VERTEX Top End Gasket Kit delivers OEM-quality sealing with precise fitment...09348036- SKU:
- 09348036
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$71.87 -
VERTEX Top End Gasket Kit - Honda 810221
VERTEX
$25.42A quality top-end gasket kit is essential for maintaining proper combustion chamber sealing and preventing oil leaks that compromise engine performance and reliability. The VERTEX 810221 delivers OEM-equivalent sealing with materials engineered to handle...09347988- SKU:
- 09347988
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$25.42 -
VERTEX Top End Gasket Kit - Kawasaki/Suzuki 810411
VERTEX
$38.13A quality top-end gasket kit is non-negotiable for maintaining compression and preventing oil seepage in high-performance applications. The VERTEX 810411 ensures reliable sealing across critical engine surfaces, whether you're rebuilding after a race or...09347989- SKU:
- 09347989
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
$38.13 -
VERTEX Top End Gasket Kit - Kawasaki/Suzuki 810463
VERTEX
$69.13A worn or damaged top end gasket compromises cylinder head sealing, leading to oil weeping, coolant leaks, and potential compression loss—all of which degrade engine performance and reliability. The VERTEX 810463 gasket kit provides OEM-equivalent...09347990- SKU:
- 09347990
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$69.13 -
VERTEX Top End Gasket Kit - Yamaha 810616
VERTEX
$43.97A failed top-end gasket can compromise your engine's seal integrity and lead to costly leaks or performance loss. The VERTEX 810616 kit eliminates guesswork by providing OEM-equivalent gaskets engineered to Yamaha specifications, allowing you to complete...09347991- SKU:
- 09347991
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$43.97 -
VERTEX Top End Gasket Kit - Yamaha 810642
VERTEX
$55.28A proper top end gasket kit is critical for maintaining cylinder head sealing integrity and preventing oil and coolant leaks that compromise engine performance and reliability. The VERTEX 810642 provides OEM-equivalent construction with precision-cut...09347992- SKU:
- 09347992
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$55.28 -
VERTEX Top End Gasket Kit - Kawasaki/Suzuki 810412
VERTEX
$27.87A top-end gasket kit is essential maintenance for any Kawasaki or Suzuki engine that's seen significant use or been rebuilt. Worn or compromised gaskets lead to compression loss, oil seepage, and reduced reliability—problems that compound quickly if left...09347996- SKU:
- 09347996
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$27.87 -
VERTEX Top End Gasket Kit - Kawasaki 810457
VERTEX
$46.95A leaking top-end gasket kit compromises engine performance and accelerates wear on critical components. This VERTEX kit provides OEM-equivalent sealing with precision-engineered tolerances, eliminating compression loss and protecting your engine during...09347998- SKU:
- 09347998
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$46.95 -
VERTEX Top End Gasket Kit - Yamaha 8100008
VERTEX
$25.42A top-end gasket kit is essential for maintaining proper combustion chamber sealing and preventing costly oil leaks that compromise engine performance. Whether you're rebuilding after high-mileage wear or prepping for race season, the VERTEX 8100008 kit...09348002- SKU:
- 09348002
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$25.42 -
VERTEX Top End Gasket Kit - Yamaha 810641
VERTEX
$28.75A top-end gasket kit is essential for maintaining proper compression and preventing oil seepage in your engine's cylinder head assembly. Whether you're rebuilding after high-mileage wear or preparing for increased boost pressure, VERTEX gaskets provide...09348003- SKU:
- 09348003
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$28.75 -
VERTEX Top End Gasket Kit - KTM 810302
VERTEX
$32.22A quality top-end gasket kit is essential for maintaining compression integrity and preventing oil seepage in high-revving engines. The VERTEX Top End Gasket Kit delivers OEM-equivalent sealing performance with materials engineered to withstand repeated...09348008- SKU:
- 09348008
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$32.22 -
VERTEX Top End Gasket Kit - Honda 810263
VERTEX
$43.37A failing top-end gasket seal compromises compression, causes oil weeping, and tanks engine reliability—especially under high heat and boost conditions. The VERTEX 810263 kit delivers OEM-equivalent sealing surfaces with material composition engineered...09348009- SKU:
- 09348009
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$43.37
