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 - 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...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...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...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...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...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...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...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...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,...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...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...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...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...09348009- SKU:
- 09348009
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$43.37 -
VERTEX Top End Gasket Kit - Husqvarna/KTM 810339
VERTEX
$99.37A failing top-end gasket can compromise combustion sealing and lead to costly engine damage—especially on high-performance Husqvarna and KTM builds. This complete gasket kit eliminates guesswork...09348012- SKU:
- 09348012
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$99.37 -
VERTEX Top End Gasket Kit - Kawasaki 810469
VERTEX
$80.70A failing top-end gasket seal can compromise cylinder pressure, increase oil consumption, and force you to rebuild sooner than necessary. The VERTEX 810469 kit delivers precision-engineered gaskets...09348013- SKU:
- 09348013
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$80.70 -
VERTEX Top End Gasket Kit - Gas Gas/Husqvarna/KTM 8100035
VERTEX
$74.70A failing top-end gasket kit compromises compression, invites coolant and oil leaks, and forces you to rebuild the engine sooner than necessary. The VERTEX 8100035 eliminates these risks with...09348018- SKU:
- 09348018
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$74.70 -
VERTEX Top End Gasket Kit - Husqvarna/KTM 810370
VERTEX
$71.87A top-end gasket kit is essential for maintaining cylinder head integrity and preventing compression leaks that compromise peak performance. Whether you're rebuilding after high-mileage wear or...09348020- SKU:
- 09348020
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$71.87 -
VERTEX Top End Gasket Kit - Honda 810237
VERTEX
$43.97A quality top-end gasket kit is essential for maintaining compression integrity and preventing oil seepage in high-performance applications. VERTEX gasket sets are engineered to OEM specifications...09348021- SKU:
- 09348021
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$43.97 -
VERTEX Top End Gasket Kit - Kawasaki 810481
VERTEX
$92.13A top-end gasket kit is essential maintenance for preserving cylinder head integrity and preventing compression loss, coolant seepage, and oil leakage. VERTEX's OEM-quality gasket set ensures proper...09348024- SKU:
- 09348024
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$92.13 -
VERTEX Top End Gasket Kit - Husqvarna/KTM 810330
VERTEX
$49.83A top-end gasket kit is essential maintenance for any high-performance Husqvarna or KTM engine—it seals critical combustion surfaces and prevents oil seepage that compromises reliability. VERTEX's...09348025- SKU:
- 09348025
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$49.83
