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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- Price
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COMETIC Top End Gasket Kit - 97 mm - Yamaha C3813
COMETIC
$87.95A compromised top end gasket is one of the quickest ways to lose compression, power, and reliability. The COMETIC C3813 Top End Gasket Kit is engineered for high-output 4-stroke engines that demand...09347863- SKU:
- 09347863
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$87.95 -
COMETIC Top End Gasket Kit - KTM C3818
COMETIC
$47.95A quality top-end gasket kit is essential for maintaining cylinder pressure, preventing coolant leaks, and maximizing power output on high-performance 4-stroke engines. Cometic's EST (Extreme Sealing...09347864- SKU:
- 09347864
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$47.95Qty in Cart: 0Quantity:Price:$47.95Subtotal: -
COMETIC Top End Gasket Kit - 47 mm - Kawasaki/Suzuki C7682
COMETIC
$28.95A failing top-end gasket can compromise combustion chamber sealing, reduce ring seal efficiency, and lead to catastrophic engine failure. The COMETIC C7682 kit delivers OEM-spec sealing with...09347866- SKU:
- 09347866
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$28.95 -
COMETIC Top End Gasket Kit - 98 mm - Yamaha C3178-EST
COMETIC
$90.95A failed head gasket means catastrophic engine damage and downtime you can't afford. The COMETIC Top End Gasket Kit with EST (Extreme Sealing Technology) delivers the reliability and thermal...09347825- SKU:
- 09347825
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$90.95Qty in Cart: 0Quantity:Price:$90.95Subtotal: -
COMETIC Top End Gasket Kit - 99 mm - Yamaha C3279-EST
COMETIC
$90.95A failing top-end gasket will cost you power and reliability—and on high-output 4-stroke engines running boost or chasing peak naturally aspirated performance, factory gaskets often can't handle the...09347829- SKU:
- 09347829
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$90.95 -
VERTEX Top End Gasket Kit - Honda 810267
VERTEX
$86.55A leaking or degraded top end gasket compromises combustion seal integrity and invites coolant/oil contamination into your engine. The VERTEX 810267 gasket kit restores factory sealing specifications...09347999- SKU:
- 09347999
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$86.55 -
VERTEX Top End Gasket Kit - Husaberg/Husqvarna/KTM 810333
VERTEX
$48.37A quality top-end gasket kit is essential for maintaining proper compression and preventing oil seepage in high-performance engines. Whether you're rebuilding after a race season or performing...09348000- SKU:
- 09348000
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$48.37 -
VERTEX Top End Gasket Kit - Honda 810262
VERTEX
$78.72A top-end gasket kit is critical for maintaining compression integrity and preventing oil/coolant leaks that compromise engine reliability and performance. VERTEX gasket kits are engineered to OEM...09348001- SKU:
- 09348001
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$78.72 -
VERTEX Top End Gasket Kit - KTM 810328
VERTEX
$82.17A failing top-end gasket compromises compression, causes oil seepage, and forces an engine rebuild to fail prematurely. The VERTEX 810328 gasket kit eliminates guesswork by supplying OEM-equivalent...09348004- SKU:
- 09348004
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$82.17 -
VERTEX Top End Gasket Kit - Yamaha 810676
VERTEX
$70.38A top-end gasket kit is essential maintenance for any high-performance engine—it seals critical surfaces where combustion pressure and thermal cycling demand absolute reliability. The VERTEX 810676...09348005- SKU:
- 09348005
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$70.38 -
VERTEX Top End Gasket Kit - Yamaha 810677
VERTEX
$70.38A complete top-end gasket kit is essential when rebuilding or refreshing your Yamaha engine—sealing failures lead to compression loss, oil weeping, and costly downtime. The VERTEX 810677 kit...09348006- SKU:
- 09348006
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$70.38 -
VERTEX Top End Gasket Kit - Honda 8100000
VERTEX
$82.30A quality top-end gasket kit is essential for maintaining compression integrity and preventing coolant or oil seepage in high-performance engines. Whether you're rebuilding after a race season or...09348007- SKU:
- 09348007
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$82.30 -
VERTEX Top End Gasket Kit - Suzuki 810505
VERTEX
$22.38A compromised top-end gasket seal leads to oil weeping, combustion leakage, and accelerated wear on your Suzuki engine. The VERTEX 810505 Kit delivers OEM-equivalent sealing surfaces with precision...09348010- SKU:
- 09348010
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$22.38 -
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...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...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...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...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...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...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...09348029- SKU:
- 09348029
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$74.78
