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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VINTCO Engine Gasket Kit - Suzuki KEG079
VINTCO
$54.95Engine gasket failure compromises compression, invites oil seepage, and can force an unplanned teardown—especially critical when you're pushing your Suzuki to the limit. The VINTCO Engine Gasket Kit KEG079 delivers complete lower-engine gasket coverage...09347342- SKU:
- 09347342
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$54.95 -
VINTCO Engine Gasket Kit - Yamaha KEG030
VINTCO
$29.95Engine gasket degradation compromises compression, invites oil seepage, and accelerates wear on critical internal components. The VINTCO Engine Gasket Kit KEG030 delivers a complete lower-engine gasket set engineered to OEM or superior specifications,...09347343- SKU:
- 09347343
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$29.95 -
VINTCO Engine Gasket Kit - Yamaha KEG031
VINTCO
$32.95A failed gasket means oil seeps, compression drops, and your engine rebuild stalls before it starts. The VINTCO Engine Gasket Kit KEG031 provides a complete set of precision-cut gaskets designed to OEM specifications, ensuring reliable sealing across...09347344- SKU:
- 09347344
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$32.95 -
VINTCO Engine Gasket Kit - Yamaha KEG037
VINTCO
$34.95A failing gasket seal compromises your entire lower engine assembly, leading to fluid leaks, overheating, and catastrophic engine damage. The VINTCO KEG037 Engine Gasket Kit delivers OEM-spec sealing with modern material compounds engineered to withstand...09347345- SKU:
- 09347345
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
$34.95 -
VINTCO Engine Gasket Kit - Yamaha KEG039
VINTCO
$36.95A compromised engine gasket can turn a reliable build into a liability, allowing oil seepage and coolant loss that compound into catastrophic failures. The VINTCO Engine Gasket Kit KEG039 delivers OEM-equivalent sealing integrity using modern material...09347346- SKU:
- 09347346
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
$36.95 -
VINTCO Engine Gasket Kit - Yamaha KEG044
VINTCO
$36.95A failed gasket can compromise your engine's integrity and lead to costly downtime. The VINTCO Engine Gasket Kit KEG044 delivers complete lower-engine sealing with materials engineered to match or exceed OEM specifications, ensuring reliable performance...09347347- SKU:
- 09347347
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$36.95 -
VINTCO Engine Gasket Kit - Yamaha KEG045
VINTCO
$34.95Engine gaskets degrade over time, leading to oil leaks, coolant seepage, and compromised combustion sealing—all of which rob your Yamaha of performance and reliability. The VINTCO KEG045 gasket kit replaces the entire lower engine assembly with...09347348- SKU:
- 09347348
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$34.95 -
VINTCO Oil Seal Kit - Honda KOS005
VINTCO
$52.95A complete engine rebuild demands precision in every component, and sealing integrity is non-negotiable for oil retention and performance longevity. The VINTCO Oil Seal Kit ensures your Honda's lower end is properly sealed against leaks and...09347349- SKU:
- 09347349
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$52.95 -
VINTCO Oil Seal Kit - Honda KOS001
VINTCO
$36.95A complete engine rebuild demands meticulous attention to every seal and gasket—and this VINTCO Oil Seal Kit eliminates guesswork by including all the lower-end seals you need to prevent leaks and maintain pressure integrity. Whether you're refreshing a...09347350- SKU:
- 09347350
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
$36.95 -
VINTCO Oil Seal Kit - Honda KOS006
VINTCO
$45.95A complete engine rebuild demands precision at every sealing point—and this oil seal kit eliminates the guesswork by bundling all the critical lower-end seals your Honda engine requires. Factory seals degrade over time, leading to oil weeping,...09347351- SKU:
- 09347351
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
$45.95 -
VINTCO Oil Seal Kit - Kawasaki KOS016
VINTCO
$42.95A complete engine rebuild demands precision in every component—and oil seals are non-negotiable for preventing leaks and maintaining proper lubrication throughout your lower end. This VINTCO kit eliminates the guesswork by bundling all the critical seals...09347352- SKU:
- 09347352
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
$42.95 -
VINTCO Oil Seal Kit - Kawasaki KOS012
VINTCO
$42.95A complete engine rebuild demands precision sealing—any leak in your crankshaft, kickstarter, or clutch release shaft can compromise performance and reliability. The VINTCO Oil Seal Kit KOS012 supplies all the OEM-specification seals and o-rings you need...09347353- SKU:
- 09347353
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$42.95 -
VINTCO Oil Seal Kit - Honda KOS002
VINTCO
$27.95A complete engine rebuild demands precision at every junction—and oil seals are where catastrophic leaks begin. The VINTCO Oil Seal Kit (KOS002) supplies all critical seals and o-rings for Honda lower-end assembly, eliminating the false economy of...09347354- SKU:
- 09347354
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$27.95 -
VINTCO Oil Seal Kit - Honda KOS004
VINTCO
$31.95A proper engine rebuild demands precision sealing throughout the lower end—any compromise here leads to oil weeping, contamination, and premature wear. The VINTCO Oil Seal Kit delivers OEM-quality seals and o-rings engineered to maintain positive...09347356- SKU:
- 09347356
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$31.95 -
VINTCO Oil Seal Kit - Honda KOS003
VINTCO
$27.95A complete engine rebuild demands precision sealing—any leak in your lower end will compromise compression and invite contamination into your oil system. This comprehensive seal kit eliminates the guesswork by bundling all critical seals and o-rings...09347358- SKU:
- 09347358
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$27.95 -
VINTCO Oil Seal Kit - Kawasaki KOS015
VINTCO
$42.95A complete engine rebuild demands precision at every seal point—and this VINTCO Oil Seal Kit eliminates the guesswork by bundling all the critical seals your Kawasaki engine needs in one package. Overlooking even a single oil seal during reassembly...09347359- SKU:
- 09347359
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$42.95 -
VINTCO Oil Seal Kit - Kawasaki KOS017
VINTCO
$42.95A complete engine rebuild demands precision sealing at every critical junction, and this VINTCO Oil Seal Kit delivers exactly that for Kawasaki engines. Compromised seals lead to oil weeping, contamination, and accelerated wear—issues that undermine the...09347360- SKU:
- 09347360
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$42.95 -
VINTCO Oil Seal Kit - Kawasaki KOS013
VINTCO
$39.95A complete engine rebuild demands precision sealing to prevent oil leakage and maintain proper lubrication throughout your lower end. This VINTCO Oil Seal Kit delivers OEM-grade seals and o-rings engineered to factory specifications, ensuring your...09347361- SKU:
- 09347361
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$39.95 -
MOOSE RACING Top End Gasket 8100034MSE
MOOSE RACING
$99.40A quality top-end gasket is critical to preventing oil leaks and maintaining compression integrity in your engine. MOOSE RACING's precision-engineered gasket ensures a reliable seal under high RPM conditions, reducing the risk of costly internal damage...09347460- SKU:
- 09347460
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$99.40 -
MOOSE RACING Top End Gasket - Honda 8100047MSE
MOOSE RACING
$72.98A properly sealed top end is critical to maintaining compression, preventing coolant and oil weeping, and ensuring your engine performs at its peak. The MOOSE RACING Top End Gasket is engineered to Honda specifications and manufactured to OEM tolerances,...09347461- SKU:
- 09347461
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$72.98
