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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MOOSE RACING Complete Gasket Set - Honda 8080039MSE
MOOSE RACING
$142.52A complete engine and transmission rebuild demands gasket integrity you can trust—factory tolerances met without the OEM price tag. MOOSE Racing gasket sets are engineered with high-tech materials...09347463- SKU:
- 09347463
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$142.52 -
MOOSE RACING Complete Gasket Set - Honda 8080046MSE
MOOSE RACING
$194.66A complete engine and transmission rebuild demands precision-fit gaskets that won't fail under load. The MOOSE Racing Complete Gasket Set eliminates the guesswork of sourcing individual components...09347464- SKU:
- 09347464
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$194.66 -
MOOSE RACING Inner Clutch Gasket 816829MSE
MOOSE RACING
$19.21A compromised inner clutch gasket leads to oil seepage, clutch slip, and potential drivetrain damage—making this seal critical to reliable operation. MOOSE Racing's U.S.-manufactured gasket delivers...09347466- SKU:
- 09347466
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.21 -
MOOSE RACING Ignition Cover Gasket - Kawasaki 816830MSE
MOOSE RACING
$9.97A worn or damaged ignition cover gasket compromises engine sealing and can lead to oil leakage, contamination, and performance degradation. This OEM-spec MOOSE Racing gasket restores a reliable seal...09347467- SKU:
- 09347467
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$9.97 -
MOOSE RACING Inner Clutch Gasket 816840MSE
MOOSE RACING
$72.11A worn or degraded inner clutch gasket compromises both sealing integrity and clutch engagement reliability—leading to oil seepage and potential drivetrain issues. The MOOSE RACING Inner Clutch...09347468- SKU:
- 09347468
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$72.11 -
MOOSE RACING Gasket Material - Green - 2 Pack - .032" 403-5011
MOOSE RACING
$34.29Custom gasket material is essential for sealed, leak-free engine and drivetrain assemblies—especially when OEM gaskets don't fit your application or you need to fabricate custom seals for modified...09347527- SKU:
- 09347527
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$34.29 -
On Sale
PROX Water Pump Rebuild Kit - Honda 57.1417
PROX
MSRP: $57.95Now: $47.00Was: $57.95Water pump failure can sideline your Honda when you need it most, leaving you stranded with expensive downtime and potential engine damage. The PROX 57.1417 Rebuild Kit delivers a complete,...09347755- SKU:
- 09347755
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
MSRP: $57.95Now: $47.00Was: $57.95 -
On Sale
PROX Water Pump Rebuild Kit - Kawasaki 57.4327
PROX
MSRP: $57.95Now: $47.00Was: $57.95Water pump failure can sideline your Kawasaki mid-season, but a full rebuild extends component life and restores cooling system reliability without replacing the entire assembly. This PROX kit...09347756- SKU:
- 09347756
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $57.95Now: $47.00Was: $57.95 -
On Sale
PROX Water Pump Rebuild Kit - Husqvarna/KTM 57.6327
PROX
MSRP: $46.95Now: $38.00Was: $46.95A failing water pump doesn't just compromise cooling efficiency—it puts your entire engine at risk. The PROX Water Pump Rebuild Kit for Husqvarna and KTM machines gives you a complete, cost-effective...09347757- SKU:
- 09347757
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
MSRP: $46.95Now: $38.00Was: $46.95 -
On Sale
PROX Water Pump Rebuild Kit - KTM 57.6407
PROX
MSRP: $41.95Now: $34.00Was: $41.95A failing water pump can leave you stranded mid-race or trail, compromising engine cooling when you need it most. This PROX rebuild kit restores your water pump to OEM specifications without the cost...09347758- SKU:
- 09347758
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
MSRP: $41.95Now: $34.00Was: $41.95 -
On Sale
PROX Water Pump Rebuild Kit - Husqvarna/KTM 57.6416
PROX
MSRP: $67.95Now: $55.00Was: $67.95A failing water pump can spell disaster for your engine—overheating, catastrophic damage, and expensive downtime. The PROX Water Pump Rebuild Kit gives you a straightforward way to restore cooling...09347759- SKU:
- 09347759
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $67.95Now: $55.00Was: $67.95 -
On Sale
PROX Top End Gasket Set - Honda 35.1352
PROX
MSRP: $93.95Now: $76.00Was: $93.95A top-end rebuild demands precision sealing—any leak compromises compression and power output. The PROX 35.1352 Gasket Set delivers complete coverage for Honda applications, engineered to OEM...09347760- SKU:
- 09347760
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $93.95Now: $76.00Was: $93.95 -
On Sale
PROX Top End Gasket Set - Honda 35.1421
PROX
MSRP: $93.95Now: $76.00Was: $93.95A top-end rebuild demands precision sealing—any leak or gasket failure undermines engine reliability and performance. The PROX 35.1421 gasket set delivers OEM-grade sealing surfaces manufactured to...09347761- SKU:
- 09347761
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $93.95Now: $76.00Was: $93.95 -
On Sale
PROX Top End Gasket Set - Honda 35.1423
PROX
MSRP: $93.95Now: $76.00Was: $93.95A degraded top-end gasket set compromises compression, invites oil seepage, and forces your engine to work harder than it should. The PROX 35.1423 delivers complete sealing integrity across all...09347762- SKU:
- 09347762
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
MSRP: $93.95Now: $76.00Was: $93.95 -
On Sale
PROX Top End Gasket Set - Yamaha 35.2232
PROX
MSRP: $30.95Now: $25.00Was: $30.95A top-end rebuild demands precision sealing—any leak compromises performance and invites catastrophic engine damage. The PROX 35.2232 gasket set delivers OEM-grade sealing surfaces across your entire...09347763- SKU:
- 09347763
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
MSRP: $30.95Now: $25.00Was: $30.95 -
On Sale
PROX Top End Gasket Set - Yamaha 35.2450
PROX
MSRP: $72.95Now: $59.00Was: $72.95A top-end rebuild demands precision—gasket failure introduces oil leaks, compression loss, and costly engine damage. The PROX 35.2450 Top End Gasket Set delivers the complete complement of OEM-spec...09347764- SKU:
- 09347764
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $72.95Now: $59.00Was: $72.95 -
On Sale
PROX Top End Gasket Set - Yamaha 35.2453
PROX
MSRP: $88.95Now: $72.00Was: $88.95A top-end rebuild demands precision sealing—any leak or gasket failure compromises compression and performance. The PROX Top End Gasket Set delivers OEM-equivalent quality at a fraction of the cost,...09347765- SKU:
- 09347765
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
MSRP: $88.95Now: $72.00Was: $88.95 -
On Sale
PROX Top End Gasket Set - Suzuki 35.3349
PROX
MSRP: $72.95Now: $59.00Was: $72.95A top-end rebuild demands precision sealing—any leak or gap compromises combustion efficiency and reliability. The PROX Top End Gasket Set for Suzuki engines delivers OEM-grade sealing with ProX's...09347767- SKU:
- 09347767
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $72.95Now: $59.00Was: $72.95 -
On Sale
PROX Top End Gasket Set - Kawasaki 35.4350
PROX
MSRP: $78.95Now: $64.00Was: $78.95A top-end rebuild demands precision sealing—any leak compromises compression, power delivery, and engine longevity. The PROX Top End Gasket Set delivers OEM-equivalent sealing performance with...09347768- SKU:
- 09347768
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $78.95Now: $64.00Was: $78.95 -
On Sale
PROX Top End Gasket Set - Kawasaki 35.4431
PROX
MSRP: $99.95Now: $81.00Was: $99.95A failed top-end gasket can compromise compression, cause oil seepage, and force an incomplete rebuild. The PROX 35.4431 gasket set delivers precision-engineered components that seal reliably and...09347770- SKU:
- 09347770
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $99.95Now: $81.00Was: $99.95
