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!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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WINDEROSA Top End Gasket Kit - Yamaha 650 610119
WINDEROSA
$62.78A top-end gasket kit is essential for restoring cylinder head sealing integrity and preventing coolant or oil leakage that compromises engine reliability. Whether you're rebuilding after high-mileage wear or performing preventative maintenance,...PD812500- SKU:
- PD812500
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$62.78 -
WINDEROSA Top End Gasket Kit - Yamaha 701 610601
WINDEROSA
$63.12A top-end gasket failure can leave your Yamaha 701 sidelined with costly downtime. The WINDEROSA Top End Gasket Kit delivers OEM-grade sealing across all critical interfaces, ensuring reliable compression and eliminating leaks that compromise performance...PD812530- SKU:
- PD812530
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
$63.12 -
WINDEROSA Top End Gasket Kit - Yamaha 760 610603
WINDEROSA
$89.05A top-end gasket kit is essential maintenance for any Yamaha 760 engine—whether you're rebuilding after high hours or refreshing a recently acquired unit. WINDEROSA's OEM-quality gasket set ensures proper compression sealing across all critical surfaces,...PD812535- SKU:
- PD812535
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
$89.05 -
WINDEROSA Top End Gasket Kit - Yamaha 1200 610606
WINDEROSA
$151.95A top-end gasket failure can compromise your entire engine's integrity, leading to costly downtime and performance loss. The WINDEROSA Top End Gasket Kit delivers OEM-grade sealing across all critical surfaces, ensuring reliable combustion chamber...PD812543- SKU:
- PD812543
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$151.95 -
WINDEROSA Complete Gasket Kit - JS750SS/XI-R 611407
WINDEROSA
$95.95Engine gasket failure can compromise your entire drivetrain and lead to costly downtime. The WINDEROSA Complete Gasket Kit delivers OEM-equivalent sealing across all critical engine junction points, ensuring reliable performance whether you're rebuilding...09340266- SKU:
- 09340266
- Availability:
- Ships Same Business Day
- Weight:
- 0.59 LBS
- PRODUCT NAME:
- GASKET SET
- TYPE:
- COMPLETE
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
$95.95 -
WINDEROSA Complete Gasket Kit - Tigershark 611503
WINDEROSA
$163.08Engine gasket failure leads to oil leaks, compression loss, and catastrophic damage—preventing these issues starts with a quality gasket set during rebuilds or major service. The WINDEROSA Complete Gasket Kit delivers comprehensive coverage across your...09340512- SKU:
- 09340512
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- COMPLETE
$163.08 -
WINDEROSA Complete Gasket Kit - Sea-Doo 611209
WINDEROSA
$110.12A complete gasket kit is essential maintenance for any Sea-Doo engine rebuild or major service. Worn or degraded gaskets lead to fluid leaks, compression loss, and premature engine wear—problems that compromise both performance and reliability. The...09340514- SKU:
- 09340514
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- COMPLETE
$110.12 -
WINDEROSA Top End Gasket Kit - Yamaha 610608
WINDEROSA
$231.22A blown or deteriorated top-end gasket kit will compromise combustion sealing and cause coolant or oil weeping, leading to overheating and potential engine damage. The WINDEROSA 610608 Top End Gasket Kit restores proper sealing surfaces across your...09340724- SKU:
- 09340724
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
$231.22 -
WINDEROSA Complete Gasket Kit - Sea-Doo 611110
WINDEROSA
$92.30Engine gasket failure doesn't just cost you money—it costs you race time and reliability. The WINDEROSA Complete Gasket Kit ensures proper sealing across all critical engine surfaces, preventing oil leaks, coolant seepage, and combustion blow-by that...09340725- SKU:
- 09340725
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
$92.30 -
WINDEROSA Complete Gasket Kit - Kawasaki 440 611101
WINDEROSA
$84.47A complete gasket failure can sideline your 440 engine and leave you stranded. WINDEROSA's full gasket kit eliminates guesswork by providing every seal and gasket your engine needs in one package, saving you time sourcing individual components and...PD810310- SKU:
- PD810310
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
- TYPE:
- COMPLETE
- RIDING STYLE:
- WATERCRAFT
$84.47Qty in Cart: 0Quantity:Price:$84.47Subtotal: -
WINDEROSA Complete Gasket Kit - Kawasaki 550 611103
WINDEROSA
$91.38Engine gasket failure compromises compression, invites fluid leaks, and can force an unplanned teardown. The WINDEROSA Complete Gasket Kit eliminates guesswork by bundling every critical seal your Kawasaki 550 needs in one OEM-quality package...PD810330- SKU:
- PD810330
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
- TYPE:
- COMPLETE
- RIDING STYLE:
- WATERCRAFT
$91.38 -
WINDEROSA Top End Gasket Kit - Sea Doo 580 610200
WINDEROSA
$54.30A worn or damaged gasket kit compromises combustion chamber sealing, leading to compression loss, oil leakage, and reduced engine performance. The WINDEROSA Top End Gasket Kit restores proper sealing across critical engine surfaces, ensuring reliable...PD810402- SKU:
- PD810402
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- TYPE:
- TOP END
$54.30 -
WINDEROSA Gasket - Complete - Sea Doo 611216
WINDEROSA
$239.70A complete gasket set is essential maintenance for any Sea Doo engine experiencing leaks, blow-by, or performance loss. WINDEROSA's OEM-equivalent gasket set ensures proper sealing across all critical engine surfaces, restoring compression and preventing...09346559- SKU:
- 09346559
- Availability:
- Ships Same Business Day
- Weight:
- 0.97 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
$239.70 -
WINDEROSA Gasket - Top End - 1200/1500 610417
WINDEROSA
$170.28A properly sealed top end is non-negotiable for engine reliability and performance consistency. This WINDEROSA gasket set eliminates guesswork by providing all critical sealing surfaces in one package, preventing oil weeping, combustion leakage, and the...09346552- SKU:
- 09346552
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$170.28 -
WINDEROSA Gasket - Top End - 1500 Ultra 610419
WINDEROSA
$311.17A reliable top-end gasket set is critical for maintaining compression integrity and preventing oil seepage in high-performance engines. The WINDEROSA 610419 delivers OEM-quality sealing across all top-end surfaces, ensuring your 1500 Ultra runs clean and...09346553- SKU:
- 09346553
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
$311.17 -
WINDEROSA Gasket - Top End - 300 Ultra 610420
WINDEROSA
$219.00A worn or damaged top-end gasket set compromises combustion seal integrity, leading to compression loss, oil leakage, and potential engine damage. The WINDEROSA 300 Ultra gasket set delivers OEM-equivalent sealing performance with comprehensive coverage...09346554- SKU:
- 09346554
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
$219.00 -
WINDEROSA Gasket - Top End - 310 Ultra 610421
WINDEROSA
$219.00A properly sealed top end is non-negotiable for engine reliability and performance consistency. The WINDEROSA 310 Ultra gasket set delivers OEM-quality sealing across critical combustion chamber interfaces, preventing compression loss and coolant leakage...09346555- SKU:
- 09346555
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
$219.00 -
WINDEROSA Gasket - Top End - 800 WaveRunner 610607
WINDEROSA
$113.22Top-end gasket sets are critical to maintaining compression integrity and preventing coolant or oil seepage in high-performance watercraft. The WINDEROSA gasket set for 800 WaveRunner engines delivers OEM-quality sealing with U.S.-made construction,...09346556- SKU:
- 09346556
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
$113.22 -
WINDEROSA Gasket - Top End - Polaris 610812
WINDEROSA
$94.12A failed top-end gasket will compromise combustion sealing and accelerate wear on critical engine surfaces. This WINDEROSA gasket set delivers the OEM-equivalent sealing integrity your Polaris 610812 engine demands, whether you're running stock power or...09346558- SKU:
- 09346558
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
$94.12 -
WINDEROSA Gasket - Complete - Ultra 150 611411
WINDEROSA
$185.08A complete gasket set is non-negotiable for any engine rebuild or top-end refresh—it ensures a sealed, leak-free assembly that maintains compression and prevents fluid weeping at critical junction points. The WINDEROSA Gasket - Complete - Ultra 150...09346561- SKU:
- 09346561
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
- UNITS:
- KIT
$185.08
