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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PROX Top End Gasket Set - Suzuki 35.3405
PROX
$67.95A quality top-end gasket set is essential for maintaining compression integrity and preventing oil seepage in high-performance applications. The PROX 35.3405 delivers OEM-equivalent sealing with the precision tolerances needed for reliability during...09345740- SKU:
- 09345740
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$67.95 -
PROX Top End Gasket Set - Suzuki 35.3420
PROX
$57.95A compromised top end gasket set is a direct path to coolant leaks, combustion blow-by, and catastrophic engine failure. The PROX Top End Gasket Set for Suzuki engines delivers OEM-equivalent sealing integrity with precision manufacturing, ensuring your...09345742- SKU:
- 09345742
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
$57.95 -
PROX Top End Gasket Set - Kawasaki/Suzuki 35.4021
PROX
$30.95A top-end gasket set is essential for maintaining proper compression and preventing coolant/oil seepage in high-stress racing and performance applications. Whether you're rebuilding after an engine refresh or replacing worn seals on a heavily-used...09345743- SKU:
- 09345743
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
$30.95 -
PROX Top End Gasket Set - Kawasaki/Suzuki 35.4100.90
PROX
$22.95A quality top-end gasket set is non-negotiable for any engine rebuild or head service—it's your barrier against compression loss, oil leakage, and catastrophic failure. The PROX Top End Gasket Set is engineered to OEM specifications for Kawasaki and...09345744- SKU:
- 09345744
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
$22.95 -
PROX Top End Gasket Set - Kawasaki 35.4121
PROX
$25.95A top-end gasket set is essential maintenance for any Kawasaki engine rebuild or high-mileage overhaul. Worn or compromised gaskets lead to oil leaks, compression loss, and potential engine damage—replacements keep your engine sealed tight and performing...09345748- SKU:
- 09345748
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- UNITS:
- SET
$25.95 -
PROX Top End Gasket Set - Kawasaki 35.4125
PROX
$36.95A worn or damaged top end gasket set compromises cylinder head sealing, leading to compression loss, oil leakage, and potential engine damage. The PROX Top End Gasket Set delivers OEM-equivalent sealing with precision-cut materials designed to handle...09345750- SKU:
- 09345750
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
$36.95 -
PROX Top End Gasket Set - Suzuki 35.4198
PROX
$36.95A quality top-end gasket set is essential for maintaining compression and preventing coolant or oil leaks that compromise engine reliability. PROX's OEM-equivalent gasket set ensures proper sealing across critical surfaces, reducing the risk of...09345752- SKU:
- 09345752
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$36.95 -
PROX Top End Gasket Set - Kawasaki 35.4221
PROX
$46.95A top-end gasket set is critical for maintaining compression integrity and preventing oil seepage in high-stress engine environments. Whether you're rebuilding after serious track time or performing routine maintenance, PROX's precision-engineered...09345757- SKU:
- 09345757
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
$46.95 -
PROX Top End Gasket Set - Kawasaki 35.4223
PROX
$46.95A quality top-end gasket set is essential for maintaining compression integrity and preventing costly oil leaks in your Kawasaki engine. PROX's engineering ensures reliable sealing under high RPM conditions, critical whether you're pushing track days or...09345758- SKU:
- 09345758
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
$46.95 -
PROX Top End Gasket Set - Kawasaki 35.4313
PROX
$46.95A properly sealed top end is non-negotiable for maintaining compression, preventing coolant leaks, and ensuring consistent engine performance across heat cycles. The PROX Top End Gasket Set delivers OEM-equivalent sealing integrity with premium materials...09345763- SKU:
- 09345763
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$46.95Qty in Cart: 0Quantity:Price:$46.95Subtotal: -
PROX Top End Gasket Set - Kawasaki 35.4339
PROX
$88.95A quality top-end gasket set is the foundation of a reliable engine rebuild—sealing combustion chambers and preventing oil leaks that compromise performance. PROX's precision-engineered gasket set maintains critical tolerances and withstands the thermal...09345767- SKU:
- 09345767
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- UNITS:
- SET
$88.95 -
PROX Top End Gasket Set - KTM 35.6011
PROX
$22.95A quality gasket set is the foundation of a reliable top end—sealing surfaces under extreme combustion pressures so you can focus on performance, not leaks. The PROX Top End Gasket Set for KTM engines delivers OEM-equivalent sealing integrity with...09345772- SKU:
- 09345772
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
$22.95 -
PROX Top End Gasket Set 35.6012
PROX
$30.95A compromised top end gasket set is a silent killer for engine reliability—allowing coolant and oil seepage that snowballs into catastrophic damage. The PROX 35.6012 Top End Gasket Set delivers factory-spec sealing integrity with premium materials...09345773- SKU:
- 09345773
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
PROX Top End Gasket Set - KTM 35.6018
PROX
$30.95A top-end gasket set is critical to maintaining proper combustion chamber sealing and preventing oil leakage in high-stress racing conditions. The PROX 35.6018 is engineered to OEM specifications for KTM applications, ensuring reliable performance across...09345774- SKU:
- 09345774
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
PROX Top End Gasket Set 35.6019
PROX
$30.95A top-end gasket set is the foundation of a reliable engine rebuild—it seals critical passages between cylinder head and block, preventing coolant and oil leaks that compromise performance and longevity. The PROX 35.6019 delivers OEM-quality sealing...09345775- SKU:
- 09345775
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$30.95 -
PROX Top End Gasket Set - KTM/Husqvarna 35.6113
PROX
$30.95A quality top-end gasket set is essential for maintaining proper compression and preventing fluid leaks in high-stress racing environments. PROX's 35.6113 gasket set is engineered to exact OEM specifications, ensuring reliable sealing across multiple...09345777- SKU:
- 09345777
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
PROX Top End Gasket Set - KTM 35.6218
PROX
$30.95A compromised top end gasket set is a silent killer—fuel and oil escape where they shouldn't, compression drops, and your engine's reliability takes a hit. The PROX Top End Gasket Set for KTM delivers OEM-equivalent sealing integrity with precision...09345779- SKU:
- 09345779
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
$30.95 -
PROX Top End Gasket Set - KTM 35.6222
PROX
$30.95A quality top-end gasket set is the foundation of a reliable rebuild—it seals critical combustion chambers and prevents oil leakage that can compromise engine performance. The PROX 35.6222 is engineered to OEM specifications for KTM engines, ensuring...09345781- SKU:
- 09345781
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
$30.95 -
PROX Top End Gasket Set 35.6227
PROX
$46.95A quality top-end gasket set is the foundation of engine reliability—it seals critical combustion pressures and prevents costly coolant or oil leaks that can sideline your bike or car. The PROX 35.6227 delivers precision-engineered gaskets manufactured...09345782- SKU:
- 09345782
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- UNITS:
- SET
$46.95 -
PROX Top End Gasket Set - KTM 35.6253
PROX
$30.95A top-end gasket set is essential maintenance for any KTM engine that's seen significant track time or mileage. PROX gaskets are precision-engineered to OEM specifications, ensuring reliable sealing under extreme combustion pressures and temperature...09345784- SKU:
- 09345784
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- UNITS:
- SET
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal:
