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...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
$67.95Qty in Cart: 0Quantity:Price:$67.95Subtotal: -
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...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...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...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
$22.95Qty in Cart: 0Quantity:Price:$22.95Subtotal: -
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...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...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...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...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...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...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...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
$88.95Qty in Cart: 0Quantity:Price:$88.95Subtotal: -
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...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...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
$30.95 -
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...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...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...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...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...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
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
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...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...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
$30.95
