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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On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4223
PROX
MSRP: $99.95Now: $85.00Was: $99.95A complete gasket kit is essential for any engine rebuild or top-end refresh, ensuring proper sealing across all critical surfaces and preventing oil leaks that compromise performance and engine longevity. The PROX Gasket Kit for Kawasaki applications...09345599- SKU:
- 09345599
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
MSRP: $99.95Now: $85.00Was: $99.95Qty in Cart: 0Quantity:Price:MSRP: $99.95Now: $85.00Was: $99.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4339
PROX
MSRP: $162.95Now: $132.00Was: $162.95A complete gasket kit is essential for any engine rebuild or top-end service—sealing failures can compromise compression, cause oil leaks, and degrade performance. The PROX Gasket Kit for Kawasaki eliminates guesswork by providing OEM-equivalent gaskets...09345606- SKU:
- 09345606
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $162.95Now: $132.00Was: $162.95 -
On Sale
PROX Gasket Kit - Complete - KTM 34.6340
PROX
MSRP: $99.95Now: $81.00Was: $99.95A complete gasket kit is the foundation of a reliable engine rebuild or top-end refresh. Whether you're addressing a leak, performing preventive maintenance, or building a high-revving motor, having OEM-equivalent gaskets ensures proper sealing across...09345633- SKU:
- 09345633
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- STREET
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $99.95Now: $81.00Was: $99.95 -
On Sale
PROX Top End Gasket Set - Honda 35.1210
PROX
MSRP: $39.95Now: $34.00Was: $39.95A quality top-end gasket set is non-negotiable for engine reliability—it's your first line of defense against coolant and oil leaks that can compromise performance and longevity. The PROX 35.1210 delivers OEM-grade sealing surfaces and precision...09345656- SKU:
- 09345656
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
MSRP: $39.95Now: $34.00Was: $39.95Qty in Cart: 0Quantity:Price:MSRP: $39.95Now: $34.00Was: $39.95Subtotal: -
On Sale
PROX Top End Gasket Set - Honda 35.1220
PROX
MSRP: $39.95Now: $34.00Was: $39.95A properly sealed top end is non-negotiable for engine reliability and performance consistency. The PROX Top End Gasket Set ensures your Honda maintains optimal compression and prevents coolant or oil seepage that can compromise power output and...09345658- SKU:
- 09345658
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
MSRP: $39.95Now: $34.00Was: $39.95Qty in Cart: 0Quantity:Price:MSRP: $39.95Now: $34.00Was: $39.95Subtotal: -
On Sale
PROX Top End Gasket Set - Honda 35.1236
PROX
MSRP: $44.95Now: $38.00Was: $44.95A quality top end gasket set is critical to maintaining cylinder head integrity and preventing coolant or oil seepage that compromises engine reliability. The PROX 35.1236 delivers OEM-equivalent sealing performance with superior material consistency,...09345664- SKU:
- 09345664
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
MSRP: $44.95Now: $38.00Was: $44.95Qty in Cart: 0Quantity:Price:MSRP: $44.95Now: $38.00Was: $44.95Subtotal: -
On Sale
PROX Top End Gasket Set - Honda 35.1322
PROX
MSRP: $39.95Now: $34.00Was: $39.95A top-end gasket set is critical for maintaining combustion chamber seal integrity and preventing oil seepage that compromises performance and reliability. The PROX 35.1322 delivers OEM-equivalent sealing with precision-engineered materials designed to...09345669- SKU:
- 09345669
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
MSRP: $39.95Now: $34.00Was: $39.95Qty in Cart: 0Quantity:Price:MSRP: $39.95Now: $34.00Was: $39.95Subtotal: -
On Sale
PROX Top End Gasket Set - Kawasaki/Suzuki 35.4334
PROX
MSRP: $62.95Now: $51.00Was: $62.95A top-end gasket set is essential for maintaining compression integrity and preventing coolant or oil seepage in high-performance applications. PROX gaskets are engineered to OEM specifications with precise tolerances, ensuring reliable sealing across...09345766- SKU:
- 09345766
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
MSRP: $62.95Now: $51.00Was: $62.95Qty in Cart: 0Quantity:Price:MSRP: $62.95Now: $51.00Was: $62.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit Honda P400210475013
ATHENA
MSRP: $30.95Now: $28.00Was: $30.95Water pump gasket failure compromises your cooling system's integrity, risking overheating and catastrophic engine damage. The ATHENA P400210475013 kit provides OEM-specification gaskets and seals needed to restore a reliable seal without the expense of...09346372- SKU:
- 09346372
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
MSRP: $30.95Now: $28.00Was: $30.95Qty in Cart: 0Quantity:Price:MSRP: $30.95Now: $28.00Was: $30.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit Honda P400210475015
ATHENA
MSRP: $27.95Now: $25.00Was: $27.95Gasket and seal failure is one of the most common causes of coolant leaks and oil seepage in Honda engines, leading to overheating and potential engine damage if left unaddressed. The ATHENA Water Pump Gasket Kit provides a complete sealing solution with...09346374- SKU:
- 09346374
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $27.95Now: $25.00Was: $27.95Qty in Cart: 0Quantity:Price:MSRP: $27.95Now: $25.00Was: $27.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit KTM/Husqvarna P400270475021
ATHENA
MSRP: $50.95Now: $46.00Was: $50.95Coolant leaks and seal failures compromise engine reliability and performance, especially in high-demand riding conditions. The ATHENA Water Pump Gasket Kit delivers OEM-quality sealing components engineered to prevent fluid loss and maintain optimal...09346382- SKU:
- 09346382
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- WATER PUMP
MSRP: $50.95Now: $46.00Was: $50.95Qty in Cart: 0Quantity:Price:MSRP: $50.95Now: $46.00Was: $50.95Subtotal:
