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 - Yamaha 35.2008
PROX
$25.95A failing top-end gasket set compromises compression, invites oil leaks, and tanks your engine's reliability—exactly what you can't afford mid-race or mid-season. The PROX Top End Gasket Set for Yamaha delivers factory-spec sealing integrity with...09347120- SKU:
- 09347120
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$25.95 -
PROX Top End Gasket Set - Yamaha 35.2129
PROX
$36.95A quality top-end gasket set is non-negotiable for maintaining compression integrity and preventing oil seepage in high-rev applications. Whether you're rebuilding after extended use or preparing for sustained track duty, PROX's engineered gasket...09347123- SKU:
- 09347123
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$36.95 -
PROX Top End Gasket Set - Yamaha 35.2419
PROX
$78.95A quality top-end gasket set is non-negotiable for any engine rebuild or high-mileage refresh—it's your insurance policy against coolant leaks, oil seepage, and compression loss that compromise both performance and reliability. The PROX 35.2419 delivers...09347127- SKU:
- 09347127
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
$78.95 -
PROX Top End Gasket Set - Yamaha 35.2424
PROX
$69.95A top-end gasket set is essential for maintaining reliable compression and preventing coolant or oil leaks in your engine's most critical sealing points. When you're rebuilding your Yamaha top end or replacing worn gaskets, using OEM-equivalent gaskets...09347128- SKU:
- 09347128
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- SET
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
$69.95Qty in Cart: 0Quantity:Price:$69.95Subtotal: -
PROX Top End Gasket Set - Yamaha 35.2434
PROX
$67.95A quality top-end gasket set is non-negotiable for engine reliability—whether you're rebuilding after a full teardown or replacing a failed gasket on the track. The PROX 35.2434 provides complete top-end sealing with OEM-equivalent materials and...09347129- SKU:
- 09347129
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- SET
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
$67.95 -
PROX Top End Gasket Set - Yamaha 35.2439
PROX
$72.95A worn or failed top end gasket set compromises compression, allows coolant and oil seepage, and undermines engine reliability during high-stress racing conditions. PROX's OEM-specification gasket set restores proper sealing without guesswork, ensuring...09347130- SKU:
- 09347130
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
$72.95 -
PROX Top End Gasket Set - Yamaha 35.2448
PROX
$72.95A top-end gasket set is essential for maintaining proper compression and preventing fluid leaks between cylinder head components—critical for consistent performance and reliability whether you're on the track or the trail. PROX's precision-engineered...09347131- SKU:
- 09347131
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- TOP END
$72.95Qty in Cart: 0Quantity:Price:$72.95Subtotal: -
PROX Top End Gasket Set - Yamaha 35.2661
PROX
$99.95A top-end gasket set is critical to maintaining compression integrity and preventing oil seepage in high-stress engine environments. Whether you're rebuilding after a track session or performing routine maintenance, quality gaskets ensure a proper seal...09347133- SKU:
- 09347133
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- RIDING STYLE:
- UTV
- UNITS:
- SET
$99.95 -
PROX Top End Gasket Set - Yamaha 35.2706
PROX
$105.95A quality top-end gasket set is essential for maintaining compression, preventing coolant and oil seepage, and ensuring reliable engine performance during high-demand riding. The PROX 35.2706 delivers OEM-equivalent sealing integrity with...09347134- SKU:
- 09347134
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- UNITS:
- SET
$105.95 -
PROX Top End Gasket Set - Suzuki 35.3001
PROX
$22.95A compromised top end gasket set forces you to choose between a leaking engine and expensive downtime—neither is acceptable when you're chasing performance. PROX's OEM-equivalent gasket set delivers reliable sealing for Suzuki applications, eliminating...09347135- SKU:
- 09347135
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- UNITS:
- SET
$22.95 -
PROX Top End Gasket Set - Kawasaki 35.4317
PROX
$79.95A top-end gasket set is critical for maintaining proper compression and preventing oil leakage in your engine's combustion chamber and valve cover areas. The PROX 35.4317 delivers OEM-equivalent sealing performance with materials engineered to withstand...09347138- SKU:
- 09347138
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$79.95Qty in Cart: 0Quantity:Price:$79.95Subtotal: -
PROX Top End Gasket Set - Kawasaki 35.4426
PROX
$94.95A top-end gasket set is essential maintenance for any Kawasaki engine experiencing high mileage or preparing for a rebuild. Worn gaskets compromise compression, increase blow-by, and can lead to coolant or oil seepage that degrades performance and...09347139- SKU:
- 09347139
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
$94.95Qty in Cart: 0Quantity:Price:$94.95Subtotal: -
PROX Top End Gasket Set - Sea Doo 35.5508
PROX
$82.53A failing top end gasket set compromises your Sea Doo's compression, reliability, and fuel efficiency—leading to costly engine damage if ignored. PROX's OEM-equivalent gasket set restores proper cylinder sealing and prevents coolant or oil leakage...09347143- SKU:
- 09347143
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- SET
$82.53 -
PROX Top End Gasket Set - Sea Doo 35.5512
PROX
$112.68A leaking or worn top end gasket set compromises combustion efficiency and can lead to costly engine damage if left unaddressed. The PROX Top End Gasket Set is engineered to factory specifications, ensuring a reliable seal that restores compression and...09347145- SKU:
- 09347145
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
$112.68 -
PROX Top End Gasket Set 35.6118
PROX
$36.95A quality top-end gasket set is non-negotiable for maintaining compression and preventing oil seepage in your engine. Whether you're rebuilding after a full race season or performing preventive maintenance, the PROX 35.6118 delivers OEM-grade sealing...09347146- SKU:
- 09347146
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$36.95 -
PROX Top End Gasket Set 35.6315
PROX
$88.95A top-end gasket set is critical for maintaining compression integrity and preventing fluid leaks in your engine's combustion chamber. PROX's 35.6315 gasket set delivers the precision fit and material quality required for reliable performance, whether...09347148- SKU:
- 09347148
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$88.95 -
PROX Top End Gasket Set 35.6316
PROX
$88.95A quality top-end gasket set is critical to maintaining compression, preventing oil seepage, and ensuring reliable engine performance across countless heat cycles. The PROX 35.6316 delivers OEM-equivalent sealing with materials engineered to handle...09347149- SKU:
- 09347149
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
$88.95 -
PROX Top End Gasket Set 35.6317
PROX
$72.95A properly sealed top end is non-negotiable for engine reliability and performance. The PROX Top End Gasket Set 35.6317 delivers OEM-equivalent sealing integrity with precision manufacturing, preventing coolant and oil leakage that can compromise your...09347150- SKU:
- 09347150
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$72.95 -
On Sale
PROX Gasket Kit - Complete - Honda 34.1115
PROX
MSRP: $83.95Now: $68.00Was: $83.95A complete gasket kit is foundational to engine reliability—worn or degraded gaskets lead to oil leaks, coolant seepage, and compromised compression that kills performance. The PROX 34.1115 delivers OEM-quality sealing across your Honda engine's critical...09345517- SKU:
- 09345517
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $83.95Now: $68.00Was: $83.95 -
On Sale
PROX Gasket Kit - Complete - Honda 34.1223
PROX
MSRP: $104.95Now: $89.00Was: $104.95A quality gasket kit is the foundation of engine reliability—poor sealing leads to oil leaks, coolant loss, and internal contamination that compromise performance and longevity. The PROX Gasket Kit delivers OEM-equivalent sealing with precision...09345521- SKU:
- 09345521
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $104.95Now: $89.00Was: $104.95Qty in Cart: 0Quantity:Price:MSRP: $104.95Now: $89.00Was: $104.95Subtotal:
