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 Water Pump Rebuild Kit - Kawasaki 57.4026
PROX
$39.95Water pump failure is one of the most common causes of catastrophic engine damage in high-performance applications. The PROX Water Pump Rebuild Kit gives you OEM-quality components at a fraction of...09347040- SKU:
- 09347040
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
PROX Water Pump Rebuild Kit - Kawasaki 57.4315
PROX
$44.95A failing water pump compromises engine cooling efficiency and risks catastrophic overheating—especially critical in high-performance or racing applications where thermal management directly impacts...09347047- SKU:
- 09347047
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
$44.95Qty in Cart: 0Quantity:Price:$44.95Subtotal: -
PROX Water Pump Rebuild Kit - Kawasaki 57.4317
PROX
$41.95A failing water pump compromises engine cooling efficiency and risks catastrophic overheating during high-stress riding or racing conditions. The PROX Water Pump Rebuild Kit restores OEM-level...09347049- SKU:
- 09347049
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$41.95 -
PROX Water Pump Rebuild Kit - Kawasaki 57.4319
PROX
$44.95A failing water pump compromises engine cooling efficiency and puts your motor at risk of catastrophic overheating. The PROX Water Pump Rebuild Kit gives you OEM-equivalent components at a fraction...09347051- SKU:
- 09347051
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$44.95Qty in Cart: 0Quantity:Price:$44.95Subtotal: -
PROX Water Pump Rebuild Kit - Suzuki 57.4324
PROX
$39.95A failing water pump compromises cooling system efficiency and risks catastrophic engine damage—particularly critical in high-performance and racing applications where thermal management is...09347052- SKU:
- 09347052
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
PROX Water Pump Rebuild Kit - Kawasaki 57.4429
PROX
$36.95A failing water pump doesn't just risk overheating—it threatens catastrophic engine damage and costly downtime. The PROX Water Pump Rebuild Kit gives you a straightforward way to restore cooling...09347060- SKU:
- 09347060
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$36.95Qty in Cart: 0Quantity:Price:$36.95Subtotal: -
PROX Water Pump Rebuild Kit 57.6316
PROX
$39.95A failing water pump can leave you stranded mid-race or destroy an engine in minutes. The PROX Water Pump Rebuild Kit 57.6316 gives you OEM-quality restoration without the cost of replacing the...09347072- SKU:
- 09347072
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
PROX Water Pump Rebuild Kit 57.6321
PROX
$39.95A failing water pump doesn't just risk overheating—it compromises engine reliability and performance when you need it most. The PROX Water Pump Rebuild Kit 57.6321 gives you OEM-quality seals,...09347074- SKU:
- 09347074
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
PROX Water Pump Rebuild Kit 57.6324
PROX
$41.95A failing water pump doesn't just compromise cooling efficiency—it puts your entire engine at risk of catastrophic overheating. The PROX Water Pump Rebuild Kit 57.6324 gives you OEM-quality seals,...09347077- SKU:
- 09347077
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$41.95Qty in Cart: 0Quantity:Price:$41.95Subtotal: -
PROX Water Pump Rebuild Kit 57.6325
PROX
$24.95A failing water pump doesn't just compromise cooling efficiency—it threatens catastrophic engine damage under racing conditions or extended use. The PROX Water Pump Rebuild Kit 57.6325 restores your...09347078- SKU:
- 09347078
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$24.95Qty in Cart: 0Quantity:Price:$24.95Subtotal: -
PROX Top End Gasket Set - Yamaha 35.2018
PROX
$30.95A top-end gasket set is critical for maintaining compression integrity and preventing coolant or oil seepage in your engine's most vulnerable areas. Whether you're rebuilding after a race season or...09347121- SKU:
- 09347121
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$30.95 -
On Sale
PROX Gasket Kit - Complete - Honda 34.1218
PROX
MSRP: $89.95Now: $76.00Was: $89.95A complete gasket kit is essential for any engine rebuild or major service, as failing gaskets lead to fluid leaks, compression loss, and potential engine damage. The PROX Gasket Kit – Complete for...09345519- SKU:
- 09345519
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $89.95Now: $76.00Was: $89.95Qty in Cart: 0Quantity:Price:MSRP: $89.95Now: $76.00Was: $89.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Honda 34.1220
PROX
MSRP: $93.95Now: $76.00Was: $93.95A complete gasket kit is essential for any engine rebuild or head gasket replacement—it eliminates the risk of mixing incompatible components and ensures every sealing surface meets OEM...09345520- SKU:
- 09345520
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $93.95Now: $76.00Was: $93.95Qty in Cart: 0Quantity:Price:MSRP: $93.95Now: $76.00Was: $93.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Honda 34.1224
PROX
MSRP: $104.95Now: $89.00Was: $104.95A complete gasket kit is essential for any engine rebuild or top-end service—it ensures a proper seal across all critical engine surfaces and prevents oil and coolant leaks that compromise...09345522- SKU:
- 09345522
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- 2-STROKE
- 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: -
On Sale
PROX Gasket Kit - Complete - Honda 34.1322
PROX
MSRP: $105.95Now: $85.00Was: $105.95A complete gasket kit is the foundation of a reliable engine rebuild or refresh. Over time, gaskets degrade and lose their sealing integrity, leading to oil leaks, coolant seepage, and potential...09345526- SKU:
- 09345526
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
MSRP: $105.95Now: $85.00Was: $105.95 -
On Sale
PROX Gasket Kit - Complete - Honda 34.1334
PROX
MSRP: $184.95Now: $157.00Was: $184.95A complete gasket kit is essential for any engine rebuild or overhaul—preventing oil seepage, coolant leaks, and combustion chamber compromise that can undermine all your performance work. The PROX...09345529- SKU:
- 09345529
- 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: $184.95Now: $157.00Was: $184.95Qty in Cart: 0Quantity:Price:MSRP: $184.95Now: $157.00Was: $184.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Honda 34.1416
PROX
MSRP: $130.95Now: $106.00Was: $130.95A complete gasket kit is essential for any Honda engine rebuild or overhaul—it ensures a proper seal across all critical engine surfaces and eliminates the risk of oil leaks or compression loss that...09345535- SKU:
- 09345535
- 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: $130.95Now: $106.00Was: $130.95 -
On Sale
PROX Gasket Kit - Complete - Suzuki 34.3122
PROX
MSRP: $74.95Now: $64.00Was: $74.95Engine gasket failure can compromise your entire build, leading to oil leaks, coolant seepage, and catastrophic performance loss. The PROX Complete Gasket Kit eliminates guesswork by providing...09345569- SKU:
- 09345569
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
MSRP: $74.95Now: $64.00Was: $74.95Qty in Cart: 0Quantity:Price:MSRP: $74.95Now: $64.00Was: $74.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4027
PROX
MSRP: $63.15Now: $54.00Was: $63.15A complete gasket kit is essential for any engine rebuild or major service on your Kawasaki—engine sealing integrity directly impacts compression, reliability, and performance. Rather than sourcing...09345588- SKU:
- 09345588
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
MSRP: $63.15Now: $54.00Was: $63.15Qty in Cart: 0Quantity:Price:MSRP: $63.15Now: $54.00Was: $63.15Subtotal: -
On Sale
PROX Gasket Kit - Complete - Kawasaki 34.4218
PROX
MSRP: $94.95Now: $81.00Was: $94.95A complete gasket kit is essential for any engine rebuild or major service on your Kawasaki—sealing failures can compromise compression, cause oil leaks, and lead to catastrophic engine damage. The...09345597- SKU:
- 09345597
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- ENGINE TYPE:
- 2-STROKE
MSRP: $94.95Now: $81.00Was: $94.95Qty in Cart: 0Quantity:Price:MSRP: $94.95Now: $81.00Was: $94.95Subtotal:
