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 replacement costs, allowing you to restore cooling...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 reliability and lap times. The PROX Water Pump Rebuild...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 cooling performance with precision-engineered internal...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 of replacement cost, restoring your cooling system to...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 non-negotiable. This PROX rebuild kit restores your Suzuki water...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 system reliability without replacing the entire pump...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
$36.95 -
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 entire assembly, letting you get back to peak cooling...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, gaskets, and internal components to restore your pump to...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, gaskets, and internal components to restore your pump to...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 pump to OEM specifications with precision-engineered...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 addressing head gasket failure, PROX delivers...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
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
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 Honda 34.1218 provides OEM-equivalent sealing across all...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 specifications. PROX's complete Honda gasket kit delivers the...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: $93.95 -
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 performance and reliability. Using OEM-equivalent gaskets...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 compression loss. The PROX Gasket Kit for Honda...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 Gasket Kit delivers OEM-quality sealing across your...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 could compromise performance. PROX's complete gasket...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 OEM-specification gaskets engineered for precision Suzuki...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 individual gaskets from multiple suppliers, the PROX...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 PROX Gasket Kit provides OEM-equivalent sealing surfaces...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:
