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 - Honda 34.1227
PROX
MSRP: $199.95Now: $170.00Was: $199.95A complete gasket kit is essential maintenance for any Honda engine rebuild or top-end overhaul, ensuring proper sealing across all critical surfaces and preventing costly fluid leaks that compromise performance and reliability. PROX's comprehensive...09345523- SKU:
- 09345523
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
MSRP: $199.95Now: $170.00Was: $199.95 -
On Sale
PROX Gasket Kit - Complete - Honda 34.1312
PROX
MSRP: $105.95Now: $85.00Was: $105.95A failed gasket can compromise your engine's integrity and lead to costly coolant leaks, oil seepage, and performance loss. The PROX Gasket Kit – Complete delivers OEM-equivalent sealing across all critical engine surfaces, ensuring reliable compression...09345524- SKU:
- 09345524
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $105.95Now: $85.00Was: $105.95 -
On Sale
PROX Gasket Kit - Complete - Honda 34.1409
PROX
MSRP: $104.95Now: $89.00Was: $104.95A complete gasket kit is the foundation of any reliable engine rebuild or refresh. PROX's comprehensive gasket set eliminates the guesswork of sourcing individual seals and gaskets, ensuring every critical sealing surface meets OEM specifications...09345534- SKU:
- 09345534
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
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 34.1422
PROX
MSRP: $214.95Now: $183.00Was: $214.95A complete gasket kit is foundational to reliable engine sealing—it's the difference between peak performance and catastrophic failure. PROX's Honda 34.1422 kit eliminates the guesswork of sourcing individual gaskets by bundling all critical sealing...09345536- SKU:
- 09345536
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $214.95Now: $183.00Was: $214.95Qty in Cart: 0Quantity:Price:MSRP: $214.95Now: $183.00Was: $214.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Yamaha 34.2218
PROX
MSRP: $72.95Now: $59.00Was: $72.95A complete gasket kit is essential for any engine rebuild or top-end refresh—it ensures proper sealing across all critical surfaces and eliminates the risk of coolant or oil leaks that can compromise performance. PROX's complete gasket kit for Yamaha...09345546- SKU:
- 09345546
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
MSRP: $72.95Now: $59.00Was: $72.95 -
On Sale
PROX Gasket Kit - Complete - Yamaha 34.2222
PROX
MSRP: $78.95Now: $64.00Was: $78.95A complete gasket kit is essential for any engine rebuild or top-end service—it ensures a proper seal across all critical joints and prevents oil and coolant leaks that can compromise performance and reliability. Whether you're doing a full overhaul or...09345548- SKU:
- 09345548
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $78.95Now: $64.00Was: $78.95 -
On Sale
PROX Gasket Kit - Complete - Yamaha 34.2225
PROX
MSRP: $99.95Now: $81.00Was: $99.95A complete gasket kit is essential for any engine rebuild or top-end overhaul—it ensures a proper seal across all critical junctures and eliminates the risk of oil leaks or compression loss that can compromise performance. PROX gasket kits are engineered...09345549- SKU:
- 09345549
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $99.95Now: $81.00Was: $99.95 -
On Sale
PROX Gasket Kit - Complete - Yamaha 34.2312
PROX
MSRP: $78.95Now: $64.00Was: $78.95A complete gasket kit is essential for any engine rebuild or top-end overhaul—it ensures proper sealing across all critical interfaces and prevents oil leaks, coolant seepage, and compression loss. The PROX Gasket Kit for Yamaha applications delivers...09345553- SKU:
- 09345553
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
MSRP: $78.95Now: $64.00Was: $78.95Qty in Cart: 0Quantity:Price:MSRP: $78.95Now: $64.00Was: $78.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Yamaha 34.2317
PROX
MSRP: $78.95Now: $64.00Was: $78.95A blown or leaking gasket compromises engine seal integrity, leading to oil seepage, coolant loss, and potential internal damage—especially critical in high-performance applications where reliability is non-negotiable. The PROX Gasket Kit - Complete...09345555- SKU:
- 09345555
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
MSRP: $78.95Now: $64.00Was: $78.95 -
On Sale
PROX Gasket Kit - Complete - Yamaha 34.2322
PROX
MSRP: $83.95Now: $68.00Was: $83.95A complete gasket kit is essential for any engine rebuild or major service on your Yamaha—it ensures a proper seal across all critical engine surfaces and prevents oil leaks, coolant seepage, and compression loss that can compromise performance. Using...09345557- SKU:
- 09345557
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $83.95Now: $68.00Was: $83.95 -
On Sale
PROX Gasket Kit - Complete - Yamaha 34.2401
PROX
MSRP: $147.95Now: $119.00Was: $147.95A complete gasket kit is essential for any engine rebuild or top-end refresh, ensuring proper sealing across all critical junctures and preventing compression loss, oil weeping, and coolant leaks. The PROX Gasket Kit for Yamaha applications delivers...09345558- SKU:
- 09345558
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $147.95Now: $119.00Was: $147.95Qty in Cart: 0Quantity:Price:MSRP: $147.95Now: $119.00Was: $147.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Yamaha 34.2414
PROX
MSRP: $125.95Now: $89.00Was: $125.95A complete gasket kit is essential for any engine rebuild or top-end overhaul, ensuring a perfect seal across all critical engine surfaces. Using OEM-equivalent gaskets prevents oil seepage, coolant leaks, and combustion blow-by that compromise...09345560- SKU:
- 09345560
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $125.95Now: $89.00Was: $125.95Qty in Cart: 0Quantity:Price:MSRP: $125.95Now: $89.00Was: $125.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Yamaha 34.2418
PROX
MSRP: $139.95Now: $119.00Was: $139.95A complete gasket kit is essential insurance against mid-race failures and costly engine rebuilds. PROX delivers factory-spec gasket sets engineered to maintain compression integrity and prevent oil seepage across all critical engine sealing points...09345561- SKU:
- 09345561
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- STREET
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $139.95Now: $119.00Was: $139.95 -
On Sale
PROX Gasket Kit - Complete - Yamaha 34.2420
PROX
MSRP: $139.95Now: $119.00Was: $139.95A complete gasket kit is essential maintenance for any serious engine build or rebuild—worn gaskets lead to compression loss, oil seepage, and potential catastrophic failure. The PROX Gasket Kit for Yamaha engines delivers OEM-equivalent sealing across...09345562- SKU:
- 09345562
- Availability:
- Ships Same Business Day
- Weight:
- 0.39 LBS
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $139.95Now: $119.00Was: $139.95 -
On Sale
PROX Gasket Kit - Complete - Yamaha 34.2426
PROX
MSRP: $199.95Now: $161.00Was: $199.95A complete gasket kit is essential for any engine rebuild or top-end service—it ensures proper sealing across all critical joints, preventing oil leaks and combustion gas escape that compromise performance and reliability. The PROX Gasket Kit for Yamaha...09345565- SKU:
- 09345565
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
MSRP: $199.95Now: $161.00Was: $199.95 -
On Sale
PROX Gasket Kit - Complete - Suzuki 34.3218
PROX
MSRP: $115.95Now: $93.00Was: $115.95A complete gasket kit is essential for any engine rebuild or top-end overhaul, ensuring proper sealing across all critical surfaces and preventing oil and coolant leaks that compromise performance and reliability. The PROX Gasket Kit for Suzuki...09345571- SKU:
- 09345571
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- GASKET KIT
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $115.95Now: $93.00Was: $115.95 -
On Sale
PROX Gasket Kit - Complete - Suzuki 34.3221
PROX
MSRP: $115.95Now: $93.00Was: $115.95A complete gasket kit is essential insurance for any engine rebuild or top-end refresh—it eliminates the guesswork of sourcing individual gaskets and ensures every sealing surface meets OEM specifications. PROX's complete kit for Suzuki engines delivers...09345572- SKU:
- 09345572
- 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: $115.95Now: $93.00Was: $115.95 -
On Sale
PROX Gasket Kit - Complete - Suzuki 34.3224
PROX
MSRP: $109.95Now: $93.00Was: $109.95A complete gasket kit is essential maintenance for preserving engine integrity and preventing costly oil and coolant leaks that compromise performance and reliability. PROX's complete gasket set ensures proper sealing across all critical engine surfaces,...09345573- SKU:
- 09345573
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET KIT
MSRP: $109.95Now: $93.00Was: $109.95 -
On Sale
PROX Gasket Kit - Complete - Suzuki 34.3319
PROX
MSRP: $114.95Now: $98.00Was: $114.95A complete gasket kit is essential for any engine rebuild or top-end overhaul—it ensures a proper seal across all critical surfaces and prevents oil leaks, coolant weeping, and compression loss. PROX's complete gasket set for Suzuki applications...09345577- SKU:
- 09345577
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
MSRP: $114.95Now: $98.00Was: $114.95Qty in Cart: 0Quantity:Price:MSRP: $114.95Now: $98.00Was: $114.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Suzuki 34.3321
PROX
MSRP: $120.95Now: $98.00Was: $120.95A complete gasket kit is essential for any engine rebuild or major service—it ensures proper sealing across all critical interfaces and prevents oil leaks, coolant seepage, and compression loss that can compromise performance and reliability. The PROX...09345578- SKU:
- 09345578
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $120.95Now: $98.00Was: $120.95
