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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MOOSE OFFROAD Complete Gasket Set 8080038MSE
MOOSE OFFROAD
$92.81A complete engine and transmission rebuild demands precision—and gasket failure is the fastest way to undo all your work. This MOOSE OFFROAD Complete Gasket Set eliminates guesswork by delivering...09346888- SKU:
- 09346888
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$92.81 -
MOOSE OFFROAD Gasket Set 8110047MSE
MOOSE OFFROAD
$139.85A complete engine rebuild demands precision sealing at every junction—and this MOOSE OFFROAD gasket set delivers exactly that. By including all gaskets, O-rings, and valve seals in one package, you...09346891- SKU:
- 09346891
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$139.85Qty in Cart: 0Quantity:Price:$139.85Subtotal: -
MOOSE OFFROAD Gasket Clutch Inner - Honda 816326MSE
MOOSE OFFROAD
$23.36A worn or damaged clutch inner gasket compromises engine sealing and invites oil leakage that degrades performance and reliability. This MOOSE OFFROAD gasket delivers OEM-level precision to restore...09346894- SKU:
- 09346894
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$23.36 -
MOOSE OFFROAD Gasket Clutch Inner 816329MSE
MOOSE OFFROAD
$22.32Oil seepage from your clutch cover isn't just messy—it's a sign of a failing gasket that compromises engine cleanliness and performance. The MOOSE OFFROAD Gasket Clutch Inner 816329MSE delivers a...09346895- SKU:
- 09346895
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$22.32Qty in Cart: 0Quantity:Price:$22.32Subtotal: -
MOOSE OFFROAD Gasket Clutch Inner 816341MSE
MOOSE OFFROAD
$20.73A worn or degraded clutch inner gasket compromises your ignition cover's seal, leading to oil seepage, contamination, and potential clutch performance loss. The MOOSE OFFROAD 816341MSE delivers a...09346896- SKU:
- 09346896
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$20.73 -
MOOSE OFFROAD Top End Gasket Set - Gas Gas/Husqvarna/KTM 8100035MSE
MOOSE OFFROAD
$73.01A top-end rebuild demands precision—and this complete gasket set eliminates the guesswork by bundling every seal you need in one package. Whether you're refreshing a high-mileage engine or performing...09346915- SKU:
- 09346915
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$73.01 -
MOOSE OFFROAD Gasket Set with Oil Seal - Honda 8110036MSE
MOOSE OFFROAD
$178.50A complete engine and transmission rebuild demands precision sealing at every junction—and this comprehensive gasket set eliminates the guesswork by including every gasket, O-ring, and valve seal you...09346917- SKU:
- 09346917
- Availability:
- Ships Same Business Day
- Weight:
- 0.39 LBS
$178.50Qty in Cart: 0Quantity:Price:$178.50Subtotal: -
MOOSE OFFROAD Gasket Set - Gas Gas/Husqvarna/KTM 8110044MSE
MOOSE OFFROAD
$166.03A complete engine rebuild demands precision gaskets and seals that won't compromise your engine's integrity under extreme conditions. This MOOSE OFFROAD Gasket Set eliminates the guesswork of...09346918- SKU:
- 09346918
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
$166.03 -
MOOSE OFFROAD Head Cover Gasket - Yamaha 819200MSE
MOOSE OFFROAD
$51.54A leaking valve cover gasket compromises engine efficiency and risks oil contamination of critical engine components. MOOSE OFFROAD Head Cover Gaskets deliver OEM-equivalent sealing performance at a...09346943- SKU:
- 09346943
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
$51.54 -
MOOSE OFFROAD Motor Gasket Kit with Oil Seal - Honda 811285MSE
MOOSE OFFROAD
$179.68Engine rebuilds demand precision sealing to prevent oil leaks, compression loss, and catastrophic failure—this comprehensive gasket kit delivers OEM-quality components without the OEM price tag...09342209- SKU:
- 09342209
- Availability:
- Ships Same Business Day
- Weight:
- 0.53 LBS
$179.68 -
MOOSE OFFROAD Complete Motor Gasket Kit - Honda 808268MSE
MOOSE OFFROAD
$164.97Engine gasket failure compromises reliability and performance—whether you're rebuilding after a teardown or refreshing an aging powerplant. This complete motor gasket kit eliminates the guesswork of...09341885- SKU:
- 09341885
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$164.97Qty in Cart: 0Quantity:Price:$164.97Subtotal: -
On Sale
PROX Gasket Kit - Complete - Suzuki 34.3316
PROX
MSRP: $120.95Now: $98.00Was: $120.95A complete engine rebuild demands precision sealing—and compromising on gasket quality invites oil leaks, compression loss, and catastrophic failure. The PROX Gasket Kit 34.3316 consolidates every...09345576- SKU:
- 09345576
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $120.95Now: $98.00Was: $120.95Qty in Cart: 0Quantity:Price:MSRP: $120.95Now: $98.00Was: $120.95Subtotal: -
On Sale
PROX Top End Gasket Set - Kawasaki KX 450 F 35.4419
PROX
MSRP: $93.95Now: $76.00Was: $93.95A top-end rebuild demands precision gaskets that won't fail under combustion pressures and extreme heat cycles. The PROX Top End Gasket Set eliminates the risk of compression leaks and coolant...09345771- SKU:
- 09345771
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
MSRP: $93.95Now: $76.00Was: $93.95 -
On Sale
PROX Top End Gasket Set - Honda 35.1348
PROX
MSRP: $84.95Now: $72.00Was: $84.95A failing top-end gasket set will compromise cylinder head sealing, leading to coolant leaks, oil seepage, and lost compression—all of which degrade engine performance and reliability. The PROX 35...09347108- SKU:
- 09347108
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $84.95Now: $72.00Was: $84.95 -
On Sale
PROX Top End Gasket Set - Honda 35.1419
PROX
MSRP: $84.95Now: $72.00Was: $84.95A top-end rebuild demands gaskets that won't fail under combustion pressures and thermal cycling. The PROX 35.1419 delivers precision-engineered sealing surfaces using premium materials, ensuring...09347111- SKU:
- 09347111
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $84.95Now: $72.00Was: $84.95Qty in Cart: 0Quantity:Price:MSRP: $84.95Now: $72.00Was: $84.95Subtotal: -
On Sale
PROX Top End Gasket Set - Honda XR650L 35.1623
PROX
MSRP: $67.95Now: $55.00Was: $67.95A top-end rebuild demands precision and reliability—compromise here and you're risking blow-by, compression loss, and catastrophic engine failure. The PROX Top End Gasket Set for the Honda XR650L...09347118- SKU:
- 09347118
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
MSRP: $67.95Now: $55.00Was: $67.95 -
On Sale
PROX Top End Gasket Set - Husqvarna/Gas Gas/KTM 35.6216
PROX
MSRP: $72.95Now: $59.00Was: $72.95A top-end rebuild demands precision—worn gaskets compromise compression, invite oil seepage, and undermine engine reliability. The PROX Top End Gasket Set delivers the complete seal integrity your...09347147- SKU:
- 09347147
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
MSRP: $72.95Now: $59.00Was: $72.95 -
On Sale
PROX Top End Gasket Set - Husqvarna/Gas Gas/KTM 35.6319
PROX
MSRP: $89.95Now: $76.00Was: $89.95A leaking or compromised top-end gasket set will compromise combustion efficiency, increase blow-by, and force you back into the shop. This PROX gasket set delivers the precision fit and material...09347151- SKU:
- 09347151
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
MSRP: $89.95Now: $76.00Was: $89.95Qty in Cart: 0Quantity:Price:MSRP: $89.95Now: $76.00Was: $89.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Suzuki/Kawasaki 34.4021
PROX
MSRP: $59.95Now: $51.00Was: $59.95A complete engine rebuild demands precision sealing at every junction—this PROX Gasket Kit delivers all the OEM-quality gaskets and seals you need to restore compression, eliminate leaks, and ensure...09345587- SKU:
- 09345587
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $59.95Now: $51.00Was: $59.95Qty in Cart: 0Quantity:Price:MSRP: $59.95Now: $51.00Was: $59.95Subtotal: -
On Sale
PROX Gasket Kit - Complete - Suzuki/Kawasaki 34.4100
PROX
MSRP: $46.95Now: $38.00Was: $46.95A complete engine rebuild demands precision—gaskets that seal consistently under load, valve stem seals that hold pressure, and every component engineered to specification. This PROX kit delivers...09345589- SKU:
- 09345589
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $46.95Now: $38.00Was: $46.95Qty in Cart: 0Quantity:Price:MSRP: $46.95Now: $38.00Was: $46.95Subtotal:
