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 RACING Top End Gasket Kit - CRF250 810268
MOOSE RACING
$78.88A quality gasket and seal set is non-negotiable when rebuilding a CRF250 top end—factory gaskets often deteriorate during disassembly, and reusing them risks compression leaks, oil weeping, and premature failure. This MOOSE RACING kit delivers...09341884- SKU:
- 09341884
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$78.88 -
MOOSE RACING Motor Gasket Kit with Seal - CRF250 811268
MOOSE RACING
$204.53An engine rebuild demands precision-fit gaskets and seals that won't compromise your work or wallet. MOOSE Racing delivers OEM-quality components at a fraction of dealership pricing, letting you approach a complete engine and transmission refresh with...09341886- SKU:
- 09341886
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$204.53 -
MOOSE RACING Complete Gasket Kit 808338
MOOSE RACING
$73.12A complete engine and transmission rebuild requires precision sealing—any compromise on gaskets and seals invites leaks, performance loss, and costly failures. The MOOSE RACING Complete Gasket Kit 808338 delivers OEM-quality sealing across your entire...09341907- SKU:
- 09341907
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$73.12 -
MOOSE RACING Motor Gasket Kit with Seal - 65XC/SX 811338
MOOSE RACING
$113.30A complete engine and transmission rebuild requires precision gaskets and seals that won't compromise your build's integrity. OEM replacement parts come with premium pricing, but this Moose Racing kit delivers genuine-quality components at a fraction of...09341908- SKU:
- 09341908
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$113.30 -
MOOSE RACING Top End Gasket Kit - KTM 810340
MOOSE RACING
$25.81A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of OEM pricing, letting you refresh your engine with...09342889- SKU:
- 09342889
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
$25.81Qty in Cart: 0Quantity:Price:$25.81Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM 811340
MOOSE RACING
$89.83A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. The MOOSE RACING Motor Gasket Kit eliminates the frustration of sourcing individual components from multiple suppliers while delivering...09342890- SKU:
- 09342890
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$89.83 -
MOOSE RACING Top End Gasket Kit - KTM 810342
MOOSE RACING
$70.25A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of OEM pricing, so you can confidently refresh...09342891- SKU:
- 09342891
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- STREET
$70.25 -
MOOSE RACING Complete Motor Gasket Kit - Ducati/KTM 808342
MOOSE RACING
$129.09A complete engine rebuild demands gasket and seal components that match OEM precision without the premium price tag. The MOOSE RACING Complete Motor Gasket Kit delivers factory-grade reliability across your entire engine and transmission assembly,...09342892- SKU:
- 09342892
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$129.09Qty in Cart: 0Quantity:Price:$129.09Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM 811342
MOOSE RACING
$164.45Engine rebuilds demand precision—using mismatched or worn gaskets and seals compromises compression, invites oil leakage, and risks catastrophic failure. The MOOSE RACING Motor Gasket Kit delivers OEM-quality seals and gaskets at a fraction of factory...09342894- SKU:
- 09342894
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$164.45 -
MOOSE RACING Motor Gasket Kit with Seal - KTM 811343
MOOSE RACING
$187.20A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't fail under load. The MOOSE RACING Motor Gasket Kit delivers OEM-quality components at a fraction of OEM pricing, letting you rebuild with confidence without...09342895- SKU:
- 09342895
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
$187.20 -
MOOSE RACING Top End Gasket Kit - XR80 810208
MOOSE RACING
$40.11A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of dealer pricing, giving you the confidence to...M810208- SKU:
- M810208
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$40.11 -
MOOSE RACING Clutch Cover Gasket 817200
MOOSE RACING
$10.00A leaking clutch cover gasket compromises engine reliability and creates maintenance headaches. The MOOSE RACING 817200 delivers OEM-equivalent sealing performance at a fraction of OEM pricing, so you can rebuild with confidence without breaking the...M817200- SKU:
- M817200
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$10.00 -
MOOSE RACING Ignition Cover Gasket 817946
MOOSE RACING
$7.20A failing ignition cover gasket can compromise engine sealing and lead to costly oil leaks. The MOOSE RACING Ignition Cover Gasket 817946 delivers OEM-equivalent performance at a fraction of the cost, ensuring reliable sealing whether you're rebuilding...M817247- SKU:
- M817247
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
$7.20Qty in Cart: 0Quantity:Price:$7.20Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - WR250F/YZ250F 808690
MOOSE RACING
$109.67A complete engine rebuild demands precision seals and gaskets that maintain proper compression and prevent fluid leakage under sustained load. The MOOSE RACING Complete Motor Gasket Kit eliminates the frustration of sourcing individual components...09344786- SKU:
- 09344786
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$109.67 -
MOOSE RACING Ignition Cover Gasket 816004
MOOSE RACING
$5.62A worn or leaking ignition cover gasket compromises engine sealing and can lead to oil seepage and contamination. The MOOSE RACING Ignition Cover Gasket delivers OEM-equivalent sealing performance at a fraction of OEM pricing, making it an essential...M816004- SKU:
- M816004
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$5.62 -
MOOSE RACING Motor Gasket Kit with Seal - Husqvarna/KTM 811369
MOOSE RACING
$166.08A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your wallet. This MOOSE RACING kit delivers OEM-quality components at a fraction of dealership pricing, letting you rebuild with confidence...09344791- SKU:
- 09344791
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$166.08 -
MOOSE RACING Motor Gasket Kit with Seal - KX85 811483
MOOSE RACING
$99.49A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—or your wallet. MOOSE RACING delivers OEM-quality components at a fraction of dealer pricing, letting you rebuild with confidence and save on...09344793- SKU:
- 09344793
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$99.49 -
MOOSE RACING Motor Gasket Kit with Seal - KX100 811484
MOOSE RACING
$87.21A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or your budget. MOOSE RACING's comprehensive gasket kit delivers OEM-quality seals at a fraction of dealership pricing, eliminating the...09344794- SKU:
- 09344794
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$87.21 -
MOOSE RACING Motor Gasket Kit with Seal - Yamaha 811690
MOOSE RACING
$151.58Engine and transmission rebuilds demand precision—one mismatched gasket or faulty seal can compromise your entire job and leave you troubleshooting preventable leaks. The MOOSE RACING Motor Gasket Kit eliminates guesswork by delivering OEM-quality seals...09344797- SKU:
- 09344797
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$151.58 -
MOOSE RACING Top End Gasket Kit - XR50R 810209
MOOSE RACING
$30.57When you're rebuilding an XR50R top end, precision gaskets and seals aren't optional—they're the foundation of a reliable engine. This Moose Racing kit delivers every gasket, O-ring, and seal you need in one package, eliminating the hassle of sourcing...09340261- SKU:
- 09340261
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
$30.57
