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
-
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...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...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...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...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...09342889- SKU:
- 09342889
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
$25.81 -
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...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...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...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...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...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...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...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...M817247- SKU:
- M817247
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
$7.20 -
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...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...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...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...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
$99.49Qty in Cart: 0Quantity:Price:$99.49Subtotal: -
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...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...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...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
