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 Head Cover Gasket - Suzuki 817961
MOOSE RACING
$28.34OEM valve cover gaskets come with premium pricing and unnecessary complexity. The Moose Racing Head Cover Gasket delivers genuine OEM-level sealing performance at a fraction of the cost, allowing you to rebuild your engine without compromise. Whether...09346182- SKU:
- 09346182
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- TYPE:
- VALVE COVER
- UNITS:
- EACH
$28.34Qty in Cart: 0Quantity:Price:$28.34Subtotal: -
MOOSE RACING Gasket Set with Seals - Yamaha 811977
MOOSE RACING
$133.72Engine gasket sets are critical for maintaining compression, preventing fluid leaks, and ensuring reliable performance—especially in high-demand racing applications where even minor seal failures can sideline your machine. The MOOSE RACING Gasket Set...09346929- SKU:
- 09346929
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
$133.72 -
MOOSE RACING Gasket Clutch Inner - Yamaha 816082
MOOSE RACING
$13.91A worn or damaged clutch gasket compromises your engine's sealing integrity, leading to oil leaks and potential power loss—especially critical in high-rpm racing environments. The MOOSE RACING Gasket Clutch Inner is engineered to restore a factory-tight...09346930- SKU:
- 09346930
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH INNER
$13.91 -
MOOSE RACING Gasket Clutch Inner - Yamaha 816150
MOOSE RACING
$11.64A failing clutch gasket can compromise your entire drivetrain's integrity, leading to fluid leaks, loss of pressure, and catastrophic clutch failure at the worst possible moment. The MOOSE RACING Gasket Clutch Inner delivers OEM-equivalent sealing with...09346932- SKU:
- 09346932
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH INNER
- UNITS:
- EACH
$11.64 -
MOOSE RACING Ignition Cover Gasket 816151
MOOSE RACING
$7.28A worn or damaged ignition cover gasket compromises engine sealing, risking oil leakage and potential internal contamination—exactly what you can't afford during competition or high-mileage operation. The MOOSE RACING Ignition Cover Gasket delivers...09346933- SKU:
- 09346933
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
$7.28 -
MOOSE RACING Ignition Cover Gasket 816178
MOOSE RACING
$10.95A properly sealed ignition cover is critical to maintaining engine reliability and preventing oil seepage that can compromise electrical components. The MOOSE RACING Ignition Cover Gasket 816178 delivers OEM-equivalent sealing performance with the...09346935- SKU:
- 09346935
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- IGNITION COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$10.95Qty in Cart: 0Quantity:Price:$10.95Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - 350SXF 811339
MOOSE RACING
$165.87A complete engine and transmission rebuild demands precision-fit gaskets and seals—any compromise here leads to leaks, performance loss, and costly rework. The MOOSE RACING Motor Gasket Kit delivers OEM-quality sealing at a fraction of dealership...09342210- SKU:
- 09342210
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
$165.87 -
MOOSE RACING Motor Gasket Kit with Seal - RMZ250 811567
MOOSE RACING
$175.51A complete engine and transmission rebuild requires precision-fit gaskets and seals—compromising on quality means risking oil leaks, compression loss, and premature wear. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent performance at a fraction...09342211- SKU:
- 09342211
- Availability:
- Ships Same Business Day
- Weight:
- 0.49 LBS
$175.51 -
MOOSE RACING Motor Gasket Kit with Seal - YZ450F 811689
MOOSE RACING
$194.87A complete engine and transmission rebuild demands precision-fit gaskets and seals—compromising on quality here risks leaks, contamination, and catastrophic failure. The MOOSE RACING Motor Gasket Kit eliminates guesswork by providing every gasket and...09342212- SKU:
- 09342212
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$194.87 -
MOOSE RACING Ignition Cover Gasket 816705
MOOSE RACING
$10.63A leaking ignition cover gasket compromises engine sealing and can lead to oil seepage that damages adjacent components. This MOOSE RACING replacement gasket delivers OEM-quality sealing at a fraction of dealership pricing, making it an economical choice...09342213- SKU:
- 09342213
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
$10.63 -
MOOSE RACING Clutch Cover Gasket 817942
MOOSE RACING
$8.21A leaking clutch cover gasket compromises engine integrity and invites costly oil seepage into your ignition system. The MOOSE RACING Clutch Cover Gasket 817942 delivers OEM-equivalent sealing with high-tech materials engineered for the demands of both...09342214- SKU:
- 09342214
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$8.21Qty in Cart: 0Quantity:Price:$8.21Subtotal: -
MOOSE RACING Complete Gasket Kit 808337
MOOSE RACING
$63.10A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. The MOOSE RACING Complete Gasket Kit delivers OEM-quality components at a fraction of dealership pricing, giving you the confidence to...09341954- SKU:
- 09341954
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$63.10 -
MOOSE RACING Top End Gasket Kit - KTM105 SX/XC 810332
MOOSE RACING
$44.42A top-end rebuild demands precision seals and gaskets that won't compromise engine integrity or performance. The MOOSE RACING Top End Gasket Kit gives you OEM-quality components at a fraction of factory pricing, so you can confidently refresh your KTM...09341955- SKU:
- 09341955
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
$44.42 -
MOOSE RACING Motor Gasket Kit with Seal - KTM 105SX 811332
MOOSE RACING
$126.65A complete engine and transmission rebuild requires precision-fit gaskets and seals—any compromise on fit or material quality risks oil leaks, contamination, and catastrophic failure. The MOOSE RACING Motor Gasket Kit eliminates that risk by supplying...09341957- SKU:
- 09341957
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$126.65Qty in Cart: 0Quantity:Price:$126.65Subtotal: -
MOOSE RACING Clutch Cover Gasket 817253
MOOSE RACING
$7.49A leaking clutch cover gasket compromises engine sealing and can lead to oil loss and contamination—exactly what you don't need mid-race or during a rebuild. The MOOSE RACING 817253 clutch cover gasket delivers OEM-equivalent sealing performance at a...M817253- SKU:
- M817253
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- UNITS:
- EACH
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$7.49 -
MOOSE RACING Complete Motor Gasket Kit - KTM 50SX 808312
MOOSE RACING
$32.09A complete engine and transmission rebuild demands precision gaskets and seals that won't fail mid-season. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a fraction of the cost, giving you the confidence to push your KTM...09340140- SKU:
- 09340140
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$32.09 -
MOOSE RACING Complete Motor Gasket Kit - DR350 808584
MOOSE RACING
$93.43A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't fail mid-season. This MOOSE RACING kit eliminates the guesswork of sourcing individual components, giving you every gasket, o-ring, and seal needed for a...09340142- SKU:
- 09340142
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$93.43 -
MOOSE RACING Complete Motor Gasket Kit - KX125 808425
MOOSE RACING
$80.32A complete engine and transmission rebuild demands precision gaskets and seals that won't fail under load—the MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a fraction of the cost. This comprehensive set eliminates multiple...M808425- SKU:
- M808425
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
$80.32 -
MOOSE RACING Complete Motor Gasket Kit - KX125 808429
MOOSE RACING
$87.56A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your motor's integrity. This Moose Racing kit delivers OEM-quality components at a fraction of the cost, giving you the confidence to rebuild without...M808429- SKU:
- M808429
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$87.56 -
MOOSE RACING Ignition Cover Gasket 816031
MOOSE RACING
$9.53A leaking ignition cover gasket compromises engine sealing and can lead to oil seepage that damages surrounding components. The MOOSE RACING Ignition Cover Gasket 816031 delivers OEM-quality sealing performance at a fraction of OEM pricing, making it an...09340579- SKU:
- 09340579
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- TYPE:
- IGNITION COVER
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
$9.53
