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 Clutch Cover Gasket 817489
MOOSE RACING
$6.43A failing clutch cover gasket can lead to oil seepage, contamination, and premature wear on your clutch assembly—compromising both reliability and performance. The MOOSE RACING Clutch Cover Gasket 817489 delivers OEM-equivalent fitment and durability at...M817489- SKU:
- M817489
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$6.43Qty in Cart: 0Quantity:Price:$6.43Subtotal: -
MOOSE RACING Clutch Cover Gasket 817496
MOOSE RACING
$11.64A leaking clutch cover gasket compromises both engine performance and reliability—allowing oil seepage that can damage internal components and create a messy engine bay. The MOOSE RACING Clutch Cover Gasket delivers OEM-quality sealing with precision...M817496- SKU:
- M817496
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$11.64Qty in Cart: 0Quantity:Price:$11.64Subtotal: -
MOOSE RACING Ignition Cover Gasket 817504
MOOSE RACING
$6.88A leaking ignition cover gasket compromises engine sealing and can lead to oil weeping that accelerates wear on surrounding components. The MOOSE RACING Ignition Cover Gasket delivers OEM-grade durability at a fraction of the cost, giving you the...M817504- SKU:
- M817504
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
$6.88 -
MOOSE RACING Clutch Cover Gasket 817507
MOOSE RACING
$6.75A leaking clutch cover gasket compromises engine sealing and can lead to oil loss and contamination—a problem that demands an immediate, reliable solution. The MOOSE RACING Clutch Cover Gasket 817507 delivers OEM-equivalent sealing performance at a...M817507- SKU:
- M817507
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$6.75Qty in Cart: 0Quantity:Price:$6.75Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM 250SX/EXC 811300
MOOSE RACING
$90.04A complete engine and transmission rebuild demands precision components—and OEM gasket kits often come with premium pricing that leaves your budget depleted. The MOOSE RACING Motor Gasket Kit delivers full coverage at a fraction of OEM cost, so you can...09340104- SKU:
- 09340104
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$90.04 -
MOOSE RACING Motor Gasket Kit with Seal - KTM 65SX 811302
MOOSE RACING
$89.83A complete engine and transmission rebuild demands precision-fitted gaskets and seals—compromise here and you're risking oil leaks, contamination, and catastrophic failure down the line. The MOOSE RACING Motor Gasket Kit delivers OEM-quality seals at a...09340106- SKU:
- 09340106
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$89.83 -
MOOSE RACING Motor Gasket Kit with Seal - KTM 125SX/EXC 811303
MOOSE RACING
$90.04A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your KTM's performance or reliability. This Moose Racing kit eliminates the guesswork and expense of sourcing individual OEM components, giving you...09340107- SKU:
- 09340107
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$90.04 -
MOOSE RACING Motor Gasket Kit with Seal - KTM200SX 811308
MOOSE RACING
$98.45A complete engine and transmission rebuild demands precision components that won't compromise your build quality or strain your budget. This MOOSE RACING gasket and seal kit delivers OEM-equivalent performance at a fraction of the cost, giving you the...09340111- SKU:
- 09340111
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$98.45Qty in Cart: 0Quantity:Price:$98.45Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM125SX/EXC 811309
MOOSE RACING
$103.61A complete engine and transmission rebuild demands precision-fit gaskets and seals—compromising on quality here invites oil leaks, contamination, and premature failure. The MOOSE RACING Motor Gasket Kit eliminates the frustration of sourcing individual...09340112- SKU:
- 09340112
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$103.61 -
MOOSE RACING Motor Gasket Kit with Seal - KLR/DRZ110 811415
MOOSE RACING
$91.21A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. This MOOSE RACING kit eliminates the guesswork and expense of sourcing individual components, giving you everything needed for a reliable...09340113- SKU:
- 09340113
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$91.21 -
MOOSE RACING Motor Gasket Kit with Seal - KX125 811430
MOOSE RACING
$118.19A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or wallet. The MOOSE RACING Motor Gasket Kit delivers OEM-quality components at a fraction of OEM pricing, letting you rebuild with...09340114- SKU:
- 09340114
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$118.19 -
MOOSE RACING Top End Gasket Kit - TE-250SX/EXC 810327
MOOSE RACING
$32.09A 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 eliminates the guesswork with a complete, U.S.-manufactured set designed specifically for the...09341007- SKU:
- 09341007
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
$32.09Qty in Cart: 0Quantity:Price:$32.09Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM 811327
MOOSE RACING
$105.55A complete engine and transmission rebuild demands precision-fit gaskets and seals—factory tolerances won't accept substitutes. MOOSE Racing delivers OEM-equivalent components at a fraction of dealership pricing, letting you rebuild with confidence...09341008- SKU:
- 09341008
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$105.55 -
MOOSE RACING Complete Motor Gasket Kit - RMZ250 808568
MOOSE RACING
$129.09A complete engine rebuild demands gasket and seal integrity—any leak compromises performance and reliability. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a fraction of OEM pricing, giving you the confidence to rebuild...09341270- SKU:
- 09341270
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- UNITS:
- KIT
$129.09Qty in Cart: 0Quantity:Price:$129.09Subtotal: -
MOOSE RACING Top End Gasket Kit - KX125 810428
MOOSE RACING
$39.34When you're rebuilding a KX125 top end, using OEM-quality gaskets and seals isn't optional—it's essential. This Moose Racing kit gives you every gasket, O-ring, and seal you need for a complete rebuild at a fraction of OEM pricing, so you can confidently...09340864- SKU:
- 09340864
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$39.34Qty in Cart: 0Quantity:Price:$39.34Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM 811312
MOOSE RACING
$52.05A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or your budget. Moose Racing delivers OEM-specification components at a fraction of the cost, letting you rebuild with confidence without...09340865- SKU:
- 09340865
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$52.05Qty in Cart: 0Quantity:Price:$52.05Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM 811315
MOOSE RACING
$124.38A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. MOOSE RACING's OEM-spec gasket kit delivers genuine replacement seals and formed gaskets at a fraction of OEM pricing, so you can approach...09340866- SKU:
- 09340866
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$124.38 -
MOOSE RACING Top End Gasket Kit - KTM 85 810315
MOOSE RACING
$25.81When you're rebuilding a KTM 85 top end, you need gaskets and seals engineered for reliability—not bargain-bin parts that compromise your engine's integrity. This Moose Racing kit gives you everything required for a complete rebuild at a fraction of OEM...09340867- SKU:
- 09340867
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$25.81 -
MOOSE RACING Top End Gasket Kit - RM250 810569
MOOSE RACING
$39.34A top-end rebuild demands precision-fitted gaskets and seals that won't compromise compression or reliability. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of OEM pricing, ensuring your RM250 engine runs tight and...09340868- SKU:
- 09340868
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$39.34 -
MOOSE RACING Top End Gasket Kit - RMZ450 810590
MOOSE RACING
$78.88A 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 reassemble...09340870- SKU:
- 09340870
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$78.88
