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 - YZ 426 F 810676
MOOSE RACING
$68.81When you're rebuilding a YZ 426F top end, precision gaskets and seals are non-negotiable—they're the difference between a reliable engine and a catastrophic failure. The MOOSE RACING Top End Gasket Kit eliminates guesswork by supplying every...M810676- SKU:
- M810676
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$68.81 -
MOOSE RACING Top End Gasket Kit - YZ/IT490 810680
MOOSE RACING
$21.90A top-end rebuild demands precision gasket selection—mismatched seals lead to leaks, compression loss, and catastrophic engine failure. The MOOSE RACING Top End Gasket Kit eliminates guesswork by providing every OEM-equivalent seal and gasket your...M810680- SKU:
- M810680
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$21.90 -
MOOSE RACING Top End Gasket Kit - YZ 490 810683
MOOSE RACING
$24.85A top-end rebuild demands precision and reliability—cheap gasket sets lead to oil leaks, compression loss, and costly engine damage. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals and gaskets at a fraction of the cost, so you can...M810683- SKU:
- M810683
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$24.85 -
MOOSE RACING Top End Gasket Kit - WR 500 810684
MOOSE RACING
$24.85A top-end rebuild demands precision—gasket failure can compromise compression, leak oil, and undo all your work. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals and gaskets at a fraction of the cost, engineered for accurate fit and...M810684- SKU:
- M810684
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$24.85Qty in Cart: 0Quantity:Price:$24.85Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - YZ85 811614
MOOSE RACING
$55.26A complete engine and transmission rebuild demands precision components that won't compromise performance or reliability. This MOOSE RACING gasket kit delivers genuine OEM-quality seals at a fraction of OEM pricing, giving you the confidence to handle a...M811614- SKU:
- M811614
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$55.26 -
MOOSE RACING Motor Gasket Kit with Seal - YZ125 811631
MOOSE RACING
$70.33A complete engine and transmission rebuild demands precision-fit gaskets and seals—factory tolerances won't accept substitutes. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent performance at a fraction of the cost, eliminating the guesswork and...M811631- SKU:
- M811631
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- TYPE:
- ENGINE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$70.33 -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811662
MOOSE RACING
$66.13A complete engine and transmission rebuild demands precision-fit gaskets and seals—any leak or misalignment compromises performance and reliability. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent components at a fraction of the cost, letting...M811662- SKU:
- M811662
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$66.13Qty in Cart: 0Quantity:Price:$66.13Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - YZ250 811670
MOOSE RACING
$71.82A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your budget. This Moose Racing Motor Gasket Kit delivers OEM-quality components at a fraction of dealership pricing, letting you rebuild...M811670- SKU:
- M811670
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$71.82 -
MOOSE RACING Top End Gasket Kit Honda 810989
MOOSE RACING
$77.45A top-end rebuild demands precision components that won't compromise engine integrity or drain your wallet. The MOOSE RACING Gasket Kit delivers OEM-equivalent sealing performance at a fraction of OEM pricing, letting you restore your Honda engine with...09345886- SKU:
- 09345886
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- UNITS:
- SET
$77.45 -
MOOSE RACING Top End Gasket - KTM/Husqvarna 810991
MOOSE RACING
$98.96A top-end rebuild demands precision—mismatched or worn gaskets will compromise compression, leak oil, and undermine all your other work. The MOOSE RACING Top End Gasket set eliminates guesswork by delivering every seal, O-ring, and gasket you need in one...09345887- SKU:
- 09345887
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- SET
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
$98.96 -
MOOSE RACING Motor Gasket Kit with Seal 811376
MOOSE RACING
$182.97A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or your wallet. The MOOSE RACING Motor Gasket Kit delivers OEM-quality components at a fraction of dealership pricing, giving you the...09345888- SKU:
- 09345888
- Availability:
- Ships Same Business Day
- Weight:
- 0.48 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
$182.97Qty in Cart: 0Quantity:Price:$182.97Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal 811984
MOOSE RACING
$198.99A complete engine and transmission rebuild requires gaskets and seals that match OEM specifications without the premium price tag. MOOSE RACING's Motor Gasket Kit delivers genuine OEM-quality seals and precision-formed gaskets for the entire drivetrain,...09345889- SKU:
- 09345889
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$198.99 -
MOOSE RACING Motor Gasket Kit with Seal 811989
MOOSE RACING
$210.06A complete engine and transmission rebuild demands precision-fit gaskets and seals—and OEM replacements often come with OEM pricing. The MOOSE RACING Motor Gasket Kit delivers genuine OEM-quality seals at a fraction of the cost, giving you the confidence...09345890- SKU:
- 09345890
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$210.06 -
MOOSE RACING Ignition Cover Gasket 816098
MOOSE RACING
$6.09A leaking ignition cover gasket compromises engine reliability and can lead to oil seepage that damages surrounding components. The MOOSE RACING Ignition Cover Gasket delivers OEM-quality sealing at a fraction of OEM pricing, giving you the confidence to...09345892- SKU:
- 09345892
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
$6.09 -
MOOSE RACING Ignition Cover Gasket 816295
MOOSE RACING
$13.64Ignition cover gaskets fail silently, often leaving you stranded with oil leaks that compromise engine integrity and performance. The MOOSE RACING 816295 delivers OEM-quality sealing at a fraction of dealership pricing, making it the smart choice for...09345893- SKU:
- 09345893
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
$13.64 -
MOOSE RACING Ignition Cover Gasket 816299
MOOSE RACING
$13.64A leaking ignition cover gasket compromises engine sealing and can lead to oil weeping that attracts dirt and debris into critical engine components. The MOOSE RACING Ignition Cover Gasket delivers OEM-quality sealing at a fraction of factory replacement...09345894- SKU:
- 09345894
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- ENGINE TYPE:
- 4-STROKE
$13.64 -
MOOSE RACING Ignition Cover Gasket 816317
MOOSE RACING
$13.64A leaking ignition cover gasket compromises engine sealing and can lead to oil contamination and performance loss. The MOOSE RACING 816317 delivers OEM-level fit and durability at a fraction of OEM pricing, making it the smart choice for engine rebuilds,...09345895- SKU:
- 09345895
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
$13.64 -
MOOSE RACING Ignition Cover Gasket 816749
MOOSE RACING
$11.24A leaking ignition cover gasket compromises engine sealing and can lead to oil seepage that damages surrounding components. The MOOSE RACING Ignition Cover Gasket (816749) delivers OEM-equivalent fitment and durability at a fraction of OEM pricing,...09345896- SKU:
- 09345896
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- IGNITION COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$11.24Qty in Cart: 0Quantity:Price:$11.24Subtotal: -
MOOSE RACING Ignition Cover Gasket 816755
MOOSE RACING
$14.83A leaking ignition cover gasket compromises engine sealing and can lead to oil contamination and performance loss. The MOOSE RACING Ignition Cover Gasket delivers OEM-quality sealing at a fraction of OEM pricing, making it an economical choice for both...09345897- SKU:
- 09345897
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- IGNITION COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
$14.83Qty in Cart: 0Quantity:Price:$14.83Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - KX250 808455
MOOSE RACING
$58.40A complete engine and transmission rebuild demands precision gasket sealing—any leak or premature failure compromises performance and reliability. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-grade quality at a fraction of OEM pricing,...M808455- SKU:
- M808455
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$58.40
