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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WINDEROSA Gasket - Complete - Polaris 611809
WINDEROSA
$103.01A complete gasket set is critical to maintaining a proper seal throughout your engine's combustion chambers and fluid passages. When gaskets deteriorate or fail, you risk oil leaks, coolant seepage, and loss of compression—all of which compromise...09346567- SKU:
- 09346567
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- ENGINE
- UNITS:
- KIT
$103.01 -
WINDEROSA Gasket - Complete - Virage 700 611813
WINDEROSA
$90.12A complete gasket set is essential for any engine rebuild or overhaul, ensuring proper sealing across all critical combustion chamber and fluid passages. The WINDEROSA Gasket - Complete for Virage 700 engines delivers OEM-equivalent sealing performance...09346569- SKU:
- 09346569
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- ENGINE
$90.12 -
WINDEROSA Universal Gasket Sheet - 6 x 6 310101
WINDEROSA
$17.03A quality gasket sheet is non-negotiable for any serious engine builder or mechanic. WINDEROSA's universal gasket material gives you the flexibility to cut custom gaskets for virtually any application, eliminating costly downtime waiting for OEM...09346883- SKU:
- 09346883
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET MATERIAL
$17.03 -
WINDEROSA Universal Gasket - 8 x 8 310102
WINDEROSA
$29.80A quality gasket is foundational to reliable engine sealing—leaks compromise performance and invite catastrophic engine damage. WINDEROSA universal gaskets deliver consistent compression across critical sealing surfaces, giving you the peace of mind that...09346884- SKU:
- 09346884
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- GASKET MATERIAL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$29.80 -
WINDEROSA Universal Gasket Kit 310113
WINDEROSA
$30.80A blown gasket can sideline your engine faster than you'd expect, compromising compression and reliability when you need it most. The WINDEROSA Universal Gasket Kit 310113 delivers OEM-quality sealing across critical engine interfaces, eliminating leaks...09346885- SKU:
- 09346885
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$30.80 -
WINDEROSA Universal Gasket Kit - 12 x 18 310114
WINDEROSA
$32.08A reliable gasket kit is non-negotiable for any engine rebuild or top-end refresh. Engine sealing integrity directly impacts compression, prevents fluid leakage, and protects against contamination—all critical factors for consistent performance and...09346886- SKU:
- 09346886
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$32.08 -
WINDEROSA Universal Gasket - Exhaust 310115
WINDEROSA
$22.38A quality exhaust gasket is critical to maintaining a reliable seal between engine components and preventing exhaust leaks that compromise performance and increase emissions. The WINDEROSA Universal Gasket 310115 delivers consistent, long-lasting sealing...09346887- SKU:
- 09346887
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- GASKET MATERIAL
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$22.38 -
WINDEROSA Gasket Kit - Standard Bore 810372
WINDEROSA
$83.58A complete gasket kit is fundamental to engine reliability—it seals critical junctions between engine components to prevent fluid leakage and maintain compression integrity. The WINDEROSA Gasket Kit (810372) provides OEM-quality sealing surfaces across...09346008- SKU:
- 09346008
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BORE SIZE IMPERIAL:
- STANDARD
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CYLINDER
- UNITS:
- KIT
$83.58 -
WINDEROSA Standard Bore Gasket Kit 810670
WINDEROSA
$35.95When your engine demands a fresh start, a worn cylinder is no place to compromise. The WINDEROSA Standard Bore Gasket Kit delivers a complete, ready-to-install solution that restores OEM performance without the downtime of machine work or re-plating...09344049- SKU:
- 09344049
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- STYLE:
- STANDARD
- UNITS:
- KIT
- MATERIAL:
- NICKEL SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
$35.95 -
WINDEROSA Standard Bore Gasket Kit 810414
WINDEROSA
$25.87When your engine takes a beating on the track or trail, a worn cylinder demands replacement—not compromise. The WINDEROSA Standard Bore Gasket Kit delivers a complete, machine-ready solution that restores your engine to OEM specifications without the...09344053- SKU:
- 09344053
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- MATERIAL:
- NICKEL SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- STANDARD
$25.87 -
WINDEROSA Carb Base Gasket - Mikuni 38M 619123
WINDEROSA
$11.70A worn or degraded carb base gasket will compromise fuel atomization and create air leaks that destabilize your jetting and idle characteristics. This WINDEROSA replacement gasket for the Mikuni 38M restores a reliable seal, ensuring your carburetor...09342620- SKU:
- 09342620
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- WATERCRAFT
- STYLE:
- MIKUNI
- TYPE:
- CARBURETOR INTAKE
- BORE SIZE:
- 38,00 MM
- BORE SIZE METRIC:
- 38.00 MM
- MATERIAL:
- MICROPORE COMPOUND
- UNITS:
- 10 PACK
$11.70 -
WINDEROSA Carb Base Gasket - Mikuni 44M 619125
WINDEROSA
$11.28A deteriorating carb base gasket will compromise your fuel delivery and create costly air leaks that kill performance. This WINDEROSA gasket is engineered from compressed micropore material to deliver reliable, long-lasting sealing on Mikuni 44M...09342622- SKU:
- 09342622
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- WATERCRAFT
- STYLE:
- MIKUNI
- BORE SIZE:
- 44,00 MM
- BORE SIZE METRIC:
- 44.00 MM
- TYPE:
- CARBURETOR INTAKE
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- MICROPORE COMPOUND
$11.28 -
WINDEROSA Complete Gasket Kit - Kawasaki 650 611104
WINDEROSA
$96.30A complete engine gasket failure can sideline your Kawasaki 650 and drain your wallet fast. This WINDEROSA complete gasket kit eliminates the guesswork and multiple orders by delivering every seal you need in one package—bases, heads, intakes, and...PD810345- SKU:
- PD810345
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TYPE:
- COMPLETE
- RIDING STYLE:
- WATERCRAFT
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
$96.30 -
WINDEROSA Carb Base Gasket - Mikuni 46M 619126
WINDEROSA
$11.28A worn or degraded carb base gasket compromises fuel atomization and creates vacuum leaks that rob your engine of performance and reliability. The WINDEROSA 619126 is engineered from compressed micropore material to provide consistent, long-lasting...09342623- SKU:
- 09342623
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- BORE SIZE METRIC:
- 46.00 MM
- MATERIAL:
- MICROPORE COMPOUND
- TYPE:
- CARBURETOR INTAKE
- RIDING STYLE:
- WATERCRAFT
- STYLE:
- MIKUNI
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- BORE SIZE:
- 46,00 MM
$11.28 -
MOOSE RACING Complete Motor Gasket Kit without Seals - CRF250R 8110030
MOOSE RACING
$228.07A complete engine rebuild requires gaskets that match OEM specifications without the OEM price tag. This MOOSE RACING kit delivers every gasket and o-ring needed for a full engine and transmission teardown, letting you tackle the job with confidence...09346453- SKU:
- 09346453
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$228.07 -
MOOSE RACING Ignition Cover Gasket 816551
MOOSE RACING
$8.13A leaking ignition cover gasket compromises both engine performance and reliability—moisture and contaminants can infiltrate critical engine components. The MOOSE RACING Ignition Cover Gasket delivers OEM-quality sealing at a fraction of dealer pricing,...09346576- SKU:
- 09346576
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
$8.13 -
MOOSE RACING Ignition Cover Gasket 816758
MOOSE RACING
$13.64A failing ignition cover gasket compromises your engine's seal integrity, inviting oil leakage and potential internal damage during high-RPM operation. The MOOSE RACING 816758 delivers OEM-equivalent sealing performance with the reliability you need for...09346170- SKU:
- 09346170
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
$13.64 -
MOOSE RACING Top End Gasket Kit - KX 250 810457
MOOSE RACING
$45.89A top-end rebuild demands precision and reliability—corners cut here mean blown gaskets, oil weeps, and catastrophic engine failure. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals and gaskets at a fraction of dealer pricing, giving you...M810457- SKU:
- M810457
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$45.89 -
MOOSE RACING Complete Motor Gasket Kit - KTM/Husqvarna 8080027
MOOSE RACING
$110.43A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your build's integrity or your budget. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a fraction of the price, allowing...09346438- SKU:
- 09346438
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$110.43 -
MOOSE RACING Complete Motor Gasket Kit - Honda CRF250 8080030
MOOSE RACING
$204.56A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise reliability or performance. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork of sourcing individual components, giving you everything...09346439- SKU:
- 09346439
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$204.56
