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
-
WINDEROSA Gasket - Complete - Yamaha 611605
WINDEROSA
$103.88A complete gasket set is the foundation of a reliable engine rebuild or top-end refresh. WINDEROSA gaskets are precision-engineered to OEM specifications, ensuring proper sealing across all critical...09346566- SKU:
- 09346566
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
$103.88Qty in Cart: 0Quantity:Price:$103.88Subtotal: -
WINDEROSA Gasket - Complete - Polaris 611809
WINDEROSA
$74.25A 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,...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
$74.25 -
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...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
$17.88A 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...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
$17.88 -
WINDEROSA Universal Gasket - 8 x 8 310102
WINDEROSA
$31.29A quality gasket is foundational to reliable engine sealing—leaks compromise performance and invite catastrophic engine damage. WINDEROSA universal gaskets deliver consistent compression across...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
$31.29 -
WINDEROSA Universal Gasket Kit 310113
WINDEROSA
$32.34A 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...09346885- SKU:
- 09346885
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$32.34 -
WINDEROSA Universal Gasket Kit - 12 x 18 310114
WINDEROSA
$33.68A 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...09346886- SKU:
- 09346886
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$33.68 -
WINDEROSA Universal Gasket - Exhaust 310115
WINDEROSA
$23.50A 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...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
$23.50 -
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...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...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...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...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
$11.70Qty in Cart: 0Quantity:Price:$11.70Subtotal: -
WINDEROSA Carb Base Gasket - Mikuni 40M 619124
WINDEROSA
$11.84A compromised carb base gasket will undermine fuel delivery precision and create vacuum leaks that rob your engine of performance. WINDEROSA's compressed micropore material resists fuel degradation...09342621- SKU:
- 09342621
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- WATERCRAFT
- STYLE:
- MIKUNI
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- BORE SIZE:
- 40,00 MM
- TYPE:
- CARBURETOR INTAKE
- BORE SIZE METRIC:
- 40.00 MM
- MATERIAL:
- MICROPORE COMPOUND
$11.84 -
WINDEROSA Carb Base Gasket - Mikuni 44M 619125
WINDEROSA
$11.84A 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...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
$11.84 -
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...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
$11.84A 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...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
$11.84 -
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...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...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...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...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
