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 Complete Gasket Kit - Sea-Doo 611210
WINDEROSA
$174.92Full engine gasket set includes bases, heads, intakes and crankshaft oil seals, Made in the U.S.A.09342184- SKU:
- 09342184
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- COMPLETE
$174.92 -
WINDEROSA Top End Gasket Kit - Sea-Doo 610210
WINDEROSA
$142.28Includes bases and heads, along with intake and exhaust gaskets (only those nearest the block), Made in the U.S.A.09342185- SKU:
- 09342185
- Availability:
- Ships Same Business Day
- Weight:
- 0.43 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
$142.28 -
WINDEROSA Carb Base Gasket - Keihin 38M 619127
WINDEROSA
$11.28Manufactured from compressed micropore material for ultimate sealing and durability, Replace worn or damaged base gaskets when doing a carb rebuild09342624- SKU:
- 09342624
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- CARBURETOR INTAKE
- BORE SIZE:
- 38,00 MM
- BORE SIZE METRIC:
- 38.00 MM
- MATERIAL:
- MICROPORE COMPOUND
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- RIDING STYLE:
- WATERCRAFT
- STYLE:
- KEIHIN
$11.28 -
WINDEROSA Carb Base Gasket - Keihin 40M 619128
WINDEROSA
$11.28Manufactured from compressed micropore material for ultimate sealing and durability, Replace worn or damaged base gaskets when doing a carb rebuild09342625- SKU:
- 09342625
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE:
- 40,00 MM
- PRODUCT NAME:
- GASKET
- TYPE:
- CARBURETOR INTAKE
- BORE SIZE METRIC:
- 40.00 MM
- RIDING STYLE:
- WATERCRAFT
- MATERIAL:
- MICROPORE COMPOUND
- STYLE:
- KEIHIN
- UNITS:
- 10 PACK
$11.28Qty in Cart: 0Quantity:Price:$11.28Subtotal: -
WINDEROSA Gasket - Top End - JS440 610102
WINDEROSA
$47.70Includes bases and heads, along with intake and exhaust gaskets (only those nearest the block), Made in the U.S.A.09346544- SKU:
- 09346544
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$47.70 -
WINDEROSA Gasket - Top End - GP1300 610107
WINDEROSA
$235.47Includes bases and heads, along with intake and exhaust gaskets (only those nearest the block), Made in the U.S.A.09346545- SKU:
- 09346545
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$235.47 -
WINDEROSA Gasket - Top End 610110
WINDEROSA
$47.90Includes bases and heads, along with intake and exhaust gaskets (only those nearest the block), Made in the U.S.A.09346546- SKU:
- 09346546
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
$47.90 -
WINDEROSA Gasket - Top End - 500 Jammer 610114
WINDEROSA
$57.09Includes bases and heads, along with intake and exhaust gaskets (only those nearest the block), Made in the U.S.A.09346547- SKU:
- 09346547
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
$57.09 -
WINDEROSA Gasket - Top End - Jet Boat 610214
WINDEROSA
$168.11Includes bases and heads, along with intake and exhaust gaskets (only those nearest the block), Made in the U.S.A.09346548- SKU:
- 09346548
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
$168.11 -
WINDEROSA Gasket - Top End - 900 Ace 610216
WINDEROSA
$168.11Includes bases and heads, along with intake and exhaust gaskets (only those nearest the block), Made in the U.S.A.09346549- SKU:
- 09346549
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
$168.11 -
WINDEROSA Gasket - Top End - JS800 610409
WINDEROSA
$104.45Includes bases and heads, along with intake and exhaust gaskets (only those nearest the block), Made in the U.S.A.09346551- SKU:
- 09346551
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
- UNITS:
- KIT
$104.45 -
WINDEROSA Standard Bore Gasket Kit 810482
WINDEROSA
$90.92Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise, Nickel Silicon Carbide plated for...09344055- SKU:
- 09344055
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- MATERIAL:
- NICKEL SILICON CARBIDE
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- STANDARD
$90.92Qty in Cart: 0Quantity:Price:$90.92Subtotal: -
WINDEROSA Top End Gasket Kit - Sea-Doo 610211
WINDEROSA
$127.08Includes bases and heads, along with intake and exhaust gaskets (only those nearest the block), Made in the U.S.A.09342615- SKU:
- 09342615
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
$127.08Qty in Cart: 0Quantity:Price:$127.08Subtotal: -
On Sale
WINDEROSA Complete Gasket Kit - Sea-Doo 611214
WINDEROSA
MSRP: $221.97Now: $142.00Was: $221.97Full engine gasket set includes bases, heads, intakes and crankshaft oil seals, Made in the U.S.A.09342617- SKU:
- 09342617
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- PRODUCT NAME:
- GASKET SET
- TYPE:
- COMPLETE
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
MSRP: $221.97Now: $142.00Was: $221.97 -
WINDEROSA Complete Gasket Kit - Sea-Doo 611215
WINDEROSA
$217.95Full engine gasket set includes bases, heads, intakes and crankshaft oil seals, Made in the U.S.A.09342618- SKU:
- 09342618
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- PRODUCT NAME:
- GASKET SET
- TYPE:
- COMPLETE
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- SET
$217.95 -
WINDEROSA Standard Bore Gasket Kit 810689
WINDEROSA
$73.37Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise, Nickel Silicon Carbide plated for...09342152- SKU:
- 09342152
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- NICKEL SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- STANDARD
$73.37 -
WINDEROSA Standard Bore Gasket Kit 810276
WINDEROSA
$106.28Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylinders, Cylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noise, Nickel Silicon Carbide plated for...09341934- SKU:
- 09341934
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- NICKEL SILICON CARBIDE
- STYLE:
- STANDARD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
$106.28 -
WINDEROSA Gasket - Complete - JT1500 611417
WINDEROSA
$373.45WINDEROSA Gasket - Complete - JT150009346562- SKU:
- 09346562
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- ENGINE
$373.45 -
WINDEROSA Gasket - Complete - JT1500 Ultra 611419
WINDEROSA
$398.33WINDEROSA Gasket - Complete - JT1500 Ultra09346563- SKU:
- 09346563
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- RIDING STYLE:
- WATERCRAFT
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
$398.33 -
WINDEROSA Gasket - Complete - Ultra 310 611421
WINDEROSA
$410.75WINDEROSA Gasket - Complete - Ultra 31009346565- SKU:
- 09346565
- Availability:
- Ships Same Business Day
- Weight:
- 1.36 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$410.75
