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 Complete Gasket Kit - Sea-Doo 611210
WINDEROSA
$174.92A complete gasket failure can leave your Sea-Doo stranded and repair costs spiraling. The WINDEROSA Complete Gasket Kit delivers all the sealing surfaces your engine needs—from cylinder heads to crankshaft—ensuring a watertight assembly that holds...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
$142.28A reliable top-end gasket kit is essential for maintaining proper compression and preventing coolant or oil seepage that can compromise engine performance and longevity. The WINDEROSA 610210 delivers OEM-quality gasket materials engineered to withstand...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
$11.28A worn or deteriorated carb base gasket creates vacuum leaks that compromise fuel delivery, idle quality, and overall engine performance. This WINDEROSA gasket is engineered from compressed micropore material to deliver a reliable, long-lasting seal on...09342624- 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
$11.28Qty in Cart: 0Quantity:Price:$11.28Subtotal: -
WINDEROSA Carb Base Gasket - Keihin 40M 619128
WINDEROSA
$11.28A worn or degraded carb base gasket compromises fuel delivery precision and allows vacuum leaks that destabilize idle quality and throttle response. The WINDEROSA 619128 is engineered from compressed micropore material to deliver reliable, long-term...09342625- 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
$11.28 -
WINDEROSA Gasket - Top End - JS440 610102
WINDEROSA
$47.70A properly sealed top end is non-negotiable for reliable engine performance and longevity. This WINDEROSA gasket set eliminates the guesswork by providing OEM-quality sealing surfaces across all critical top-end interfaces, preventing oil weep, coolant...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
$235.47A leaking or compromised top-end gasket set will rob your GP1300 of power, reliability, and resale value. This WINDEROSA gasket set includes everything you need for a complete top-end rebuild—bases, heads, and the critical intake and exhaust gaskets...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
$47.90A blown or deteriorated gasket seal compromises compression, causes coolant and oil leaks, and tanks engine efficiency—costing you performance and reliability on the track or in the garage. The WINDEROSA Gasket Top End 610110 delivers a complete,...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
$57.09A properly sealed top end is non-negotiable for engine reliability and peak performance. The WINDEROSA Gasket Set for the 500 Jammer eliminates common leak points and maintains compression integrity across your entire top-end assembly. This U.S...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
$168.11A leaking top-end gasket set compromises sealing integrity and forces coolant and oil past critical junctures, leading to performance loss and potential engine damage. The WINDEROSA 610214 delivers comprehensive gasket coverage for your jet boat's top...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
$168.11A quality top-end gasket set is essential for maintaining compression integrity and preventing coolant or oil seepage in your 900 Ace engine. The WINDEROSA 610216 delivers OEM-grade sealing with a complete gasket package, eliminating the need for...09346549- SKU:
- 09346549
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- TOP END
$168.11Qty in Cart: 0Quantity:Price:$168.11Subtotal: -
WINDEROSA Gasket - Top End - JS800 610409
WINDEROSA
$104.45A top-end gasket set is essential maintenance for any JS800 engine—proper sealing prevents oil and coolant leaks while maintaining compression integrity across your cylinder head and intake/exhaust ports. WINDEROSA's U.S.-manufactured gasket set...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
$90.92When your engine takes a beating on the track or trail, worn cylinders compromise compression, power delivery, and reliability. The WINDEROSA Standard Bore Gasket Kit 810482 gives you a complete, ready-to-install cylinder solution without the downtime of...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
$127.08A reliable top-end gasket kit is essential for maintaining compression integrity and preventing coolant or oil seepage in high-performance engines. The WINDEROSA 610211 delivers OEM-quality sealing across critical contact points, ensuring your Sea-Doo...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: $221.97Engine gasket failure leads to oil leaks, coolant seepage, and internal combustion loss—all of which compromise performance and can cause catastrophic engine damage if left unaddressed. The WINDEROSA Complete Gasket Kit delivers factory-specification...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
$217.95A complete gasket failure can sideline your Sea-Doo and turn a weekend on the water into a costly nightmare. The WINDEROSA Complete Gasket Kit eliminates guesswork by providing every seal and gasket your 611215 engine needs in one package, ensuring...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
$73.37When your engine takes a hit, cylinder wear compromises compression, power delivery, and reliability. The WINDEROSA Standard Bore Gasket Kit 810689 restores your engine to factory specifications with a complete, matched component set that eliminates...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
$106.28When your engine's cylinder wear compromises compression and performance, a complete rebore kit saves you from costly machine work and extended downtime. The WINDEROSA Standard Bore Gasket Kit 810276 delivers a bolt-on cylinder solution with matched...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
$373.45A complete gasket set is critical for maintaining compression integrity and preventing fluid leaks across your engine's most vulnerable sealing points. The WINDEROSA Gasket - Complete for the JT1500 ensures reliable performance whether you're rebuilding...09346562- SKU:
- 09346562
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- ENGINE
$373.45Qty in Cart: 0Quantity:Price:$373.45Subtotal: -
WINDEROSA Gasket - Complete - JT1500 Ultra 611419
WINDEROSA
$398.33A complete gasket set is the foundation of engine reliability, sealing critical pressure points that prevent oil leaks, coolant loss, and combustion gas escape. For the JT1500 Ultra, this WINDEROSA gasket kit ensures your engine maintains proper...09346563- 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
$410.75A complete gasket set is the foundation of engine reliability—worn or damaged gaskets lead to compression loss, oil leaks, and catastrophic failure. The WINDEROSA Gasket Complete set eliminates guesswork by providing OEM-equivalent sealing surfaces...09346565- 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
