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 Complete Gasket and Oil Seal Kit 811372
MOOSE RACING
$191.24A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or force you to source components piecemeal. This kit eliminates guesswork by supplying all OEM-equivalent gaskets and oil seals in one...09345368- SKU:
- 09345368
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$191.24 -
MOOSE RACING Top End Gasket Kit - YZ 250 810663
MOOSE RACING
$27.72A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or cost you a fortune. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals and a complete set of gaskets—all manufactured in the U.S.A.—at a fraction...M810663- SKU:
- M810663
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$27.72 -
MOOSE RACING Top End Gasket Kit - YZ 250 810664
MOOSE RACING
$21.90A top-end rebuild demands precision—gaskets that seal tight, materials that last, and the confidence that every component fits exactly as engineered. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals at a fraction of the cost, letting you...M810664- SKU:
- M810664
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$21.90 -
MOOSE RACING Top End Gasket Kit - YZ 250 810665
MOOSE RACING
$29.14A top-end rebuild demands precision seals and gaskets that won't compromise your engine's integrity or performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality replacement seals at a fraction of the cost, allowing you to approach your YZ 250...M810665- SKU:
- M810665
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$29.14 -
MOOSE RACING Top End Gasket Kit - YZ 250 810666
MOOSE RACING
$36.47A top-end rebuild demands precision—every gasket, seal, and O-ring must fit perfectly to maintain compression, prevent leaks, and deliver consistent performance. The MOOSE RACING Top End Gasket Kit gives you OEM-quality seals at a fraction of the cost,...M810666- SKU:
- M810666
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$36.47 -
MOOSE RACING Top End Gasket Kit - YZ 250 810668
MOOSE RACING
$36.47When you're rebuilding a YZ 250 top end, gasket and seal integrity directly impacts compression, oil containment, and overall engine reliability. The MOOSE RACING Top End Gasket Kit eliminates the guesswork with a complete, U.S.-manufactured solution...M810668- SKU:
- M810668
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$36.47 -
MOOSE RACING Top End Gasket Kit - YZ 250 810670
MOOSE RACING
$35.14A top-end rebuild demands precision—using OEM-quality seals and gaskets ensures your YZ 250 runs reliably without the premium OEM price tag. This complete kit eliminates the guesswork of sourcing individual components, giving you confidence that every...M810670- SKU:
- M810670
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$35.14 -
MOOSE RACING Motor Gasket Kit with Seal - 600 Grizzly 811833
MOOSE RACING
$178.30A complete engine and transmission rebuild demands precision-fit gaskets and seals—compromising on these components invites leaks, contamination, and catastrophic failure. The MOOSE RACING Motor Gasket Kit eliminates guesswork by bundling every gasket...M811833- SKU:
- M811833
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- TYPE:
- COMPLETE
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$178.30 -
MOOSE RACING Motor Gasket Kit with Seal - LT250R 811834
MOOSE RACING
$50.74A complete engine and transmission rebuild demands precision gaskets and seals that fit right the first time—cutting corners here compromises both performance and reliability. The MOOSE RACING Motor Gasket Kit delivers OEM-quality seals at a fraction of...M811834- SKU:
- M811834
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
$50.74 -
MOOSE RACING Motor Gasket Kit with Seal - LT500R 811835
MOOSE RACING
$80.18A complete engine and transmission rebuild demands precision-fit gaskets and seals—cheap replacements lead to leaks, lost compression, and catastrophic failure. The MOOSE RACING Motor Gasket Kit eliminates guesswork with OEM-quality components engineered...M811835- SKU:
- M811835
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
$80.18 -
MOOSE RACING Motor Gasket Kit with Seal - Trail Boss/Magnum 811836
MOOSE RACING
$100.84A complete engine and transmission rebuild requires precision-fit gaskets and seals that won't compromise your work or your budget. This MOOSE RACING kit eliminates the guesswork of sourcing individual components by bundling everything you need in one...M811836- SKU:
- M811836
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
$100.84Qty in Cart: 0Quantity:Price:$100.84Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - DS650 811853
MOOSE RACING
$156.18A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your budget. MOOSE Racing delivers OEM-equivalent quality at a fraction of dealership pricing, so you can confidently refresh your entire...M811853- SKU:
- M811853
- Availability:
- Ships Same Business Day
- Weight:
- 0.43 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ATV
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$156.18 -
MOOSE RACING Inner Clutch Cover Gasket 816020
MOOSE RACING
$14.33A failing clutch cover gasket can compromise your engine's oil containment and lead to costly sealing failures during critical race conditions. The MOOSE RACING Inner Clutch Cover Gasket delivers OEM-equivalent reliability at a fraction of OEM pricing,...09346116- SKU:
- 09346116
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$14.33 -
MOOSE RACING Inner Clutch Cover Gasket 816027
MOOSE RACING
$13.18A leaking clutch cover gasket compromises both engine integrity and performance reliability. The MOOSE RACING Inner Clutch Cover Gasket (816027) delivers OEM-equivalent sealing in a cost-effective package, using high-tech materials engineered for...09346117- SKU:
- 09346117
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- TYPE:
- CLUTCH COVER
$13.18 -
MOOSE RACING Inner Clutch Cover Gasket 816039
MOOSE RACING
$16.40A leaking inner clutch cover gasket compromises engine sealing and invites oil contamination into critical drivetrain components. MOOSE Racing's OEM-equivalent gasket delivers precise fitment and reliable sealing without the premium price tag of genuine...09346118- SKU:
- 09346118
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$16.40 -
MOOSE RACING Inner Clutch Cover Gasket 816068
MOOSE RACING
$13.91A leaking clutch cover gasket will compromise oil containment and create a mess in your engine bay—exactly what you don't need during a rebuild or mid-season maintenance. The MOOSE RACING Inner Clutch Cover Gasket 816068 delivers genuine OEM-quality...09346119- SKU:
- 09346119
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
$13.91 -
MOOSE RACING Inner Clutch Cover Gasket 816084
MOOSE RACING
$13.64A leaking clutch cover doesn't just waste oil—it compromises engine sealing integrity and invites contamination into your drivetrain. The MOOSE RACING Inner Clutch Cover Gasket (816084) delivers a precision fit that stops seepage at the source, using...09346120- SKU:
- 09346120
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$13.64 -
MOOSE RACING Top End Gasket Kit - XR100 810221
MOOSE RACING
$24.85A top-end rebuild demands precision and reliability—this Moose Racing gasket kit delivers both at a fraction of OEM pricing. Whether you're replacing a worn piston or performing routine maintenance, you get every seal, gasket, and O-ring needed for a...M810221- SKU:
- M810221
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$24.85 -
MOOSE RACING Top End Gasket Kit - CR125R 810231
MOOSE RACING
$39.34A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity—and Moose Racing delivers OEM-quality components at a fraction of OEM pricing. This complete gasket kit includes everything needed for a full top-end...M810231- SKU:
- M810231
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$39.34Qty in Cart: 0Quantity:Price:$39.34Subtotal: -
MOOSE RACING Top End Gasket Kit - CR125R 810232
MOOSE RACING
$23.33A top-end rebuild demands precision gaskets and seals that won't fail under race conditions or repeated heat cycles. This Moose Racing kit eliminates the guesswork by including every component you need—valve seals, head gasket, base gasket, exhaust...M810232- SKU:
- M810232
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$23.33
