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 Valve Cover Gasket - Kawasaki 817917
MOOSE RACING
$26.92A leaking valve cover gasket compromises engine sealing integrity and can lead to oil seepage that damages surrounding components. MOOSE RACING's OEM-quality gasket restores proper compression and prevents costly oil leaks on your Kawasaki engine. This...09346899- SKU:
- 09346899
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- TYPE:
- VALVE COVER
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$26.92 -
MOOSE RACING Complete Motor Gasket Kit - RMZ450/RMX450 808595
MOOSE RACING
$150.60A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or wallet. This MOOSE Racing kit gives you every gasket, O-ring, and valve seal needed for a full rebuild at a fraction of OEM pricing. Built...09341897- SKU:
- 09341897
- Availability:
- Ships Same Business Day
- Weight:
- 0.59 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$150.60 -
MOOSE RACING Motor Gasket Kit with Seal - RMZ450 811595
MOOSE RACING
$183.26A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work—or your wallet. The MOOSE RACING Motor Gasket Kit delivers OEM-quality replacement seals at a fraction of manufacturer pricing, letting you...09341898- SKU:
- 09341898
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$183.26 -
MOOSE RACING Ignition Cover Gasket 816693
MOOSE RACING
$8.29A leaking ignition cover gasket compromises engine sealing and can lead to oil weeping that accelerates wear on surrounding components. The MOOSE RACING Ignition Cover Gasket delivers OEM-equivalent fitment and durability at a fraction of OEM pricing,...09341899- SKU:
- 09341899
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- TYPE:
- IGNITION COVER
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$8.29 -
MOOSE RACING Clutch Cover Gasket 816701
MOOSE RACING
$12.14A leaking clutch cover gasket can compromise engine integrity and lead to costly oil seepage issues. The MOOSE RACING Clutch Cover Gasket 816701 delivers OEM-equivalent sealing performance at a fraction of the cost, using high-tech materials engineered...09341900- SKU:
- 09341900
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$12.14 -
MOOSE RACING Top End Gasket Kit - RMZ250 810568
MOOSE RACING
$74.59A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or wallet. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of OEM pricing, so you can confidently reassemble your RMZ250...09341269- SKU:
- 09341269
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$74.59 -
MOOSE RACING Complete Motor Gasket Kit - YZ250 808669
MOOSE RACING
$61.34A complete engine and transmission rebuild demands gasket and seal integrity—any compromise leads to oil leaks, contamination, and catastrophic failure. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality replacement seals and gaskets at a...09341517- SKU:
- 09341517
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$61.34 -
MOOSE RACING Ignition Cover Gasket 816677
MOOSE RACING
$11.22A leaking ignition cover gasket compromises engine sealing and invites oil contamination into critical systems. MOOSE RACING's OEM-equivalent gasket delivers the precise fit and durability you need to restore a proper seal at a fraction of OEM pricing...09341459- SKU:
- 09341459
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
$11.22 -
MOOSE RACING Inner Clutch Cover Gasket 816174
MOOSE RACING
$13.80A leaking clutch cover gasket compromises engine oil retention and creates messy drips on your shop floor. The MOOSE RACING Inner Clutch Cover Gasket delivers OEM-equivalent sealing performance at a fraction of the cost, using high-tech materials...09346125- SKU:
- 09346125
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$13.80 -
MOOSE RACING Inner Clutch Cover Gasket 816234
MOOSE RACING
$15.59A leaking clutch cover gasket compromises engine integrity and invites oil seepage that can damage surrounding components. The MOOSE RACING Inner Clutch Cover Gasket (816234) delivers OEM-equivalent sealing performance at a fraction of factory pricing,...09346128- SKU:
- 09346128
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$15.59 -
MOOSE RACING Inner Clutch Cover Gasket 816238
MOOSE RACING
$17.74A leaking clutch cover gasket compromises engine sealing integrity and can lead to oil contamination and transmission issues. The MOOSE RACING Inner Clutch Cover Gasket delivers OEM-equivalent sealing performance at a fraction of OEM pricing, making it...09346129- SKU:
- 09346129
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$17.74 -
MOOSE RACING Inner Clutch Cover Gasket 816250
MOOSE RACING
$16.37A leaking clutch cover gasket compromises both engine performance and reliability—allowing oil seepage that can damage adjacent components and create messy maintenance headaches. The MOOSE RACING Inner Clutch Cover Gasket delivers OEM-equivalent sealing...09346130- SKU:
- 09346130
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$16.37 -
MOOSE RACING Inner Clutch Cover Gasket 816255
MOOSE RACING
$13.91A leaking clutch cover gasket compromises engine reliability and can lead to costly oil seepage issues. The MOOSE RACING Inner Clutch Cover Gasket delivers OEM-equivalent sealing performance at a fraction of OEM pricing, making it an essential...09346132- SKU:
- 09346132
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$13.91 -
MOOSE RACING Inner Clutch Cover Gasket 816256
MOOSE RACING
$16.73A leaking clutch cover doesn't just cost you oil—it costs you reliability and peace of mind on track or trail. The MOOSE RACING Inner Clutch Cover Gasket (816256) is a genuine OEM replacement engineered to seal tight and last, eliminating the guesswork...09346133- SKU:
- 09346133
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
$16.73 -
MOOSE RACING Inner Clutch Cover Gasket 816263
MOOSE RACING
$16.90A leaking clutch cover gasket compromises both performance and engine longevity—oil seepage leads to contamination, slipped clutches, and costly secondary damage. The MOOSE RACING Inner Clutch Cover Gasket delivers OEM-equivalent sealing without the...09346134- SKU:
- 09346134
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
$16.90 -
MOOSE RACING Clutch Cover Gasket 817841
MOOSE RACING
$15.26A leaking clutch cover gasket compromises engine integrity and leads to costly oil seepage. The MOOSE RACING Clutch Cover Gasket delivers OEM-equivalent sealing performance at a fraction of OEM pricing, using high-tech materials engineered for durability...09341461- SKU:
- 09341461
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$15.26 -
MOOSE RACING Head Cover Gasket - CRF250 817844
MOOSE RACING
$19.21Head cover gaskets fail silently—a small leak turns into catastrophic oil loss and engine damage if left unchecked. OEM gaskets carry premium pricing that doesn't reflect the material or engineering involved, making Moose Racing's U.S.-manufactured...09341462- SKU:
- 09341462
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$19.21 -
MOOSE RACING Head Cover Gasket - CRF450 817845
MOOSE RACING
$16.77A leaking head cover gasket compromises engine sealing and can lead to oil seepage that damages adjacent components. Moose Racing delivers OEM-equivalent gasket performance at a fraction of the cost, allowing you to rebuild with confidence without the...09341463- SKU:
- 09341463
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
$16.77 -
MOOSE RACING Head Cover Gasket - KXF/RMZ 817846
MOOSE RACING
$24.96Engine valve cover gaskets wear out and fail—when they do, oil seeps into areas it shouldn't, compromising seal integrity and potentially damaging other components. The MOOSE RACING Head Cover Gasket delivers OEM-equivalent sealing performance at a...09341464- SKU:
- 09341464
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$24.96 -
MOOSE RACING Head Cover Gasket - RMZ450 817847
MOOSE RACING
$25.40Engine oil seepage around the valve cover is a clear sign your head gasket has lost its seal. OEM replacements carry a premium price tag, but Moose Racing delivers genuine-quality gasket performance at a fraction of the cost. This U.S.-manufactured...09341465- SKU:
- 09341465
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- MATERIAL:
- RUBBER
- TYPE:
- HEAD COVER
$25.40
