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
-
MOOSE RACING Motor Gasket Kit with Seal - KX125 811429
MOOSE RACING
$110.51A complete engine and transmission gasket rebuild doesn't require OEM pricing or compromised quality. This MOOSE Racing kit delivers genuine OEM-specification seals and precision gaskets for a fraction of dealer cost, letting you rebuild with confidence...M811429- SKU:
- M811429
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$110.51 -
MOOSE RACING Head Cover Gasket - KTM 817977
MOOSE RACING
$30.01OEM valve cover gaskets command premium pricing for a part that simply seals an engine cover. The MOOSE RACING Head Cover Gasket delivers genuine OEM-equivalent performance at a fraction of the cost, letting you rebuild your KTM engine or transmission...09345898- SKU:
- 09345898
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$30.01Qty in Cart: 0Quantity:Price:$30.01Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - KX65 808417
MOOSE RACING
$58.40A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise reliability or performance. This MOOSE RACING kit eliminates the hassle of sourcing individual components—you get every gasket, o-ring, and valve seal...09346100- SKU:
- 09346100
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$58.40 -
MOOSE RACING Complete Motor Gasket Kit - KTMHusqvarna 808998
MOOSE RACING
$125.59A complete engine and transmission rebuild requires precision gaskets that won't fail under pressure—and OEM replacements come with OEM pricing. The MOOSE RACING Complete Motor Gasket Kit delivers all the seals and gaskets you need to reassemble with...09346105- SKU:
- 09346105
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- PRODUCT NAME:
- GASKET
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
$125.59 -
MOOSE RACING Top End Gasket Kit - Honda 810277
MOOSE RACING
$89.47A top-end rebuild demands precision and reliability—the MOOSE RACING Gasket Kit eliminates guesswork by providing every gasket, seal, and O-ring your Honda engine needs in one complete package. Built from high-tech materials and manufactured to...09346108- SKU:
- 09346108
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$89.47 -
MOOSE RACING Head Cover Gasket - Husqvarna 819049
MOOSE RACING
$17.49A leaking head cover gasket compromises engine sealing and can lead to oil loss and contamination. The MOOSE RACING Head Cover Gasket delivers OEM-equivalent reliability at a fraction of the cost, allowing you to rebuild with confidence without the...09345904- SKU:
- 09345904
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
$17.49Qty in Cart: 0Quantity:Price:$17.49Subtotal: -
MOOSE RACING Clutch Cover Gasket 819054
MOOSE RACING
$13.64A leaking clutch cover gasket compromises both performance and engine longevity. The MOOSE RACING Clutch Cover Gasket 819054 delivers OEM-quality sealing at a fraction of OEM pricing, using high-tech materials engineered for reliability under racing...09345905- SKU:
- 09345905
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$13.64 -
MOOSE RACING Head Cover Gasket - Kawasaki 819057
MOOSE RACING
$43.80A leaking valve cover gasket compromises engine sealing and can lead to oil seepage that damages surrounding components. The OEM gasket carries a premium price tag, but this Moose Racing replacement delivers genuine durability at a fraction of the cost...09345906- SKU:
- 09345906
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
$43.80Qty in Cart: 0Quantity:Price:$43.80Subtotal: -
MOOSE RACING Clutch Cover Gasket 819064
MOOSE RACING
$9.53A leaking clutch cover gasket compromises both engine sealing and performance—allowing oil to escape and contaminants to enter your engine. The MOOSE RACING Clutch Cover Gasket 819064 delivers genuine OEM-quality sealing at a fraction of OEM pricing,...09345907- SKU:
- 09345907
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$9.53Qty in Cart: 0Quantity:Price:$9.53Subtotal: -
MOOSE RACING Water Pump Rebuild Kit 821374
MOOSE RACING
$57.57A failing water pump can strand you trackside or leave your engine running hot when you need reliability most. This MOOSE RACING rebuild kit gives you every seal, gasket, bearing, and component needed to restore your water pump to factory specifications...09345908- SKU:
- 09345908
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- STREET
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
$57.57 -
MOOSE RACING Top End Gasket Kit - KX80 810405
MOOSE RACING
$24.85A top-end rebuild demands precision gaskets and seals that won't compromise compression or durability. This Moose Racing kit eliminates the guesswork by including every gasket, O-ring, and seal you need to reassemble your KX80's cylinder head and...M810405- SKU:
- M810405
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$24.85Qty in Cart: 0Quantity:Price:$24.85Subtotal: -
MOOSE RACING Top End Gasket Kit - KX/RM 65 810412
MOOSE RACING
$27.24A 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 components at a fraction of OEM pricing, giving you the confidence to rebuild...M810412- SKU:
- M810412
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$27.24 -
MOOSE RACING Top End Gasket Kit - KX 85 810414
MOOSE RACING
$25.28A top-end rebuild demands precision gaskets and seals that won't compromise your engine's reliability or performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of the cost, letting you approach a piston replacement...M810414- SKU:
- M810414
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$25.28 -
MOOSE RACING Top End Gasket Kit - KX 125 810420
MOOSE RACING
$29.14When you're rebuilding a KX 125 top end, precision gasket selection directly impacts compression integrity and seal reliability. The MOOSE RACING Top End Gasket Kit eliminates the guesswork with a complete OEM-quality seal package manufactured right here...M810420- SKU:
- M810420
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$29.14 -
MOOSE RACING Top End Gasket Kit - KX 125 810423
MOOSE RACING
$42.36When you're rebuilding a KX 125 top end, gasket failure isn't an option—it compromises compression, causes oil weeping, and kills reliability. The MOOSE RACING Top End Gasket Kit gives you OEM-quality seals at a fraction of the cost, with every gasket,...M810423- SKU:
- M810423
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$42.36Qty in Cart: 0Quantity:Price:$42.36Subtotal: -
MOOSE RACING Top End Gasket Kit - KX 125 810424
MOOSE RACING
$39.34A top-end rebuild demands precision—and cutting corners on gaskets and seals will cost you power, reliability, and race day performance. The MOOSE RACING Top End Gasket Kit delivers OEM-quality sealing at a fraction of the price, with every component...M810424- SKU:
- M810424
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$39.34 -
MOOSE RACING Top End Gasket Kit - KX 125 810425
MOOSE RACING
$39.34A quality top-end gasket kit is essential for any engine rebuild—cheap seals lead to oil leaks, compression loss, and catastrophic failures. The MOOSE RACING Top End Gasket Kit delivers OEM-equivalent reliability at a fraction of the cost, with every...M810425- SKU:
- M810425
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$39.34 -
MOOSE RACING Motor Gasket Kit with Seal - KX/85 811414
MOOSE RACING
$74.56An engine or transmission rebuild demands precision and reliability—cutting corners on gaskets and seals invites oil leaks, compression loss, and catastrophic failure. The MOOSE RACING Motor Gasket Kit eliminates guesswork by supplying every seal and...M811414- SKU:
- M811414
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- UNITS:
- KIT
$74.56 -
MOOSE RACING Motor Gasket Kit with Seal - KDX200 811441
MOOSE RACING
$84.39A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your wallet. This Moose Racing kit eliminates the headache of sourcing individual components by bundling everything you need for a full...M811441- SKU:
- M811441
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
$84.39 -
MOOSE RACING Motor Gasket Kit with Seal - KDX220 811445
MOOSE RACING
$82.84A 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 eliminates guesswork with OEM-quality replacement seals and a comprehensive gasket set...M811445- SKU:
- M811445
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
$82.84
