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 Clutch Cover Gasket 817484
MOOSE RACING
$10.29A leaking clutch cover gasket compromises engine sealing and can lead to oil loss and contamination. The MOOSE RACING Clutch Cover Gasket (817484) is an OEM-equivalent replacement engineered with high-tech materials to deliver reliable sealing without...M817484- SKU:
- M817484
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- TYPE:
- CLUTCH COVER
$10.29 -
MOOSE RACING Motor Gasket Kit with Seal - CR250 811260
MOOSE RACING
$78.83A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your CR250's integrity. MOOSE Racing delivers OEM-equivalent quality at a fraction of the cost, letting you restore your engine with confidence instead...09340099- SKU:
- 09340099
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 0.25 MM
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$78.83 -
MOOSE RACING Motor Gasket Kit with Seal - KTM 125SX/EXC 811304
MOOSE RACING
$90.04A complete engine and transmission rebuild demands gaskets and seals that fit precisely and hold up under pressure—OEM parts carry premium pricing, but this MOOSE RACING kit delivers genuine-quality components at a fraction of the cost. Whether you're...09340108- SKU:
- 09340108
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$90.04 -
MOOSE RACING Motor Gasket Kit with Seal - KTM300SX/EXC 811306
MOOSE RACING
$96.69A complete engine and transmission rebuild demands precision-fit gaskets and seals—factory-quality components at a fraction of OEM pricing. This MOOSE RACING kit eliminates the hassle of sourcing individual seals and gaskets across multiple suppliers,...09340109- SKU:
- 09340109
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$96.69 -
MOOSE RACING Top End Gasket Kit - CR85R 810212
MOOSE RACING
$32.09A complete top-end rebuild demands precision components that won't compromise engine integrity or drain your budget. The MOOSE RACING Top End Gasket Kit eliminates the guesswork of sourcing individual seals and gaskets, delivering OEM-quality replacement...09340445- SKU:
- 09340445
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$32.09 -
MOOSE RACING Complete Motor Gasket Kit - CR85R 808212
MOOSE RACING
$58.40A complete engine rebuild demands precision gaskets and seals—and sourcing OEM-quality components shouldn't drain your budget. The MOOSE RACING Complete Motor Gasket Kit delivers genuine reliability at a fraction of OEM pricing, using high-tech materials...09340446- SKU:
- 09340446
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$58.40 -
MOOSE RACING Motor Gasket Kit with Seal - CR85R 811212
MOOSE RACING
$70.33A complete engine and transmission rebuild requires precision-fit gaskets and seals that won't compromise your work or wallet. MOOSE Racing delivers OEM-quality replacement seals at a fraction of factory pricing, so you can rebuild with confidence...09340447- SKU:
- 09340447
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$70.33 -
MOOSE RACING Top End Gasket Kit - CR125R 810239
MOOSE RACING
$48.17A top-end rebuild demands precision seals and gaskets that won't compromise engine integrity or bleed your budget. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of factory pricing, giving you the confidence to complete...09340448- SKU:
- 09340448
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$48.17 -
MOOSE RACING Motor Gasket Kit with Seal - CR125 811239
MOOSE RACING
$118.19A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work or your wallet. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent quality at a fraction of the cost, letting you rebuild with...09340450- SKU:
- 09340450
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$118.19 -
MOOSE RACING Top End Gasket Kit - CR125R 810243
MOOSE RACING
$49.60A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or your wallet. The MOOSE RACING Top End Gasket Kit gives you OEM-quality replacement seals and every gasket needed for a complete rebuild—all...09340451- SKU:
- 09340451
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$49.60 -
MOOSE RACING Motor Gasket Kit with Seal - CR125R 811243
MOOSE RACING
$119.57A complete engine and transmission rebuild demands precision seals and gaskets that match OEM specifications—and Moose Racing delivers exactly that at a fraction of genuine part costs. This comprehensive kit eliminates the guesswork of sourcing...09340453- SKU:
- 09340453
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$119.57 -
MOOSE RACING Motor Gasket Kit with Seal - KX85 811419
MOOSE RACING
$74.56A complete engine and transmission rebuild demands precision—mismatched or degraded gaskets and seals will compromise compression, invite oil leakage, and undermine your reliability on the track or trail. The MOOSE RACING Motor Gasket Kit eliminates the...09341264- SKU:
- 09341264
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$74.56 -
MOOSE RACING Clutch Cover Gasket 816198
MOOSE RACING
$22.96A leaking clutch cover gasket compromises engine sealing integrity and invites oil contamination into critical drivetrain components. The MOOSE RACING Clutch Cover Gasket 816198 delivers OEM-equivalent sealing performance at a fraction of OEM pricing,...09341265- SKU:
- 09341265
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$22.96Qty in Cart: 0Quantity:Price:$22.96Subtotal: -
MOOSE RACING Ignition Cover Gasket 816199
MOOSE RACING
$21.61A leaking ignition cover gasket compromises engine sealing and can lead to oil weeping that damages surrounding components. The MOOSE RACING 816199 delivers OEM-equivalent sealing performance at a fraction of the cost, making it the smart choice for...09341266- SKU:
- 09341266
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
$21.61Qty in Cart: 0Quantity:Price:$21.61Subtotal: -
MOOSE RACING Water Pump Rebuild Kit 821244
MOOSE RACING
$47.89A failing water pump can compromise your engine's thermal management and leave you stranded on track or trail. This complete MOOSE RACING rebuild kit supplies every seal, bearing, and gasket required to restore your water pump to factory specifications...09345183- SKU:
- 09345183
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$47.89 -
MOOSE RACING Clutch Cover Gasket 816079
MOOSE RACING
$12.38A failing clutch cover gasket compromises engine sealing and invites oil leakage that can damage adjacent components and reduce performance reliability. The MOOSE RACING Clutch Cover Gasket 816079 delivers OEM-equivalent sealing without the OEM price...09340564- SKU:
- 09340564
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$12.38 -
MOOSE RACING Complete Motor Gasket Kit - KTM 400/450 808317
MOOSE RACING
$140.21A complete engine rebuild demands precision gaskets and seals that won't compromise your work or fail under load. The MOOSE RACING Complete Motor Gasket Kit eliminates the frustration of sourcing individual components while delivering OEM-quality...09340622- SKU:
- 09340622
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$140.21 -
MOOSE RACING Complete Motor Gasket Kit - KTM 808318
MOOSE RACING
$172.14A complete engine and transmission rebuild demands precision gaskets and seals that won't fail under load. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a fraction of dealership pricing, giving you the confidence to...09340623- SKU:
- 09340623
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$172.14Qty in Cart: 0Quantity:Price:$172.14Subtotal: -
MOOSE RACING Top End Gasket Kit - KTM 810318
MOOSE RACING
$91.75A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity or performance. The MOOSE RACING Top End Gasket Kit eliminates the guesswork—every component you need is included and engineered to OEM specifications, so...09340628- SKU:
- 09340628
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$91.75Qty in Cart: 0Quantity:Price:$91.75Subtotal: -
MOOSE RACING Top End Gasket Kit - TTR/XT 810643
MOOSE RACING
$53.03A top-end rebuild demands precision-matched components—and OEM gasket kits carry premium pricing that doesn't reflect the actual material cost. The MOOSE RACING Top End Gasket Kit delivers genuine OEM-quality seals and U.S.-manufactured gaskets at a...09340629- SKU:
- 09340629
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$53.03
