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 Top End Gasket Kit - RMZ 450 810595
MOOSE RACING
$91.75A top-end rebuild demands precision—and OEM gasket sets come with OEM pricing. The MOOSE RACING Top End Gasket Kit delivers complete engine sealing at a fraction of the cost, with high-tech materials and genuine OEM oil seals engineered for durability...09341896- SKU:
- 09341896
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$91.75 -
MOOSE RACING Water Pump Rebuild Kit 821302
MOOSE RACING
$63.04A failing water pump compromises your engine's cooling efficiency and puts your entire drivetrain at risk. Rather than replacing the entire assembly, this MOOSE Racing rebuild kit lets you restore your water pump to OEM specifications with a complete set...09345192- SKU:
- 09345192
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$63.04 -
MOOSE RACING Water Pump Rebuild Kit 821312
MOOSE RACING
$56.37A failing water pump can compromise your engine's cooling efficiency and derail your race day or project timeline. This MOOSE RACING rebuild kit gives you everything needed to restore your water pump to OEM specifications without the cost and lead time...09345194- SKU:
- 09345194
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$56.37 -
MOOSE RACING Water Pump Rebuild Kit 821318
MOOSE RACING
$35.70A failing water pump can catastrophically compromise engine cooling and cost thousands in repairs. This MOOSE RACING rebuild kit lets you restore your water pump to OEM specifications with all gaskets, seals, and bearings in one package—eliminating the...09345196- SKU:
- 09345196
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$35.70 -
MOOSE RACING Water Pump Rebuild Kit 821319
MOOSE RACING
$46.30A failing water pump can leave you stranded mid-season, compromising engine cooling and risking catastrophic damage. The MOOSE RACING Water Pump Rebuild Kit 821319 gives you everything needed to restore your pump to OEM specifications without the cost of...09345197- SKU:
- 09345197
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$46.30 -
VESRAH Complete Gasket Kit - YZ 85 VG-2149
VESRAH
$46.57A complete engine rebuild demands precision gaskets that seal under extreme combustion pressures—compromised seals lead to oil leaks, lost compression, and catastrophic engine failure. The VESRAH Complete Gasket Kit VG-2149 delivers OEM-equivalent...09340963- SKU:
- 09340963
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
$46.57 -
MOOSE RACING Inner Clutch Cover Gasket 816350
MOOSE RACING
$19.17A failing clutch cover gasket leads to oil seepage, contaminated clutch surfaces, and potential engine damage—exactly why you need a precision replacement that seals reliably. The MOOSE RACING Inner Clutch Cover Gasket delivers OEM-equivalent performance...09346590- SKU:
- 09346590
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- EACH
- MOUNTING POSITION:
- INNER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$19.17Qty in Cart: 0Quantity:Price:$19.17Subtotal: -
MOOSE RACING Inner Clutch Cover Gasket 816672
MOOSE RACING
$16.90A leaking clutch cover gasket compromises engine sealing and invites oil contamination into your clutch assembly—exactly what your precision machinery doesn't need. This OEM-equivalent gasket from Moose Racing delivers reliable sealing without the...09346160- SKU:
- 09346160
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
$16.90Qty in Cart: 0Quantity:Price:$16.90Subtotal: -
MOOSE RACING Inner Clutch Cover Gasket 816752
MOOSE RACING
$24.68A leaking clutch cover gasket compromises engine sealing and invites oil contamination into your clutch system—exactly what you can't afford mid-race or mid-rebuild. The MOOSE RACING Inner Clutch Cover Gasket delivers OEM-equivalent sealing performance...09346167- SKU:
- 09346167
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$24.68 -
MOOSE RACING Inner Clutch Cover Gasket 816757
MOOSE RACING
$33.38A leaking clutch cover gasket compromises engine sealing and can lead to oil loss and contamination—exactly what you don't need mid-race or mid-project. The MOOSE RACING Inner Clutch Cover Gasket delivers OEM-equivalent reliability at a fraction of the...09346169- SKU:
- 09346169
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
$33.38 -
MOOSE RACING Exhaust Gasket Kit 823171
MOOSE RACING
$6.76A compromised exhaust seal is a silent performance killer—leaking combustion gases not only reduce horsepower but also introduce contaminants into your engine bay and compromise system reliability. The MOOSE RACING Exhaust Gasket Kit 823171 delivers...09346686- SKU:
- 09346686
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$6.76Qty in Cart: 0Quantity:Price:$6.76Subtotal: -
MOOSE RACING Exhaust Gasket Kit 823002
MOOSE RACING
$9.68A leaking exhaust system ruins performance and wastes horsepower before it ever leaves your engine. OEM gaskets deteriorate under heat cycles, causing exhaust leaks that compromise seal integrity and reduce efficiency. The MOOSE RACING Exhaust Gasket Kit...09345272- SKU:
- 09345272
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$9.68 -
MOOSE RACING Exhaust Gasket Kit 823170
MOOSE RACING
$6.76A quality exhaust gasket kit is essential for maintaining a reliable seal between your exhaust manifold and cylinder head—preventing exhaust leaks that rob horsepower and create unwanted noise. The MOOSE RACING Exhaust Gasket Kit 823170 delivers the...09345350- SKU:
- 09345350
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- EXHAUST
- UNITS:
- KIT
$6.76 -
MOOSE RACING Exhaust Gasket Kit 823176
MOOSE RACING
$21.48A quality exhaust gasket kit is essential for maintaining a proper seal between exhaust manifold and header joints, preventing costly exhaust leaks that compromise performance and increase emissions. Worn or deteriorated gaskets allow unmetered air to...09345351- SKU:
- 09345351
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$21.48 -
MOOSE RACING Exhaust Gasket Kit 823187
MOOSE RACING
$34.85Exhaust gasket degradation is one of the most common sources of power loss and unwanted emissions in high-performance engines. A failed or deteriorating gasket compromises seal integrity, allowing exhaust gases to escape before they reach your header or...09345352- SKU:
- 09345352
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$34.85 -
MOOSE RACING Complete Gasket Kit 808374
MOOSE RACING
$125.59A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't fail under sustained load. The MOOSE RACING Complete Gasket Kit 808374 delivers OEM-equivalent performance at a fraction of dealership pricing, giving you the...09345357- SKU:
- 09345357
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$125.59Qty in Cart: 0Quantity:Price:$125.59Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - KX450F 808485
MOOSE RACING
$175.37A complete engine and transmission rebuild demands precision-fitted gaskets and seals that won't compromise your work or your engine's longevity. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality sealing surfaces at a fraction of OEM...09345358- SKU:
- 09345358
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$175.37 -
MOOSE RACING Motor Gasket Kit with Seal - KDX/JR 811416
MOOSE RACING
$43.01A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—Moose Racing delivers OEM-quality components at a fraction of dealer pricing. This comprehensive kit eliminates the tedious sourcing of...09340485- SKU:
- 09340485
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$43.01 -
MOOSE RACING Top End Gasket Kit - RM125 810550
MOOSE RACING
$31.50When you're rebuilding an RM125 top end, every gasket and seal matters—a single leak or failure can compromise your entire engine. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals and gaskets at a fraction of OEM pricing, so you can...09340486- SKU:
- 09340486
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$31.50 -
MOOSE RACING Complete Motor Gasket Kit - RM125 808550
MOOSE RACING
$83.24A complete engine and transmission rebuild demands gaskets and seals that won't fail under load—and OEM replacements can devastate your budget. The MOOSE RACING Complete Motor Gasket Kit gives you factory-grade reliability at a fraction of dealership...09340487- SKU:
- 09340487
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$83.24
