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 Ignition Cover Gasket 816702
MOOSE RACING
$11.24A leaking ignition cover gasket can compromise engine sealing and lead to costly oil seepage. MOOSE RACING's OEM-specification replacement gasket delivers the precision fit and durability you need to restore proper engine integrity without the premium...09341901- SKU:
- 09341901
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- IGNITION COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$11.24 -
MOOSE RACING Top End Gasket Kit - 50 SX 810337
MOOSE RACING
$30.94A top-end rebuild demands precision components that won't compromise reliability or break your budget. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals and gaskets at a fraction of manufacturer pricing, giving you the confidence to rebuild...09341904- SKU:
- 09341904
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
$30.94 -
MOOSE RACING Top End Gasket Kit - 65 XC/SX 810338
MOOSE RACING
$33.72A top-end rebuild demands precision—and cutting corners on gaskets and seals is how engines fail. The MOOSE RACING Top End Gasket Kit delivers OEM-quality sealing at a fraction of factory pricing, with every component engineered to handle repeated heat...09341906- SKU:
- 09341906
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$33.72 -
MOOSE RACING Water Pump Rebuild Kit 821212
MOOSE RACING
$56.29A failing water pump can compromise your entire cooling system, leading to catastrophic engine damage if left unaddressed. This MOOSE RACING rebuild kit supplies every gasket, seal, bearing, and snap ring needed to restore your water pump to OEM...09345178- SKU:
- 09345178
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$56.29 -
MOOSE RACING Motor Gasket Kit with Seal - 250SX/XC 811333
MOOSE RACING
$110.53A complete engine and transmission rebuild requires precision-fit gaskets and seals—factory-quality parts at a fraction of OEM pricing. This Moose Racing kit eliminates the frustration of sourcing individual components by bundling everything you need in...09341693- SKU:
- 09341693
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$110.53Qty in Cart: 0Quantity:Price:$110.53Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - 300XC/XCW 811335
MOOSE RACING
$96.69A complete engine and transmission rebuild demands precision-fit gaskets and seals—compromising here guarantees leaks, contamination, and costly downtime. The MOOSE RACING Motor Gasket Kit delivers OEM-quality seals at a fraction of OEM pricing, giving...09341695- SKU:
- 09341695
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- ENGINE
$96.69 -
MOOSE RACING Clutch Cover Gasket 816215
MOOSE RACING
$17.74A leaking clutch cover gasket compromises engine sealing and can lead to oil loss, contamination, and potential engine damage. The MOOSE RACING Clutch Cover Gasket 816215 delivers OEM-equivalent sealing performance at a fraction of OEM costs, using...09341452- SKU:
- 09341452
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
$17.74 -
MOOSE RACING Clutch Cover Gasket 816630
MOOSE RACING
$9.97A leaking clutch cover doesn't just waste oil—it compromises engine sealing integrity and creates mess on your garage floor. The MOOSE RACING Clutch Cover Gasket delivers OEM-equivalent sealing performance at a fraction of the cost, using high-tech...09341455- SKU:
- 09341455
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$9.97 -
MOOSE RACING Ignition Cover Gasket 816673
MOOSE RACING
$5.32A leaking ignition cover gasket compromises engine sealing and can lead to oil weeping that damages surrounding components. The MOOSE RACING Ignition Cover Gasket delivers OEM-level sealing performance at a fraction of dealership pricing, making it the...09341457- SKU:
- 09341457
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$5.32Qty in Cart: 0Quantity:Price:$5.32Subtotal: -
MOOSE RACING Top End Gasket Kit - Husqvarna/KTM 810364
MOOSE RACING
$86.00A top-end rebuild demands precision—and OEM gasket kits come with OEM pricing. The MOOSE RACING Top End Gasket Kit delivers every seal, O-ring, and gasket you need for a complete engine refresh at a fraction of the cost, using high-tech materials...09344770- SKU:
- 09344770
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$86.00 -
MOOSE RACING Motor Gasket Kit with Seal - 250SX/EXC 811324
MOOSE RACING
$94.32A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or force you back into the shop. MOOSE Racing delivers OEM-equivalent components at a fraction of dealership pricing, letting you rebuild...09340476- SKU:
- 09340476
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$94.32 -
MOOSE RACING Complete Motor Gasket Kit - 300SX/EXC 808326
MOOSE RACING
$73.01A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. The MOOSE RACING Complete Motor Gasket Kit eliminates the frustration of sourcing individual components while delivering OEM-quality...09340481- SKU:
- 09340481
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$73.01 -
MOOSE RACING Top End Gasket Kit - KDX/JR50 810416
MOOSE RACING
$18.57A quality gasket kit is essential when rebuilding your KDX or JR50 top end—compromised seals lead to oil leaks, compression loss, and premature engine wear. The MOOSE RACING Top End Gasket Kit delivers OEM-equivalent reliability at a fraction of the...09340483- SKU:
- 09340483
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
$18.57Qty in Cart: 0Quantity:Price:$18.57Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - YZ125 808641
MOOSE RACING
$55.47A complete engine rebuild demands precision gaskets and seals that won't fail under race conditions. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork and expense of sourcing individual components—everything you need for YZ125 engine...09340492- SKU:
- 09340492
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$55.47 -
MOOSE RACING Motor Gasket Kit with Seal - YZ125 811641
MOOSE RACING
$69.07A complete engine and transmission rebuild demands gasket and seal quality you can trust—and OEM pricing that doesn't drain your budget. The MOOSE RACING Motor Gasket Kit delivers genuine OEM-spec seals paired with US-manufactured gaskets, so you can...09340493- SKU:
- 09340493
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$69.07 -
MOOSE RACING Complete Motor Gasket Kit without Seals - YZ85 8110026
MOOSE RACING
$98.45A complete engine and transmission rebuild demands gasket and seal integrity—any compromise risks catastrophic failure. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-equivalent reliability at a fraction of the cost, using high-tech materials...09346449- SKU:
- 09346449
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$98.45 -
MOOSE RACING Complete Motor Gasket Kit without Seals - KX450 8110027
MOOSE RACING
$221.09A complete engine rebuild demands precision gaskets that match OEM specifications without the premium price tag. This Moose Racing kit delivers comprehensive gasket coverage for both engine and transmission, allowing you to refresh sealing surfaces with...09346450- SKU:
- 09346450
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
$221.09 -
MOOSE RACING Complete Motor Gasket Kit - KX/RM65 808412
MOOSE RACING
$45.27A complete engine and transmission rebuild demands gasket and seal integrity—any compromise risks catastrophic failure and wasted labor. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality replacement seals and gaskets at a fraction of...M808412- SKU:
- M808412
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$45.27 -
MOOSE RACING Top End Gasket Kit - CRF450X 810276
MOOSE RACING
$103.88A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity—this Moose Racing kit delivers OEM-quality components at a fraction of factory pricing. Whether you're replacing worn seals during routine maintenance or...09340968- SKU:
- 09340968
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
$103.88 -
MOOSE RACING Complete Gasket Set - Suzuki 808590
MOOSE RACING
$109.72A complete gasket set is essential for maintaining proper engine sealing and preventing fluid leaks across critical engine surfaces. Whether you're rebuilding after a top-end refresh or performing routine engine maintenance, MOOSE RACING's...09346949- SKU:
- 09346949
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- SET
$109.72
