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 Water Pump Rebuild Kit 821689
MOOSE RACING
$43.33A failing water pump can rapidly escalate into catastrophic engine damage, making preventative maintenance non-negotiable for any serious racer or performance enthusiast. This comprehensive MOOSE RACING rebuild kit delivers every seal, bearing, and...09345266- SKU:
- 09345266
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$43.33 -
MOOSE RACING Water Pump Rebuild Kit 821690
MOOSE RACING
$38.92A failing water pump can sideline your engine without warning, compromising cooling efficiency and risking catastrophic damage. This MOOSE RACING rebuild kit delivers every component needed to restore your water pump to OEM specifications—bearings,...09345267- SKU:
- 09345267
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- REPAIR KIT
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$38.92 -
MOOSE RACING Water Pump Rebuild Kit 821692
MOOSE RACING
$55.21A failing water pump can quickly compromise engine cooling and lead to catastrophic damage, making a complete rebuild kit essential for maintaining reliable operation. Rather than replacing the entire assembly, this comprehensive rebuild kit gives you...09345268- SKU:
- 09345268
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$55.21 -
MOOSE RACING Water Pump Rebuild Kit 821976
MOOSE RACING
$37.02A failing water pump can sideline your engine faster than you'd expect, compromising cooling efficiency and risking catastrophic overheating. Rather than replace the entire assembly, this MOOSE RACING rebuild kit gives you a cost-effective path to...09345270- SKU:
- 09345270
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$37.02 -
MOOSE RACING Exhaust Gasket Kit 823001
MOOSE RACING
$9.53A proper exhaust seal is fundamental to maintaining peak engine performance and preventing costly exhaust leaks that compromise horsepower and fuel efficiency. The MOOSE RACING Exhaust Gasket Kit 823001 delivers OEM-quality gaskets engineered to...09345271- SKU:
- 09345271
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- EXHAUST
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
$9.53 -
MOOSE RACING Complete Motor Gasket Kit - KTM/Husqvarna 808976
MOOSE RACING
$126.73A complete engine and transmission rebuild demands precision gaskets and seals that won't fail under load—this kit delivers OEM-quality components at a fraction of dealership pricing. Whether you're refreshing a top-end or doing a full bottom-end...09345359- SKU:
- 09345359
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$126.73 -
MOOSE RACING Top End Gasket Kit - CRF450 810284
MOOSE RACING
$103.88A top-end rebuild demands precision-fit gaskets and seals that won't compromise combustion integrity or oil containment. The MOOSE RACING Top End Gasket Kit eliminates the guesswork and expense of sourcing individual OEM components, giving you every seal...09341887- SKU:
- 09341887
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$103.88 -
MOOSE RACING Complete Motor Gasket Kit - CRF450 808284
MOOSE RACING
$176.41A complete engine and transmission rebuild requires precision-fit gaskets and seals that won't compromise your work. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality components at a fraction of the cost, eliminating the guesswork of...09341888- SKU:
- 09341888
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$176.41 -
MOOSE RACING Motor Gasket Kit with Seal - CRF450 811284
MOOSE RACING
$221.09A complete engine and transmission rebuild demands precision-fit gaskets and seals—anything less risks oil leakage, compression loss, and costly downtime. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent sealing performance at a fraction of OEM...09341889- SKU:
- 09341889
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$221.09 -
MOOSE RACING Top End Gasket Kit - KX250F 810481
MOOSE RACING
$90.07A top-end rebuild demands precision gaskets and seals that won't compromise your engine's integrity—especially when you're pushing performance limits. This Moose Racing kit delivers OEM-quality components at a fraction of the cost, giving you the...09341890- SKU:
- 09341890
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- TOP END
$90.07 -
MOOSE RACING Complete Motor Gasket Kit - KX250F 808481
MOOSE RACING
$140.62A complete engine and transmission rebuild demands precision-fit gaskets and seals—factory tolerances won't tolerate improvisation. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork by bundling every gasket, O-ring, and valve seal...09341891- SKU:
- 09341891
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$140.62 -
MOOSE RACING Motor Gasket Kit with Seal - KX250F 811481
MOOSE RACING
$193.69A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or your wallet. MOOSE Racing delivers OEM-quality replacement seals at a fraction of dealer pricing, letting you rebuild with confidence...09341892- SKU:
- 09341892
- Availability:
- Ships Same Business Day
- Weight:
- 0.43 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$193.69 -
MOOSE RACING Top End Gasket Kit - KX450F 810482
MOOSE RACING
$88.86When you're rebuilding a KX450F top end, gasket quality directly impacts ring seal, combustion chamber integrity, and overall engine longevity. The MOOSE RACING Top End Gasket Kit eliminates the guesswork with a complete, domestically-manufactured set...09341893- SKU:
- 09341893
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$88.86 -
MOOSE RACING Complete Motor Gasket Kit - KX450F 808482
MOOSE RACING
$172.14A complete engine and transmission rebuild demands gasket and seal components that match OEM specifications without the OEM price tag. This Moose Racing kit eliminates the guesswork of sourcing individual gaskets, o-rings, and valve seals—everything you...09341894- SKU:
- 09341894
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$172.14 -
MOOSE RACING Motor Gasket Kit with Seal - KX450F 811482
MOOSE RACING
$196.71A complete engine and transmission rebuild demands precision-fit gaskets and seals—any compromise on fitment risks oil leaks, compression loss, and catastrophic failure. This Moose Racing kit eliminates the guesswork by providing OEM-equivalent seals and...09341895- SKU:
- 09341895
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- ENGINE
$196.71 -
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
