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 816522
MOOSE RACING
$8.86A leaking ignition cover gasket compromises engine sealing and invites oil seepage that degrades performance and cleanliness. The MOOSE RACING Ignition Cover Gasket delivers OEM-grade reliability at a fraction of OEM pricing, ensuring a precise fit...M816522- SKU:
- M816522
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- IGNITION COVER
- UNITS:
- EACH
$8.86 -
MOOSE RACING Top End Gasket Kit - 50SXLC 810312
MOOSE RACING
$17.46A top-end rebuild demands precision components that won't compromise reliability or performance. This MOOSE RACING gasket kit delivers OEM-quality seals and gaskets at a fraction of factory pricing, letting you rebuild with confidence. Whether you're...09340264- SKU:
- 09340264
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$17.46 -
MOOSE RACING Motor Gasket Kit with Seal - XR50 811209
MOOSE RACING
$88.62A complete engine and transmission rebuild demands precision-fitted gaskets and seals that won't compromise your work or your budget. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent performance at a fraction of OEM pricing, giving you the...09340094- SKU:
- 09340094
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
$88.62 -
MOOSE RACING Motor Gasket Kit with Seal - XR70 811210
MOOSE RACING
$90.36A complete engine and transmission rebuild demands precision gaskets and seals that fit perfectly and hold up to demanding conditions. The MOOSE RACING Motor Gasket Kit delivers OEM-quality components at a fraction of the cost, eliminating the guesswork...09340095- SKU:
- 09340095
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$90.36 -
MOOSE RACING Motor Gasket Kit with Seal - CR85R 811211
MOOSE RACING
$82.98A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or your budget. MOOSE Racing delivers OEM-quality components at a fraction of dealership pricing, giving you the confidence to rebuild...09340096- SKU:
- 09340096
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
$82.98 -
MOOSE RACING Motor Gasket Kit with Seal - CRF150 811238
MOOSE RACING
$112.56A complete engine and transmission rebuild demands precision components that won't compromise durability or break your budget. This Moose Racing gasket and seal kit delivers OEM-quality sealing surfaces across your entire drivetrain, eliminating the need...09340097- SKU:
- 09340097
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$112.56 -
MOOSE RACING Motor Gasket Kit with Seal - CRF230 811242
MOOSE RACING
$124.38Engine and transmission rebuilds demand precision-fit gaskets and seals to ensure proper compression, prevent oil leakage, and maintain reliability under load. The Moose Racing Motor Gasket Kit delivers genuine OEM-quality seals at a fraction of OEM...09340098- SKU:
- 09340098
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$124.38 -
MOOSE RACING Motor Gasket Kit with Seal - XR250 811263
MOOSE RACING
$90.04A complete engine and transmission rebuild demands precision-fit gaskets and seals—substandard components lead to leaks, contamination, and catastrophic failure. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent quality at a fraction of...09340100- SKU:
- 09340100
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$90.04 -
MOOSE RACING Motor Gasket Kit with Seal - XR250 R/L 811258
MOOSE RACING
$121.59A complete engine and transmission rebuild requires precision-fit gaskets and seals—anything less compromises reliability and longevity. This MOOSE RACING kit eliminates the tedious sourcing of individual components by bundling everything you need for a...09340101- SKU:
- 09340101
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$121.59 -
MOOSE RACING Complete Motor Gasket Kit - CRF80/XR80 808208
MOOSE RACING
$74.51A complete engine and transmission rebuild demands precision gaskets and seals that won't fail mid-season. This Moose Racing gasket kit eliminates the guesswork and cost of sourcing individual components, giving you everything needed for a reliable,...M808208- SKU:
- M808208
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- COMPLETE
$74.51 -
MOOSE RACING Motor Gasket Kit with Seal - KTM 250 811328
MOOSE RACING
$149.21A 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-quality components at a fraction of dealership pricing, letting you rebuild with...09341010- SKU:
- 09341010
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$149.21 -
MOOSE RACING Head Cover Gasket - DRZ400 817848
MOOSE RACING
$26.18Valve cover gaskets fail silently—until oil starts seeping onto your engine bay and performance suffers. The MOOSE RACING Head Cover Gasket for your DRZ400 delivers OEM-quality sealing at a fraction of the OEM price, so you can rebuild with confidence...09341466- SKU:
- 09341466
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- MATERIAL:
- RUBBER
- TYPE:
- HEAD COVER
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
$26.18 -
MOOSE RACING Head Cover Gasket 817849
MOOSE RACING
$32.72A leaking valve cover gasket compromises engine sealing and can lead to oil loss and contamination. MOOSE RACING's OEM-equivalent head cover gasket delivers the precision fit and durability of factory parts at a fraction of the cost, allowing you to...09341467- SKU:
- 09341467
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
$32.72 -
MOOSE RACING Head Cover Gasket - YZ250F 817852
MOOSE RACING
$33.38Valve cover gaskets fail silently—until oil begins seeping onto your engine bay and performance suffers from heat buildup. The MOOSE RACING Head Cover Gasket delivers OEM-level sealing reliability at a fraction of dealer pricing, letting you rebuild your...09341468- SKU:
- 09341468
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
$33.38 -
MOOSE RACING Motor Gasket Kit with Seal - YZ/WR 811671
MOOSE RACING
$154.66A complete engine and transmission rebuild demands precision gaskets and seals that fit right and last—OEM quality shouldn't come with OEM prices. This Moose Racing kit consolidates every gasket, oil seal, and valve seal you need for a full bottom-end...09341484- SKU:
- 09341484
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$154.66 -
MOOSE RACING Motor Gasket Kit with Seal - WR250F 811678
MOOSE RACING
$109.14A complete engine and transmission rebuild demands precision-fit gaskets and seals—any leak or premature failure costs you race time and money. The MOOSE RACING Motor Gasket Kit delivers OEM-quality components at a fraction of dealership pricing, giving...09341485- SKU:
- 09341485
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
$109.14 -
MOOSE RACING Motor Gasket Kit with Seal - YZ/WR426 811676
MOOSE RACING
$148.00A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. MOOSE Racing delivers OEM-quality components at significantly lower cost, eliminating the guesswork and expense of sourcing individual...09341487- SKU:
- 09341487
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$148.00 -
MOOSE RACING Motor Gasket Kit with Seal - WR450 811679
MOOSE RACING
$160.30A complete engine and transmission rebuild demands precision-fit gaskets and seals—no shortcuts. MOOSE Racing delivers OEM-quality components at a fraction of the cost, letting you restore your WR450 with confidence and without compromising durability...09341488- SKU:
- 09341488
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
$160.30 -
MOOSE RACING Motor Gasket Kit with Seal - YZ450 811677
MOOSE RACING
$145.13A complete engine and transmission rebuild demands precision-fitted gaskets and seals—compromising on fit or material quality invites oil leaks, compression loss, and costly downtime. The MOOSE RACING Motor Gasket Kit delivers OEM-equivalent sealing...09341489- SKU:
- 09341489
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$145.13 -
MOOSE RACING Motor Gasket Kit with Seal - YZ450 811687
MOOSE RACING
$165.87A complete engine and transmission gasket rebuild requires precision-fit components that won't fail mid-season. The MOOSE RACING Motor Gasket Kit eliminates the guesswork and expense of sourcing OEM seals individually—every gasket and oil seal you need...09341490- SKU:
- 09341490
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$165.87
