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 Clutch Cover Gasket 819047
MOOSE RACING
$13.64A failing clutch cover gasket compromises engine sealing and invites oil leakage that degrades performance and reliability. The MOOSE RACING 819047 delivers OEM-quality sealing with precision engineering and domestic manufacturing, giving you the...09345902- SKU:
- 09345902
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$13.64 -
MOOSE RACING Head Cover Gasket - KTM 819048
MOOSE RACING
$13.64Head cover gaskets are critical sealing components that prevent oil leakage and maintain engine integrity during operation. OEM replacements come at a premium price, but the MOOSE RACING Head Cover Gasket delivers genuine reliability at a fraction of the...09345903- SKU:
- 09345903
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
- UNITS:
- EACH
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- GASKET
$13.64 -
MOOSE RACING Complete Motor Gasket Kit - YZ125 808636
MOOSE RACING
$54.00A complete engine and transmission rebuild demands gaskets and seals engineered for precision fit and lasting durability. This Moose Racing kit eliminates the guesswork of sourcing individual components, giving you every gasket, o-ring, and seal needed...M808636- SKU:
- M808636
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$54.00 -
MOOSE RACING Complete Motor Gasket Kit - YZ125 808637
MOOSE RACING
$53.66A complete engine and transmission rebuild demands gaskets and seals that match OEM precision without the OEM price tag. The MOOSE RACING Complete Motor Gasket Kit gives you every gasket, o-ring, and valve seal needed for a full bottom-end refresh, so...M808637- SKU:
- M808637
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$53.66 -
MOOSE RACING Complete Motor Gasket Kit - YZ125 808639
MOOSE RACING
$53.66A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work—this Moose Racing kit delivers OEM-quality components at a fraction of the cost. Whether you're refreshing your YZ125 after a season of hard...M808639- SKU:
- M808639
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$53.66 -
MOOSE RACING Complete Motor Gasket Kit - YZ250 808670
MOOSE RACING
$60.26A complete engine and transmission rebuild demands precision gaskets and seals that won't fail under race conditions or high-mileage wear. The MOOSE RACING Complete Motor Gasket Kit delivers OEM-quality replacement seals at a fraction of OEM pricing,...M808670- SKU:
- M808670
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$60.26 -
MOOSE RACING Complete Motor Gasket Kit - YZ250F/WR250F 808671
MOOSE RACING
$109.78A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise reliability or break your budget. This Moose Racing kit delivers OEM-quality components at a fraction of dealership pricing, allowing you to restore your...M808671- SKU:
- M808671
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$109.78 -
MOOSE RACING Complete Motor Gasket Kit - YZ400F/WR400F 808675
MOOSE RACING
$111.90A complete engine rebuild demands precision gaskets and seals that won't compromise reliability or performance. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork and expense of sourcing individual components—you get every gasket,...M808675- SKU:
- M808675
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$111.90Qty in Cart: 0Quantity:Price:$111.90Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - Yamaha 808676
MOOSE RACING
$111.90A complete engine and transmission rebuild requires precision-fit gaskets and seals that can withstand demanding operating conditions. The MOOSE RACING Complete Motor Gasket Kit eliminates the headache of sourcing individual components by bundling...M808676- SKU:
- M808676
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$111.90 -
MOOSE RACING Top End Gasket Kit - CR250R 810261
MOOSE RACING
$47.28When you're rebuilding a CR250R top end, you need gaskets and seals that match OEM precision without the OEM price tag. This Moose Racing kit gives you every component required for a complete top-end rebuild—from valve seals to base gaskets—manufactured...M810261- SKU:
- M810261
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$47.28 -
MOOSE RACING Top End Gasket Kit - XR400 810265
MOOSE RACING
$55.47A top-end rebuild demands precision—and compromising on gaskets invites leaks, compression loss, and premature wear. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals and gaskets at a fraction of OEM pricing, so you can confidently refresh...M810265- SKU:
- M810265
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$55.47Qty in Cart: 0Quantity:Price:$55.47Subtotal: -
MOOSE RACING Top End Gasket Kit - KTM 65SX 810302
MOOSE RACING
$31.50A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or require multiple trips back to the workbench. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals at a fraction of OEM pricing, engineered...M810302- SKU:
- M810302
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$31.50 -
MOOSE RACING Top End Gasket Kit - KTM 125 810304
MOOSE RACING
$32.09A top-end rebuild demands precision and reliability—this Moose Racing gasket kit delivers both at a fraction of OEM pricing. Whether you're replacing a worn piston or performing routine maintenance, you get every seal, O-ring, and gasket needed for a...M810304- SKU:
- M810304
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$32.09 -
MOOSE RACING Top End Gasket Kit - KTM 360/380 810307
MOOSE RACING
$32.09When you're rebuilding a KTM 360/380 top end, gasket failure isn't an option. The MOOSE RACING Top End Gasket Kit gives you OEM-quality sealing at a fraction of the cost, with every component engineered for a reliable rebuild. Whether you're replacing a...M810307- SKU:
- M810307
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$32.09 -
MOOSE RACING Top End Gasket Kit - 200SX 810308
MOOSE RACING
$32.09A top-end rebuild demands precision—gaskets and seals that won't weep, leak, or fail under load. The MOOSE RACING Top End Gasket Kit eliminates the risk of mixing incompatible OEM and aftermarket components by providing every gasket, O-ring, and seal...M810308- SKU:
- M810308
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$32.09Qty in Cart: 0Quantity:Price:$32.09Subtotal: -
MOOSE RACING Top End Gasket Kit - 125SX/EX 810309
MOOSE RACING
$32.09A complete top-end rebuild requires precision-matched gaskets and seals that maintain compression integrity and prevent oil leakage—OEM parts command premium pricing, but the MOOSE RACING Top End Gasket Kit delivers genuine replacement quality at a...M810309- SKU:
- M810309
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$32.09 -
MOOSE RACING Top End Gasket Kit - KX80 810402
MOOSE RACING
$18.96A complete top-end gasket kit is essential when rebuilding your KX80 after a piston replacement or routine engine maintenance. MOOSE Racing delivers OEM-quality seals and gaskets at a fraction of OEM pricing, so you can confidently reassemble your engine...M810402- SKU:
- M810402
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$18.96 -
MOOSE RACING Top End Gasket Kit - KX80 810403
MOOSE RACING
$18.96A top-end rebuild demands precision gaskets and seals that won't fail under race conditions or repeated use. The MOOSE RACING Top End Gasket Kit delivers OEM-quality components at a fraction of the cost, letting you rebuild your KX80 with confidence...M810403- SKU:
- M810403
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$18.96 -
MOOSE RACING Top End Gasket Kit - KX80 810404
MOOSE RACING
$23.33When you're rebuilding a KX80 top end, every gasket and seal matters—factory originals drain your wallet, but cheap alternatives compromise reliability. The MOOSE RACING Top End Gasket Kit delivers OEM-quality seals and precision-fit gaskets at a...M810404- SKU:
- M810404
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$23.33 -
MOOSE RACING Top End Gasket Kit - YZ 400 F 810675
MOOSE RACING
$68.81A top-end rebuild demands precision gaskets and seals that won't compromise engine integrity or require you to choose between quality and cost. The MOOSE RACING Top End Gasket Kit delivers OEM-equivalent performance at a fraction of the price, using...M810675- SKU:
- M810675
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
$68.81
