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
-
MOOSE RACING Water Pump Rebuild Kit 821585
MOOSE RACING
$76.89A failing water pump doesn't just compromise cooling efficiency—it risks catastrophic engine damage and race-ending downtime. The MOOSE RACING Water Pump Rebuild Kit 821585 gives you everything...09345245- SKU:
- 09345245
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- REPAIR KIT
$76.89 -
MOOSE RACING Exhaust Gasket Kit 823148
MOOSE RACING
$21.87A quality exhaust gasket kit is critical to maintaining a sealed exhaust system—preventing exhaust leaks that reduce performance and create noise. MOOSE RACING's 823148 kit ensures proper sealing at...09345330- SKU:
- 09345330
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
$21.87 -
MOOSE RACING Exhaust Gasket Kit 823149
MOOSE RACING
$21.87A leaking exhaust gasket doesn't just waste horsepower—it compromises engine sealing, invites exhaust leaks, and can lead to costly damage if left unaddressed. The MOOSE RACING Exhaust Gasket Kit...09345331- SKU:
- 09345331
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$21.87 -
MOOSE RACING Exhaust Gasket Kit 823049
MOOSE RACING
$8.13A properly sealed exhaust system is critical to engine performance and longevity—leaks rob you of power, introduce unwanted noise, and allow exhaust gases to escape before your turbo or headers can...09345275- SKU:
- 09345275
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- EXHAUST
$8.13 -
MOOSE RACING Exhaust Gasket Kit 823104
MOOSE RACING
$21.48A failed exhaust gasket compromises both performance and reliability, allowing exhaust gases to escape before they reach your system and creating harmful air leaks. MOOSE RACING's Exhaust Gasket Kit...09345303- SKU:
- 09345303
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
$21.48 -
MOOSE RACING Exhaust Gasket Kit 823107
MOOSE RACING
$21.87A proper exhaust seal is foundational to engine performance and longevity. Worn or degraded gaskets allow exhaust leaks that compromise power output, increase emissions, and can damage surrounding...09345306- SKU:
- 09345306
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$21.87 -
MOOSE RACING Gasket - Top End - YZ250F 8100025
MOOSE RACING
$78.88A top-end rebuild demands precision-fit gaskets and seals to maintain compression, prevent oil leakage, and ensure reliable performance—especially after a piston replacement. The MOOSE RACING Gasket...09346583- SKU:
- 09346583
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
$78.88 -
MOOSE RACING Ignition Cover Gasket 816356
MOOSE RACING
$10.63An aging or damaged ignition cover gasket can compromise engine sealing and lead to oil seepage that undermines reliability. This MOOSE RACING gasket delivers OEM-equivalent durability at a fraction...09346541- SKU:
- 09346541
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
$10.63 -
MOOSE RACING Ignition Cover Gasket 816024
MOOSE RACING
$7.97A worn or degraded ignition cover gasket compromises engine sealing and can lead to oil leakage, contamination, and potential ignition system failures. The MOOSE Racing Ignition Cover Gasket 816024...09346919- SKU:
- 09346919
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- IGNITION COVER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$7.97 -
MOOSE RACING Head Cover Gasket - KTM 817893
MOOSE RACING
$18.93Valve cover gaskets fail silently until oil starts leaking onto your engine bay. The OEM gasket for your KTM comes with an OEM price tag—but Moose Racing delivers the same reliable sealing...09346971- SKU:
- 09346971
- Availability:
- Ships Same Business Day
- Weight:
- 1.64 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
$18.93Qty in Cart: 0Quantity:Price:$18.93Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - CR85R 808211
MOOSE RACING
$58.40A complete engine and transmission rebuild demands gasket and seal integrity—any compromise here leads to leaks, loss of compression, and catastrophic failure. The MOOSE RACING Complete Motor Gasket...09340265- SKU:
- 09340265
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$58.40Qty in Cart: 0Quantity:Price:$58.40Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - YZ/WR400 811675
MOOSE RACING
$140.18A complete engine and transmission rebuild demands precision-fit gaskets and seals—and OEM replacements often come with OEM pricing. This Moose Racing kit delivers genuine OEM-quality oil seals...09341486- SKU:
- 09341486
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$140.18Qty in Cart: 0Quantity:Price:$140.18Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - Husqvarna/KTM 811365
MOOSE RACING
$174.50A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or your budget. The MOOSE RACING Motor Gasket Kit eliminates the guesswork and...09344789- SKU:
- 09344789
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$174.50Qty in Cart: 0Quantity:Price:$174.50Subtotal: -
MOOSE RACING Complete Motor Gasket Kit - KDX200 808440
MOOSE RACING
$73.01A complete engine and transmission rebuild requires gaskets and seals that won't fail under stress. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork by bundling every gasket,...M808440- SKU:
- M808440
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
- TYPE:
- COMPLETE
$73.01 -
MOOSE RACING Complete Motor Gasket Kit - RM250 808593
MOOSE RACING
$112.43A complete engine and transmission rebuild requires precision-fit gaskets and seals that can handle sustained performance without leaking or failing. The MOOSE RACING Complete Motor Gasket Kit...09340974- SKU:
- 09340974
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
$112.43Qty in Cart: 0Quantity:Price:$112.43Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal - KTM 811371
MOOSE RACING
$105.55A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise performance or longevity. MOOSE RACING delivers OEM-quality replacement seals at a fraction of...09345367- SKU:
- 09345367
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$105.55Qty in Cart: 0Quantity:Price:$105.55Subtotal: -
MOOSE RACING Head Cover Gasket - Yamaha 817944
MOOSE RACING
$26.58Valve cover gaskets fail silently—until oil starts seeping onto your engine bay. This Moose Racing head cover gasket delivers OEM-level sealing performance at a fraction of the dealer price, letting...09346181- SKU:
- 09346181
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- VALVE COVER
- UNITS:
- EACH
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
$26.58 -
MOOSE RACING Ignition Cover Gasket 816177
MOOSE RACING
$11.14A worn or damaged ignition cover gasket compromises engine sealing and invites oil leakage around critical ignition components. The MOOSE RACING 816177 delivers OEM-quality sealing with the...09346934- SKU:
- 09346934
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- TYPE:
- IGNITION COVER
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$11.14 -
MOOSE RACING Complete Motor Gasket Kit - KX125 808423
MOOSE RACING
$58.40A complete engine and transmission rebuild demands precision gasket sealing—any leak compromises performance and reliability. This Moose Racing kit eliminates the guesswork by bundling every gasket,...M808423- SKU:
- M808423
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$58.40 -
MOOSE RACING Exhaust Gasket Kit 823166
MOOSE RACING
$14.99A failing exhaust gasket compromises both performance and durability, allowing exhaust gases to escape before they reach your muffler and creating dangerous leaks at critical connection points. This...09345347- SKU:
- 09345347
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- EXHAUST
- UNITS:
- KIT
$14.99
