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 Top End Gasket Kit - RMZ450 810590
MOOSE RACING
$74.84Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...09340870- SKU:
- 09340870
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$74.84 -
MOOSE RACING Top End Gasket Kit - TTR90 810616
MOOSE RACING
$40.77Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...09340872- SKU:
- 09340872
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$40.77 -
MOOSE RACING Motor Gasket Kit with Seal - TTR 811616
MOOSE RACING
$76.06Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...09340873- SKU:
- 09340873
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- COMPLETE
$76.06 -
MOOSE RACING Motor Gasket Kit with Seal - KX 811418
MOOSE RACING
$85.43Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...09340876- SKU:
- 09340876
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
$85.43 -
MOOSE RACING Top End Gasket Kit - YZ250 810669
MOOSE RACING
$29.50Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...09341516- SKU:
- 09341516
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$29.50 -
MOOSE RACING Head Cover Gasket - YZ/WR450 817853
MOOSE RACING
$30.45Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...09341469- SKU:
- 09341469
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- MATERIAL:
- RUBBER
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$30.45 -
MOOSE RACING Head Cover Gasket - YZ/WR450 817854
MOOSE RACING
$31.04Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...09341470- SKU:
- 09341470
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- RUBBER
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
$31.04 -
MOOSE RACING Head Cover Gasket - KX450F 817855
MOOSE RACING
$29.32Moose can now handle all your gasket and seal needs at a fraction of OEM cost, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmission with total confidence as each set is designed for durability and...09341471- SKU:
- 09341471
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- MATERIAL:
- RUBBER
- TYPE:
- HEAD COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$29.32 -
MOOSE RACING Motor Gasket Kit with Seal - CRF250 811262
MOOSE RACING
$171.17Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...09341475- SKU:
- 09341475
- Availability:
- Ships Same Business Day
- Weight:
- 0.43 LBS
$171.17 -
MOOSE RACING Motor Gasket Kit with Seal - CRF450R 811267
MOOSE RACING
$154.45Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...09341476- SKU:
- 09341476
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
$154.45 -
MOOSE RACING Motor Gasket Kit with Sea - CRF450X 811276
MOOSE RACING
$222.92Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...09341477- SKU:
- 09341477
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
$222.92 -
MOOSE RACING Motor Gasket Kit with Seal - KX250F 811468
MOOSE RACING
$166.50Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...09341478- SKU:
- 09341478
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$166.50 -
MOOSE RACING Motor Gasket Kit with Seal - KX450F 811469
MOOSE RACING
$191.42Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...09341479- SKU:
- 09341479
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$191.42 -
MOOSE RACING Motor Gasket Kit with Seal - RMZ250 811568
MOOSE RACING
$157.37Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...09341481- SKU:
- 09341481
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- TYPE:
- ENGINE
$157.37 -
MOOSE RACING Motor Gasket Kit with Seal - DRZ400 811585
MOOSE RACING
$127.16Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...09341482- SKU:
- 09341482
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- COMPLETE
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
$127.16 -
MOOSE RACING Motor Gasket Kit with Seal - RMZ450 811590
MOOSE RACING
$123.04Moose can now handle all your gasket and seal needs at a fraction of OEM cost, Rebuild the engine and transmission with total confidence as each set is designed for durability and accurate fit, Oil seals are genuine OEM replacement seals, Sets include...09341483- SKU:
- 09341483
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$123.04 -
MOOSE RACING Clutch Cover Gasket 817251
MOOSE RACING
$12.01Moose can now handle all your gasket and seal needs at a fraction of OEM cast, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmissions with total confidence as each set is designed for durability and...M817251- SKU:
- M817251
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- TYPE:
- CLUTCH COVER
$12.01 -
MOOSE RACING Clutch Cover Gasket 817252
MOOSE RACING
$6.38Moose can now handle all your gasket and seal needs at a fraction of OEM cast, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmissions with total confidence as each set is designed for durability and...M817252- SKU:
- M817252
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$6.38 -
MOOSE RACING Clutch Cover Gasket 817402
MOOSE RACING
$7.46Moose can now handle all your gasket and seal needs at a fraction of OEM cast, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmissions with total confidence as each set is designed for durability and...M817402- SKU:
- M817402
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
$7.46 -
MOOSE RACING Clutch Cover Gasket 817450
MOOSE RACING
$6.48Moose can now handle all your gasket and seal needs at a fraction of OEM cast, High-tech materials provide unmatched reliability and performance, Rebuild the engine and transmissions with total confidence as each set is designed for durability and...M817450- SKU:
- M817450
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$6.48
