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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VINTCO Oil Seal Kit - Kawasaki KOS013
VINTCO
$39.95Oil Seal Kit - Kawasaki Complete your engine rebuild with the necessary oil seals and o-rings for the engine*s lower end, Most applications include both crankshaft main seals, kick starter seals, shift shaft seals, clutch release shaft seals and...09347361- SKU:
- 09347361
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$39.95 -
MOOSE RACING Top End Gasket 8100034MSE
MOOSE RACING
$94.30MOOSE RACING Top End Gasket09347460- SKU:
- 09347460
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$94.30 -
MOOSE RACING Top End Gasket - Honda 8100047MSE
MOOSE RACING
$69.24MOOSE RACING Top End Gasket - Honda09347461- SKU:
- 09347461
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$69.24 -
MOOSE RACING Top End Gasket - Yamaha 8100060MSE
MOOSE RACING
$34.55MOOSE RACING Top End Gasket - Yamaha09347462- SKU:
- 09347462
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$34.55 -
MOOSE RACING Outer Clutch Cover Gasket - Kawasaki 816831MSE
MOOSE RACING
$10.54Outer Clutch Cover Gasket - Kawasaki Individually sold gaskets are great when replacing a clutch or to seal a leaky ignition cover, Made in the USA09347465- SKU:
- 09347465
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$10.54 -
MOOSE RACING Inner Clutch Gasket - Honda 816352MSE
MOOSE RACING
$12.47Inner Clutch Gasket - Honda Used to replace a clutch or to seal a leaky ignition cover, Made in the U.S.A.09347469- SKU:
- 09347469
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$12.47 -
ATHENA Complete Gasket Kit - Honda P400210900323
ATHENA
$195.95Complete Gasket Kit - Honda Head gasket features rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core material features high spring-back and superior tensile strength, Revolutionary transparent coating guarantees...09347376- SKU:
- 09347376
- Availability:
- Ships Same Business Day
- Weight:
- 0.62 LBS
$195.95Qty in Cart: 0Quantity:Price:$195.95Subtotal: -
ATHENA Top End Gasket Kit - Honda P400210600323
ATHENA
$65.95Top End Gasket Kit - Honda Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason, Kit includes a top-of-the line MLSS head gasket and two or more premium quality base gaskets of...09347377- SKU:
- 09347377
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$65.95 -
ATHENA Complete Gasket Kit - Honda P400210900322
ATHENA
$212.95Complete Gasket Kit - Honda Head gasket features rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core material features high spring-back and superior tensile strength, Revolutionary transparent coating guarantees...09347472- SKU:
- 09347472
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
$212.95 -
ATHENA Top End Gasket Kit - Beta P400060600014
ATHENA
$58.95Top End Gasket Kit - Beta Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason, Kit includes a top-of-the line MLSS head gasket and two or more premium quality base gaskets of...09347506- SKU:
- 09347506
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
$58.95 -
ATHENA Top End Gasket Kit - Kawasaki P400250600071
ATHENA
$87.95Top End Gasket Kit - Kawasaki Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason, Kit includes a top-of-the line MLSS head gasket and two or more premium quality base gaskets of...09347507- SKU:
- 09347507
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
$87.95 -
ATHENA Top End Gasket Kit - Suzuki P400510600099
ATHENA
$72.95Top End Gasket Kit - Suzuki Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason, Kit includes a top-of-the line MLSS head gasket and two or more premium quality base gaskets of...09347508- SKU:
- 09347508
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
$72.95Qty in Cart: 0Quantity:Price:$72.95Subtotal: -
ATHENA Complete Gasket Kit - Beta P400060900014
ATHENA
$176.95Complete Gasket Kit - Beta Head gasket features rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core material features high spring-back and superior tensile strength, Revolutionary transparent coating guarantees...09347509- SKU:
- 09347509
- Availability:
- Ships Same Business Day
- Weight:
- 0.52 LBS
$176.95 -
ATHENA Complete Gasket Kit - Kawasaki P400250900071
ATHENA
$227.95Complete Gasket Kit - Kawasaki Head gasket features rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core material features high spring-back and superior tensile strength, Revolutionary transparent coating...09347510- SKU:
- 09347510
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
$227.95 -
ATHENA Complete Gasket Kit - Suzuki P400510900099
ATHENA
$218.95Complete Gasket Kit - Suzuki Head gasket features rubber-coated spring steel construction, Soft steel base gaskets are rubber coated, Steel core material features high spring-back and superior tensile strength, Revolutionary transparent coating...09347511- SKU:
- 09347511
- Availability:
- Ships Same Business Day
- Weight:
- 0.64 LBS
$218.95 -
ATHENA Water Pump Gasket Kit - Kawasaki P400250475017
ATHENA
$50.95Water Pump Gasket Kit - Kawasaki Includes water pump gasket, clutch cover gasket, water pump shaft oil seals, washers and bearings when applicable, Kit contents will vary slightly based on application09347512- SKU:
- 09347512
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
$50.95 -
ATHENA Water Pump Gasket Kit - Gas Gas/Husqvarna/KTM P400270475022
ATHENA
$61.95Water Pump Gasket Kit - Gas Gas/Husqvarna/KTM Includes water pump gasket, clutch cover gasket, water pump shaft oil seals, washers and bearings when applicable, Kit contents will vary slightly based on application09347513- SKU:
- 09347513
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
$61.95 -
MOOSE RACING Complete Gasket Set - Honda 8080039MSE
MOOSE RACING
$135.21Complete Gasket Set - Honda Moose 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...09347463- SKU:
- 09347463
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$135.21 -
MOOSE RACING Complete Gasket Set - Honda 8080046MSE
MOOSE RACING
$184.65Complete Gasket Set - Honda Moose 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...09347464- SKU:
- 09347464
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$184.65 -
MOOSE RACING Inner Clutch Gasket 816829MSE
MOOSE RACING
$18.21Inner Clutch Gasket 816829MSE Essential component for clutch replacement or ignition cover sealing Manufactured in the U.S.A. for superior quality Designed for a precise fit, ensuring optimal performance Durable materials resist wear and...09347466- SKU:
- 09347466
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$18.21
