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 OFFROAD Complete Gasket Set 8080038MSE
MOOSE OFFROAD
$92.81Complete Gasket Set 8080038MSE Comprehensive kit containing all essential gaskets and O-rings for a full engine and transmission rebuild. Includes valve seals for enhanced performance and reliability. Complete sets feature a formed valve...09346888- SKU:
- 09346888
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$92.81 -
MOOSE OFFROAD Gasket Set 8110047MSE
MOOSE OFFROAD
$139.85Gasket Set Set includes all gaskets and O-rings necessary to rebuild the entire engine and transmission; valve seals also included, Complete sets include formed valve cover gasket and oil seals, Non-complete sets do not include formed valve cover gasket...09346891- SKU:
- 09346891
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$139.85 -
MOOSE OFFROAD Gasket Clutch Inner - Honda 816326MSE
MOOSE OFFROAD
$23.36Gasket Clutch Inner - 816326MSE High-quality gasket designed specifically for Honda models Perfect for replacing a worn-out clutch or sealing ignition covers Manufactured in the U.S.A. for superior durability Ensures a tight seal to...09346894- SKU:
- 09346894
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$23.36 -
MOOSE OFFROAD Gasket Clutch Inner 816329MSE
MOOSE OFFROAD
$22.32Gasket Clutch Inner 816329MSE High-quality gasket designed for clutch replacement. Effectively seals leaky ignition covers to prevent oil leaks. Durable construction ensures long-lasting performance. Manufactured in the U.S.A. for...09346895- SKU:
- 09346895
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$22.32 -
MOOSE OFFROAD Gasket Clutch Inner 816341MSE
MOOSE OFFROAD
$20.73Gasket Clutch Inner 816341MSE High-quality gasket designed for clutch replacement Effective seal for leaky ignition covers Durably constructed to withstand extreme conditions Precision-engineered for a perfect fit Manufactured in the...09346896- SKU:
- 09346896
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$20.73 -
MOOSE OFFROAD Top End Gasket Set - Gas Gas/Husqvarna/KTM 8100035MSE
MOOSE OFFROAD
$73.01Top End Gasket Set - Gas Gas/Husqvarna/KTM Set includes all gaskets and O-rings necessary to rebuild the entire engine and transmission; valve seals also included, Complete sets include formed valve cover gasket and oil seals, Non-complete sets do not...09346915- SKU:
- 09346915
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$73.01 -
MOOSE OFFROAD Gasket Set with Oil Seal - Honda 8110036MSE
MOOSE OFFROAD
$178.50Gasket Set with Oil Seal - Honda Set includes all gaskets and O-rings necessary to rebuild the entire engine and transmission; valve seals also included, Complete sets include formed valve cover gasket and oil seals, Non-complete sets do not include...09346917- SKU:
- 09346917
- Availability:
- Ships Same Business Day
- Weight:
- 0.39 LBS
$178.50 -
MOOSE OFFROAD Gasket Set - Gas Gas/Husqvarna/KTM 8110044MSE
MOOSE OFFROAD
$166.03Gasket Set - Gas Gas/Husqvarna/KTM Set includes all gaskets and O-rings necessary to rebuild the entire engine and transmission; valve seals also included, Complete sets include formed valve cover gasket and oil seals, Non-complete sets do not include...09346918- SKU:
- 09346918
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
$166.03 -
MOOSE OFFROAD Head Cover Gasket - Yamaha 819200MSE
MOOSE OFFROAD
$51.54Head Cover Gasket - Yamaha 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 designed...09346943- SKU:
- 09346943
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
$51.54 -
MOOSE OFFROAD Motor Gasket Kit with Oil Seal - Honda 811285MSE
MOOSE OFFROAD
$179.68Motor Gasket Kit with Oil Seal - 811285MSE Comprehensive kit for complete engine and transmission rebuilds. Durable design ensures long-lasting performance. Includes genuine OEM replacement oil seals for optimal sealing. Valve seals and...09342209- SKU:
- 09342209
- Availability:
- Ships Same Business Day
- Weight:
- 0.53 LBS
$179.68 -
MOOSE OFFROAD Complete Motor Gasket Kit - Honda 808268MSE
MOOSE OFFROAD
$164.97Complete Motor Gasket Kit - 808268MSE Cost-effective solution for all gasket and seal requirements Constructed with high-tech materials for superior reliability Designed specifically for Honda engines and transmissions Includes all...09341885- SKU:
- 09341885
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$164.97 -
PROX Gasket Kit - Complete - Suzuki 34.3316
PROX
$114.95Gasket Kit - Complete - Suzuki Includes all necessary top-quality gaskets, rubber parts and valve stem seals to rebuild top-end and complete engines, respectively09345576- SKU:
- 09345576
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$114.95 -
PROX Top End Gasket Set - Kawasaki KX 450 F 35.4419
PROX
$89.95Top End Gasket Set - Kawasaki KX 450 F Offer any gasket you need for a top-end rebuild, Precision engineering and the use of first-class materials guarantee the quality you demand09345771- SKU:
- 09345771
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$89.95 -
PROX Top End Gasket Set - Honda 35.1348
PROX
$84.95Top End Gasket Set - 35.1348 Complete gasket set for Honda top-end rebuilds Includes all necessary gaskets for a comprehensive repair Precision-engineered for a perfect fit and optimal performance Manufactured with high-quality materials...09347108- SKU:
- 09347108
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$84.95 -
PROX Top End Gasket Set - Honda 35.1419
PROX
$84.95Top End Gasket Set - Honda Offer any gasket you need for a top-end rebuild, Precision engineering and the use of first-class materials guarantee the quality you demand09347111- SKU:
- 09347111
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$84.95Qty in Cart: 0Quantity:Price:$84.95Subtotal: -
PROX Top End Gasket Set - Honda XR650L 35.1623
PROX
$64.95Top End Gasket Set - Honda XR650L Offer any gasket you need for a top-end rebuild, Precision engineering and the use of first-class materials guarantee the quality you demand09347118- SKU:
- 09347118
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
$64.95 -
PROX Top End Gasket Set - Husqvarna/Gas Gas/KTM 35.6216
PROX
$69.95Top End Gasket Set - 35.6216 Comprehensive gasket set for top-end rebuilds Compatible with Husqvarna, Gas Gas, and KTM models Precision-engineered for optimal fit and performance Manufactured with high-quality materials for durability ...09347147- SKU:
- 09347147
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$69.95 -
PROX Top End Gasket Set - Husqvarna/Gas Gas/KTM 35.6319
PROX
$89.95Top End Gasket Set - 35.6319 Complete gasket set for top-end rebuilds on Husqvarna, Gas Gas, and KTM models. Crafted from high-quality materials for durability and performance. Precision-engineered for a perfect fit and optimal sealing. ...09347151- SKU:
- 09347151
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
$89.95 -
PROX Gasket Kit - Complete - Suzuki/Kawasaki 34.4021
PROX
$59.95Gasket Kit - Complete - 34.4021 Comprehensive kit for rebuilding top-end and complete engines Includes high-quality gaskets and rubber components Features durable valve stem seals for optimal performance Compatible with Suzuki and...09345587- SKU:
- 09345587
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$59.95 -
PROX Gasket Kit - Complete - Suzuki/Kawasaki 34.4100
PROX
$44.95Gasket Kit - Complete - Suzuki/Kawasaki 34.41 Comprehensive kit for top-end and complete engine rebuilds Includes high-quality gaskets and rubber components Features durable valve stem seals for optimal performance Designed specifically...09345589- SKU:
- 09345589
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$44.95
