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
-
HOT RODS Water Pump Repair Kit Honda WPK0012
HOT RODS
$39.95A leaking water pump compromises cooling system integrity and risks catastrophic engine damage—this repair kit restores your Honda's thermal management without replacing the entire assembly. Whether you're addressing a weeping gasket or a worn bearing,...09342924- SKU:
- 09342924
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$39.95 -
HOT RODS Water Pump Repair Kit - Honda WPK0013
HOT RODS
$38.95A leaking or failing water pump can quickly compromise engine temperatures and lead to costly damage. This HOT RODS repair kit gives you precision OEM-quality bearings and seals to restore your pump to factory specifications without replacing the entire...09342925- SKU:
- 09342925
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$38.95Qty in Cart: 0Quantity:Price:$38.95Subtotal: -
HOT RODS Water Pump Repair Kit - Yamaha WPK0016
HOT RODS
$34.95A leaking or failing water pump doesn't just waste coolant—it compromises engine temperature control and can lead to catastrophic overheating. This HOT RODS repair kit delivers OEM-quality replacement components that restore your pump to factory...09342928- SKU:
- 09342928
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$34.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0020
HOT RODS
$34.95A leaking water pump compromises engine cooling efficiency and risks catastrophic overheating—this repair kit restores OEM-spec performance without replacing the entire assembly. Whether you're addressing a weeping seal or a failed bearing, the HOT RODS...09342931- SKU:
- 09342931
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$34.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0021
HOT RODS
$30.95A leaking water pump compromises cooling system integrity and risks catastrophic engine failure—this repair kit restores OEM performance without full pump replacement. HOT RODS' precision-engineered components address the root causes of pump degradation:...09342932- SKU:
- 09342932
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
COMETIC Top End Gaskets - KTM C3606
COMETIC
$74.95A failed top end gasket can cost you race time, engine damage, and hundreds in repairs. COMETIC's C3606 gasket kit gives you OE-spec sealing with the durability trusted by professional racers worldwide. Install with confidence knowing your KTM top end is...09345414- SKU:
- 09345414
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$74.95Qty in Cart: 0Quantity:Price:$74.95Subtotal: -
COMETIC Lower End Gaskets - KTM C3606BE
COMETIC
$115.95Maintaining proper compression and preventing fluid leakage is critical to reliable engine performance, especially in high-stress racing applications. COMETIC lower end gaskets are engineered to OEM specifications and trusted by professional teams...09345415- SKU:
- 09345415
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
- UNITS:
- SET
$115.95 -
COMETIC Top End Gasket Set - Husqvarna C7734
COMETIC
$29.95A top-end gasket failure can sideline your build and compromise engine integrity. COMETIC's multi-layered steel construction with Viton rubber coating is engineered to handle the extreme pressures of modern high-output 4-strokes—both naturally aspirated...C7734- SKU:
- C7734
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE METRIC:
- 54.00 MM
- THICKNESS IMPERIAL:
- 0,012'
- THICKNESS METRIC:
- 0.31 MM
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
$29.95 -
COMETIC Top End Gasket Set - Honda C7757
COMETIC
$47.95A quality top-end gasket set is non-negotiable for engine longevity and performance consistency. The COMETIC C7757 delivers multi-layered steel construction with Viton rubber coating designed to handle the extreme pressures of high-output engines while...C7757- SKU:
- C7757
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 54.00 MM
- THICKNESS IMPERIAL:
- 0,012'
- THICKNESS METRIC:
- 0.31 MM
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$47.95Qty in Cart: 0Quantity:Price:$47.95Subtotal: -
COMETIC Bottom End Gasket Set - Yamaha C3057BE
COMETIC
$90.95A proper engine rebuild demands precision at every level—and the bottom end is where reliability is sealed. The COMETIC C3057BE Bottom End Gasket Set supplies OEM-engineered seals and gaskets that prevent oil leakage, maintain pressure integrity, and...09344080- SKU:
- 09344080
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
- MODEL:
- HI-PERFORMANCE
- UNITS:
- KIT
$90.95 -
COMETIC Top End Gasket Set - Kawasaki C3501
COMETIC
$33.95A quality top-end gasket set is non-negotiable if you're planning an engine rebuild or refresh—factory gaskets can't handle the cylinder pressures of modern performance engines, especially in boosted applications. COMETIC's Kawasaki C3501 set uses...09344186- SKU:
- 09344186
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 48.50 MM
- RIDING STYLE:
- OFF-ROAD
$33.95 -
COMETIC Top End Gasket Set - KTM C3503
COMETIC
$36.95A failing top-end gasket will cost you far more than the price of this kit—lost compression, oil weeping, and catastrophic engine damage happen fast on high-output 4-stroke machines. The COMETIC C3503 gasket set is engineered to handle the extreme...09344189- SKU:
- 09344189
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 39.00 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$36.95 -
COMETIC Bottom End Gasket Set - KTM C3517
COMETIC
$47.95A complete bottom end gasket kit is essential for any engine rebuild—sealing leaks and maintaining compression are non-negotiable for reliability and performance. COMETIC's C3517 gasket set includes every seal, O-ring, and washer needed to properly...09344200- SKU:
- 09344200
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- BOTTOM END
- MODEL:
- HI-PERFORMANCE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$47.95 -
COMETIC Top End Gasket Set - Kawasaki C3541
COMETIC
$33.95A quality top-end gasket set is critical to maintaining reliable compression and preventing combustion blow-by, especially when running elevated boost or high naturally-aspirated power levels. The COMETIC C3541 combines multi-layered steel construction...09344208- SKU:
- 09344208
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- THICKNESS IMPERIAL:
- 0,012'
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 0.31 MM
- BORE SIZE METRIC:
- 48.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
$33.95Qty in Cart: 0Quantity:Price:$33.95Subtotal: -
COMETIC Top End Gasket Set - Yamaha C3550-EST
COMETIC
$75.95A quality top end gasket set is non-negotiable for engines pushing high horsepower and cylinder pressure—factory gaskets simply aren't engineered to handle sustained boost or naturally aspirated outputs. The COMETIC C3550-EST uses multi-layered steel...09344213- SKU:
- 09344213
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE SIZE METRIC:
- 80.00 MM
- THICKNESS IMPERIAL:
- 0,027'
- THICKNESS METRIC:
- 0.25 MM
- THICKNESS IMPERIAL:
- 0,010'
- THICKNESS METRIC:
- 0.69 MM
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
$75.95 -
COMETIC Stator Gasket - Honda EC1078015AFM
COMETIC
$11.95Factory stator cover gaskets fail prematurely due to heat cycling and limited sealing surfaces on modern engine cases—and traditional gaskets stick to the case, turning a 15-minute job into an hour of scraping and frustration. The COMETIC Stator Gasket...09344371- SKU:
- 09344371
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STATOR COVER
$11.95Qty in Cart: 0Quantity:Price:$11.95Subtotal: -
COMETIC Stator Gasket - Kawasaki EC1081032AFM
COMETIC
$16.95Stator cover gasket failures lead to oil seepage, contaminated ignition systems, and costly engine damage. The COMETIC Stator Gasket eliminates the frustration of repeated failures and difficult replacements by combining a bonded aluminum core with AFM...09344372- SKU:
- 09344372
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 0.81 MM
- UNITS:
- EACH
- TYPE:
- STATOR COVER
- RIDING STYLE:
- OFF-ROAD
$16.95Qty in Cart: 0Quantity:Price:$16.95Subtotal: -
COMETIC Clutch Gasket - Kawasaki EC1102018AFM
COMETIC
$8.95Clutch cover gasket failure leads to oil seepage, contamination, and costly engine rebuilds. The COMETIC EC1102018AFM eliminates these headaches with an AFM composite construction that delivers a superior seal without sealants, reducing installation time...09344376- SKU:
- 09344376
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$8.95Qty in Cart: 0Quantity:Price:$8.95Subtotal: -
COMETIC Clutch Gasket - Kawasaki EC1184032AFM
COMETIC
$15.95A quality clutch gasket is critical to preventing oil seepage and maintaining consistent clutch engagement—degraded gaskets lead to costly fluid loss and potential clutch contamination. COMETIC's AFM gasket delivers superior sealing with an...09344384- SKU:
- 09344384
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- ATV
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,032'
- RIDING STYLE:
- OFF-ROAD
$15.95 -
COMETIC Stator Gasket - Honda EC1416032AFM
COMETIC
$19.95If you're tired of gasket scraping and repeat leaks at the stator cover, the COMETIC AFM gasket eliminates both problems with its bonded aluminum core and superior sealing geometry. This gasket won't stick to your engine case, cutting service time...09344394- SKU:
- 09344394
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STATOR COVER
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- MODEL:
- HI-PERFORMANCE
$19.95
