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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On Sale
ATHENA Water Pump Gasket Kit - Yamaha P400485475005
ATHENA
MSRP: $36.95Now: $31.00Was: $36.95A failing water pump gasket can compromise your entire cooling system, leading to overheating, performance loss, and catastrophic engine damage. The ATHENA Water Pump Gasket Kit gives you...09346087- SKU:
- 09346087
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
MSRP: $36.95Now: $31.00Was: $36.95 -
HOT RODS Water Pump Repair Kit - Husqvarna WPK0066
HOT RODS
$79.95A leaking water pump can compromise your engine's cooling system and lead to overheating—especially under the stress of high-RPM operation. This HOT RODS repair kit gives you everything needed to...09345373- SKU:
- 09345373
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$79.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0015
HOT RODS
$34.95A leaking water pump compromises engine cooling and can lead to catastrophic overheating—especially under racing conditions where thermal management is critical. This HOT RODS repair kit replaces...09342927- SKU:
- 09342927
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$34.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0022
HOT RODS
$34.95A leaking water pump will compromise your engine's cooling system and lead to catastrophic overheating—especially under racing conditions. This HOT RODS repair kit supplies all the internal seals,...09342933- SKU:
- 09342933
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$34.95 -
HOT RODS Water Pump Repair Kit - Suzuki WPK0042
HOT RODS
$30.95A leaking water pump compromises cooling system integrity and risks catastrophic engine damage. This HOT RODS repair kit supplies genuine OEM-quality components—precision micro bearings, seals, and...09342950- SKU:
- 09342950
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
HOT RODS Water Pump Repair Kit - KTM WPK0049
HOT RODS
$36.95Water pump failures don't just leave you stranded—they compromise engine cooling and risk catastrophic overheating. The HOT RODS Water Pump Repair Kit (WPK0049) delivers OEM-equivalent seals,...09342956- SKU:
- 09342956
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$36.95Qty in Cart: 0Quantity:Price:$36.95Subtotal: -
HOT RODS Water Pump Repair Kit - KTM WPK0060
HOT RODS
$51.95A leaking water pump compromises cooling efficiency and risks catastrophic engine damage—especially under sustained high RPMs. This HOT RODS repair kit supplies OEM-equivalent components to restore...09344045- SKU:
- 09344045
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$51.95Qty in Cart: 0Quantity:Price:$51.95Subtotal: -
HOT RODS Water Pump Repair Kit - Honda WPK0001
HOT RODS
$34.95A failing water pump compromises engine cooling and can lead to catastrophic overheating—especially under racing conditions or sustained high-load driving. This repair kit gives you a cost-effective...09342913- SKU:
- 09342913
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$34.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0019
HOT RODS
$34.95A leaking water pump compromises engine cooling efficiency and can lead to catastrophic overheating if left unaddressed. This HOT RODS repair kit supplies OEM-quality replacement seals and bearings...09342930- SKU:
- 09342930
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$34.95 -
On Sale
COMETIC Top End Gasket Set - XR650 C7681
COMETIC
MSRP: $47.95Now: $43.16Was: $47.95A properly sealed top end is non-negotiable for engine reliability and peak performance. The COMETIC C7681 gasket set delivers the precision sealing your XR650 demands, using multi-layered steel...C7681- SKU:
- C7681
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE METRIC:
- 101.00 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- UNITS:
- KIT
MSRP: $47.95Now: $43.16Was: $47.95 -
On Sale
COMETIC Exhaust Gasket - Kawasaki C3501EX
COMETIC
MSRP: $15.95Now: $14.36Was: $15.95Exhaust gasket failure leads to performance loss, increased emissions, and costly engine damage—especially under high heat and aggressive tuning. The COMETIC C3501EX delivers reliable, leak-free...09344187- SKU:
- 09344187
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- BORE SIZE METRIC:
- 48.50 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- MODEL:
- HI-PERFORMANCE
- TYPE:
- EXHAUST
MSRP: $15.95Now: $14.36Was: $15.95Qty in Cart: 0Quantity:Price:MSRP: $15.95Now: $14.36Was: $15.95Subtotal: -
On Sale
COMETIC Clutch Gasket - Honda EC1074018AFM
COMETIC
MSRP: $4.95Now: $4.46Was: $4.95A worn or failing clutch cover gasket leads to oil seepage, reduced clutch performance, and costly engine damage. The COMETIC Clutch Gasket eliminates these risks with a chemically bonded AFM...09344369- SKU:
- 09344369
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
MSRP: $4.95Now: $4.46Was: $4.95Qty in Cart: 0Quantity:Price:MSRP: $4.95Now: $4.46Was: $4.95Subtotal: -
On Sale
COMETIC Stator Gasket - Yamaha EC471020F
COMETIC
MSRP: $9.95Now: $8.96Was: $9.95A quality stator gasket is critical to preventing oil seepage and maintaining engine integrity, especially under high-RPM conditions. The COMETIC EC471020F eliminates the frustration of gasket...09344463- SKU:
- 09344463
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- MODEL:
- HI-PERFORMANCE
- TYPE:
- STATOR COVER
- PRODUCT NAME:
- GASKET
MSRP: $9.95Now: $8.96Was: $9.95 -
On Sale
COMETIC Stator Gasket - KTM EC494032AFM
COMETIC
MSRP: $21.95Now: $19.76Was: $21.95OEM stator cover gaskets fail prematurely due to adhesion to engine cases and material degradation under sustained heat cycles. The COMETIC Stator Gasket eliminates both problems with an AFM...09344465- SKU:
- 09344465
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STATOR COVER
- MODEL:
- HI-PERFORMANCE
- THICKNESS IMPERIAL:
- 0,032'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ATV
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS METRIC:
- 0.81 MM
- UNITS:
- EACH
MSRP: $21.95Now: $19.76Was: $21.95Qty in Cart: 0Quantity:Price:MSRP: $21.95Now: $19.76Was: $21.95Subtotal: -
On Sale
COMETIC Clutch Gasket - KTM EC496032AFM
COMETIC
MSRP: $21.95Now: $19.76Was: $21.95A leaking clutch cover gasket costs you time and money—whether through lost oil, extended service intervals, or emergency repairs. The COMETIC Clutch Gasket (EC496032AFM) eliminates these headaches...09344466- SKU:
- 09344466
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- MODEL:
- HI-PERFORMANCE
- THICKNESS IMPERIAL:
- 0,032'
MSRP: $21.95Now: $19.76Was: $21.95 -
On Sale
COMETIC Exhaust Gasket EX006042AM
COMETIC
MSRP: $7.95Now: $7.16Was: $7.95A failing exhaust gasket doesn't just leak—it compromises your engine's efficiency and can mask real performance issues under the hood. The COMETIC EX006042AM delivers reliable, high-temperature...09344513- SKU:
- 09344513
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
- BORE SIZE METRIC:
- 58.00 MM
- PRODUCT NAME:
- GASKET
- MODEL:
- HI-PERFORMANCE
- TYPE:
- EXHAUST
MSRP: $7.95Now: $7.16Was: $7.95 -
On Sale
COMETIC Exhaust Gasket EX008042AM
COMETIC
MSRP: $7.95Now: $7.16Was: $7.95Exhaust gasket failure doesn't just cause leaks—it compromises your entire system's performance and allows unmetered air into your engine. The COMETIC EX008042AM is engineered to seal consistently...09344515- SKU:
- 09344515
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 68.00 MM
- PRODUCT NAME:
- GASKET
- MODEL:
- HI-PERFORMANCE
- TYPE:
- EXHAUST
- UNITS:
- SET
MSRP: $7.95Now: $7.16Was: $7.95Qty in Cart: 0Quantity:Price:MSRP: $7.95Now: $7.16Was: $7.95Subtotal: -
On Sale
COMETIC Exhaust Gasket EX651
COMETIC
MSRP: $11.95Now: $10.76Was: $11.95Exhaust gasket failure compromises engine sealing and can lead to costly leaks and performance loss. The COMETIC EX651 uses a dual-layer construction with Viton® rubber coating and Armor-400...09344544- SKU:
- 09344544
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- MODEL:
- HI-PERFORMANCE
- TYPE:
- EXHAUST
- UNITS:
- SET
MSRP: $11.95Now: $10.76Was: $11.95 -
On Sale
COMETIC Exhaust Gasket - Kawasaki EX693064AM
COMETIC
MSRP: $4.95Now: $4.46Was: $4.95A compromised exhaust gasket doesn't just leak—it bleeds performance and invites catastrophic engine damage. The COMETIC EX693064AM is engineered to seal under extreme thermal stress, ensuring your...09344549- SKU:
- 09344549
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- THICKNESS IMPERIAL:
- 0,064'
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.63 MM
- BORE SIZE IMPERIAL:
- 3.858'
- MODEL:
- HI-PERFORMANCE
- TYPE:
- EXHAUST
- UNITS:
- SET
MSRP: $4.95Now: $4.46Was: $4.95Qty in Cart: 0Quantity:Price:MSRP: $4.95Now: $4.46Was: $4.95Subtotal: -
On Sale
COMETIC Exhaust Gasket - Suzuki EX877
COMETIC
MSRP: $8.95Now: $8.06Was: $8.95A failed exhaust gasket compromises both performance and reliability, allowing heat and combustion gases to escape where they shouldn't—costing you power and risking engine damage. The COMETIC EX877...09344556- SKU:
- 09344556
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE METRIC:
- 101.00 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET
- MODEL:
- HI-PERFORMANCE
- TYPE:
- EXHAUST
- UNITS:
- SET
MSRP: $8.95Now: $8.06Was: $8.95Qty in Cart: 0Quantity:Price:MSRP: $8.95Now: $8.06Was: $8.95Subtotal:
