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
-
On Sale
ATHENA Water Pump Gasket Kit - Yamaha P400485475005
ATHENA
MSRP: $34.95Now: $31.00Was: $34.95A 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 OEM-equivalent sealing with all the gaskets and shaft seals needed...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: $34.95Now: $31.00Was: $34.95 -
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 restore pump function without replacing the entire...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 worn bearings and seals without requiring a full pump...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, bearings, and gaskets needed to restore your pump to OEM...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 gaskets—to restore your pump to factory specifications...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, bearings, and gaskets to restore your pump's integrity without...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 full pump functionality without replacing the entire...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 way to restore your pump to OEM performance without a...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 to restore your water pump to factory specifications...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 -
COMETIC Top End Gasket Set - XR650 C7681
COMETIC
$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 construction with Viton-coated embossed layers to handle...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
$47.95 -
COMETIC Exhaust Gasket - Kawasaki C3501EX
COMETIC
$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 sealing across extreme temperature ranges, engineered...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
$15.95Qty in Cart: 0Quantity:Price:$15.95Subtotal: -
COMETIC Clutch Gasket - Honda EC1074018AFM
COMETIC
$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 material that maintains a superior seal under high-temperature...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
$4.95Qty in Cart: 0Quantity:Price:$4.95Subtotal: -
COMETIC Stator Gasket - Yamaha EC471020F
COMETIC
$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 failure by combining an aluminum-reinforced core with AFM...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
$9.95 -
COMETIC Stator Gasket - KTM EC494032AFM
COMETIC
$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 (aluminum-core nitrile) construction that resists sticking,...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
$21.95Qty in Cart: 0Quantity:Price:$21.95Subtotal: -
COMETIC Clutch Gasket - KTM EC496032AFM
COMETIC
$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 with a bonded aluminum-core design that holds its seal...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'
$21.95 -
COMETIC Exhaust Gasket EX006042AM
COMETIC
$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 sealing that won't blow out or push out, even under...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
$7.95Qty in Cart: 0Quantity:Price:$7.95Subtotal: -
COMETIC Exhaust Gasket EX008042AM
COMETIC
$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 under extreme temperatures and over-torque conditions,...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
$7.95Qty in Cart: 0Quantity:Price:$7.95Subtotal: -
COMETIC Exhaust Gasket EX651
COMETIC
$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 heat-resistant material to maintain a perfect seal under...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
$11.95Qty in Cart: 0Quantity:Price:$11.95Subtotal: -
COMETIC Exhaust Gasket - Kawasaki EX693064AM
COMETIC
$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 Kawasaki 4-stroke engine maintains peak combustion...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
$4.95Qty in Cart: 0Quantity:Price:$4.95Subtotal: -
COMETIC Exhaust Gasket - Suzuki EX877
COMETIC
$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 is engineered to seal under the extreme thermal cycling...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
$8.95Qty in Cart: 0Quantity:Price:$8.95Subtotal:
