Dirt Bike Engine
Dirt Bike Engine Parts at JJ Motorsports
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts to keep your engine running at peak efficiency on the track or trails.
Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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MOOSE RACING Gasket set with oil seal - YZ65 8110008
MOOSE RACING
$73.20A complete engine and transmission rebuild demands precision-fit components that won't compromise your reliability. MOOSE RACING's gasket and oil seal set delivers OEM-quality replacement parts at a fraction of the cost, allowing you to restore your YZ65...09346582- SKU:
- 09346582
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$73.20 -
On Sale
ATHENA Water Pump Gasket Kit - Kawasaki P400250475014
ATHENA
MSRP: $47.95Now: $43.00Was: $47.95Coolant leaks and oil seepage compromise engine reliability and performance—two things you can't afford to ignore on the track or in your build. The ATHENA Water Pump Gasket Kit addresses these critical sealing points with OEM-quality gaskets and seals...09346062- SKU:
- 09346062
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- TYPE:
- WATER PUMP
- UNITS:
- KIT
MSRP: $47.95Now: $43.00Was: $47.95Qty in Cart: 0Quantity:Price:MSRP: $47.95Now: $43.00Was: $47.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit - Kawasaki P400250475013
ATHENA
MSRP: $27.95Now: $25.00Was: $27.95Proper gasket and seal integrity is critical to maintaining coolant circulation and preventing oil contamination in your Kawasaki engine. The ATHENA Water Pump Gasket Kit delivers OEM-equivalent sealing performance with quality materials designed to...09346061- SKU:
- 09346061
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $27.95Now: $25.00Was: $27.95 -
On Sale
ATHENA Water Pump Gasket Kit - Kawasaki P400250475010
ATHENA
MSRP: $61.95Now: $56.00Was: $61.95Kawasaki water pump gaskets deteriorate with heat cycles and mileage, leading to coolant leaks that compromise engine temperature regulation and risking overheating. The ATHENA Water Pump Gasket Kit provides OEM-equivalent sealing surfaces and shaft oil...09346058- SKU:
- 09346058
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $61.95Now: $56.00Was: $61.95Qty in Cart: 0Quantity:Price:MSRP: $61.95Now: $56.00Was: $61.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit - Kawasaki P400250475008
ATHENA
MSRP: $50.95Now: $46.00Was: $50.95Gasket and seal failures are a common source of coolant leaks and oil seepage in high-performance Kawasaki engines—problems that can quickly escalate into catastrophic engine damage if left unaddressed. The ATHENA Water Pump Gasket Kit consolidates all...09346056- SKU:
- 09346056
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $50.95Now: $46.00Was: $50.95 -
On Sale
ATHENA Water Pump Gasket Kit - Kawasaki P400250475007
ATHENA
MSRP: $60.95Now: $55.00Was: $60.95Water pump gasket failure is one of the most common culprits behind coolant leaks and engine overheating in high-performance applications. The ATHENA Water Pump Gasket Kit delivers OEM-quality sealing surfaces with precision-engineered gaskets and shaft...09346055- SKU:
- 09346055
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- TYPE:
- WATER PUMP
MSRP: $60.95Now: $55.00Was: $60.95 -
On Sale
ATHENA Water Pump Gasket Kit - Kawasaki P400250475006
ATHENA
MSRP: $50.95Now: $46.00Was: $50.95Water pump gasket failure is one of the most common culprits behind coolant leaks and engine overheating, especially in high-performance applications where thermal stress is constant. The ATHENA Water Pump Gasket Kit gives you everything needed to...09346054- SKU:
- 09346054
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $50.95Now: $46.00Was: $50.95 -
On Sale
ATHENA Water Pump Gasket Kit - Kawasaki P400250475005
ATHENA
MSRP: $42.95Now: $39.00Was: $42.95Seal leaks before they start. The ATHENA Water Pump Gasket Kit provides all the critical gaskets and seals needed to maintain a watertight engine and prevent coolant loss that compromises performance and reliability. Whether you're rebuilding after...09346053- SKU:
- 09346053
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
MSRP: $42.95Now: $39.00Was: $42.95 -
On Sale
ATHENA Water Pump Gasket Kit - Kawasaki P400250475003
ATHENA
MSRP: $28.95Now: $26.00Was: $28.95Water pump gasket failure is a common culprit behind coolant leaks and engine overheating on high-performance Kawasaki engines. This OEM-equivalent kit provides all the gaskets and seals needed to restore a watertight seal, eliminating leaks that can...09346051- SKU:
- 09346051
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $28.95Now: $26.00Was: $28.95 -
On Sale
ATHENA Water Pump Gasket Kit - Kawasaki P400250475002
ATHENA
MSRP: $40.95Now: $37.00Was: $40.95A failing water pump gasket kit compromises your cooling system's integrity, leading to coolant leaks, overheating, and potential engine damage. The ATHENA Water Pump Gasket Kit restores a complete seal across critical pump and clutch cover interfaces,...09346050- SKU:
- 09346050
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
MSRP: $40.95Now: $37.00Was: $40.95 -
On Sale
ATHENA Water Pump Gasket Kit - Kawasaki P400250475001
ATHENA
MSRP: $40.95Now: $37.00Was: $40.95Water pump gasket failure is one of the most common causes of coolant leaks in Kawasaki engines, often going unnoticed until serious overheating occurs. This OEM gasket kit from ATHENA gives you all the sealing components needed for a complete water pump...09346049- SKU:
- 09346049
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $40.95Now: $37.00Was: $40.95 -
On Sale
ATHENA Complete Gasket Kit - Honda P400210850318
ATHENA
MSRP: $172.95Now: $156.00Was: $172.95A failed gasket can sideline your engine and compromise reliability when you need it most. The ATHENA Complete Gasket Kit delivers OEM-quality sealing across all critical surfaces, engineered with high-temperature materials and precision construction to...09345913- SKU:
- 09345913
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $172.95Now: $156.00Was: $172.95Qty in Cart: 0Quantity:Price:MSRP: $172.95Now: $156.00Was: $172.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Husqvarna P400270900083
ATHENA
MSRP: $210.95Now: $190.00Was: $210.95A complete gasket kit is essential for maintaining a reliable seal across all critical engine surfaces—especially when running high temperatures or pushing performance limits. The ATHENA P400270900083 combines proven gasket materials with precision...09345469- SKU:
- 09345469
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $210.95Now: $190.00Was: $210.95Qty in Cart: 0Quantity:Price:MSRP: $210.95Now: $190.00Was: $210.95Subtotal: -
HELIX Gasket Material - 14.5" x 30" 403-5012
HELIX
$34.95A quality gasket material is foundational to any reliable engine or powersports build—it's the seal between catastrophic leaks and a tight, performing system. The HELIX 403-5012 delivers consistent, durable sealing across oil, fuel, coolant, and exhaust...09344769- SKU:
- 09344769
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MATERIAL:
- NITRILE RUBBER
- RIDING STYLE:
- ATV
- THICKNESS METRIC:
- 0.81 MM
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- THICKNESS:
- 0,81 MM (0,032')
- PRODUCT NAME:
- GASKET MATERIAL
- RIDING STYLE:
- STREET
- RIDING STYLE:
- WATERCRAFT
- THICKNESS IMPERIAL:
- 0,032'
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- TYPE:
- BULK
$34.95 -
On Sale
ATHENA Gasket Kit - RMZ250 P400510160018
ATHENA
MSRP: $67.95Now: $61.00Was: $67.95Suzuki RMZ250 riders pushing hard on the track demand a gasket kit that matches their intensity—one engineered to handle sustained heat and combustion pressures without compromise. The ATHENA Gasket Kit pairs precision-machined components with advanced...09344758- SKU:
- 09344758
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE:
- 88,00 MM
- BORE SIZE METRIC:
- 88.00 MM
- DISPLACEMENT:
- 290 CC
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
MSRP: $67.95Now: $61.00Was: $67.95Qty in Cart: 0Quantity:Price:MSRP: $67.95Now: $61.00Was: $67.95Subtotal: -
COMETIC Stator Gasket - Kawasaki EC904032AFM
COMETIC
$17.95Stator cover gasket failures lead to oil leaks, increased service downtime, and potential engine damage—especially in high-performance applications where sealing surfaces are compromised. The COMETIC Stator Gasket eliminates the frustration of stuck...09344504- SKU:
- 09344504
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- TYPE:
- STATOR COVER
- UNITS:
- EACH
$17.95 -
COMETIC Clutch Gasket - Honda EC901032AFM
COMETIC
$18.95A quality clutch gasket is essential to prevent oil weeping and maintain a reliable seal under the thermal stress of racing and high-performance driving. The COMETIC Clutch Gasket eliminates the need for messy sealants and time-consuming re-torquing,...09344503- SKU:
- 09344503
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- MODEL:
- HI-PERFORMANCE
- THICKNESS IMPERIAL:
- 0,032'
- PRODUCT NAME:
- GASKET
$18.95 -
COMETIC Clutch Gasket - Kawasaki EC847060AFM
COMETIC
$14.95A quality clutch gasket is critical to preventing oil weep and maintaining a reliable seal under high operating temperatures. The COMETIC EC847060AFM uses an AFM composite construction—chemically blown nitrile synthetic rubber bonded to an aluminum...09344500- SKU:
- 09344500
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- MODEL:
- HI-PERFORMANCE
$14.95Qty in Cart: 0Quantity:Price:$14.95Subtotal: -
COMETIC Clutch Gasket - Honda EC619032AFM
COMETIC
$15.95Clutch cover gasket failures lead to oil weeping, loss of torque retention, and costly downtime between rebuilds. The COMETIC EC619032AFM eliminates these headaches with an aluminum-core AFM material engineered to seal reliably under sustained heat and...09344482- SKU:
- 09344482
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- TYPE:
- CLUTCH COVER
$15.95Qty in Cart: 0Quantity:Price:$15.95Subtotal: -
COMETIC Stator Gasket - Honda EC586032AFM
COMETIC
$9.95A quality stator cover gasket is critical to preventing oil seepage and maintaining engine integrity during high-RPM operation. The COMETIC Stator Gasket eliminates the frustration of repetitive gasket failure and time-consuming removal procedures,...09344477- SKU:
- 09344477
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STATOR COVER
- UNITS:
- EACH
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
$9.95Qty in Cart: 0Quantity:Price:$9.95Subtotal:
