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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On Sale
ATHENA Complete Gasket Kit - Husqvarna P400270900078
ATHENA
MSRP: $182.95Now: $165.00Was: $182.95Gasket failure is one of the most common culprits behind coolant leaks, compression loss, and catastrophic engine damage—especially under high heat and boost conditions. The ATHENA Complete Gasket Kit delivers factory-grade sealing integrity with...09345472- SKU:
- 09345472
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $182.95Now: $165.00Was: $182.95 -
On Sale
ATHENA Race Gasket Kit - Husqvarna R2706-079
ATHENA
MSRP: $57.95Now: $52.00Was: $57.95Factory gasket seals degrade under sustained high-temperature racing conditions, leading to compression loss and potential engine damage. The ATHENA Race Gasket Kit delivers the thermal stability and spring-back retention required for consistent...09345474- SKU:
- 09345474
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
MSRP: $57.95Now: $52.00Was: $57.95 -
On Sale
ATHENA Top End Gasket Kit - Husqvarna P400270600079
ATHENA
MSRP: $129.95Now: $117.00Was: $129.95Head gasket failure can strand you trackside or leave your engine compromised. The ATHENA Top End Gasket Kit delivers dependable sealing across extreme temperature swings, ensuring your Husqvarna P400 engine maintains compression and performance when it...09345475- SKU:
- 09345475
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $129.95Now: $117.00Was: $129.95 -
On Sale
ATHENA Race Gasket Kit - Husqvarna R2706-081
ATHENA
MSRP: $67.95Now: $61.00Was: $67.95Head gasket failure can end your race day before it starts—and the ATHENA Race Gasket Kit R2706-081 is engineered to prevent that. Built with rubber-coated spring steel construction and high-temperature silicone beading on critical sealing surfaces, this...09345478- SKU:
- 09345478
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
MSRP: $67.95Now: $61.00Was: $67.95 -
On Sale
ATHENA Top End Gasket Kit - Husqvarna P400270600081
ATHENA
MSRP: $98.95Now: $89.00Was: $98.95Head gasket failure can cost you races and credibility. The ATHENA Top End Gasket Kit is engineered to maintain a perfect seal under extreme combustion pressures and thermal cycling, ensuring your Husqvarna P400 engine performs reliably race after race...09345479- SKU:
- 09345479
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $98.95Now: $89.00Was: $98.95Qty in Cart: 0Quantity:Price:MSRP: $98.95Now: $89.00Was: $98.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Husqvarna P400270900081
ATHENA
MSRP: $188.95Now: $170.00Was: $188.95A complete gasket kit is the foundation of a reliable engine—seal failure leads to oil leaks, compression loss, and catastrophic damage. The ATHENA Complete Gasket Kit for your Husqvarna P400270900081 combines high-strength materials with precision...09345480- SKU:
- 09345480
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
MSRP: $188.95Now: $170.00Was: $188.95 -
On Sale
ATHENA Top End Gasket Kit - Kawasaki P400250600067
ATHENA
MSRP: $87.95Now: $79.00Was: $87.95Head gasket failure means downtime and costly engine damage—especially when you're pushing performance limits. The ATHENA Top End Gasket Kit delivers reliable sealing across extreme temperature swings and high combustion pressures, so you can focus on...09345484- SKU:
- 09345484
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $87.95Now: $79.00Was: $87.95Qty in Cart: 0Quantity:Price:MSRP: $87.95Now: $79.00Was: $87.95Subtotal: -
On Sale
ATHENA Complete Gasket Kit - Kawasaki P400250900067
ATHENA
MSRP: $245.95Now: $221.00Was: $245.95Gasket failure leads to compression loss, coolant leaks, and catastrophic engine damage—especially under high RPM or forced induction loads. The ATHENA Complete Gasket Kit eliminates these risks with multi-layer construction and precision engineering...09345485- SKU:
- 09345485
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $245.95Now: $221.00Was: $245.95 -
On Sale
ATHENA Complete Gasket Kit - Suzuki P400510900095
ATHENA
MSRP: $246.95Now: $222.00Was: $246.95Gasket failure can compromise your engine's integrity and leave you stranded mid-season. The ATHENA Complete Gasket Kit delivers OEM-equivalent sealing performance with premium materials engineered to handle extreme temperatures and sustained high-RPM...09345488- SKU:
- 09345488
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $246.95Now: $222.00Was: $246.95 -
On Sale
ATHENA Complete Gasket Kit - Suzuki P400510900098
ATHENA
MSRP: $221.95Now: $200.00Was: $221.95Gasket failure can compromise your entire engine's integrity, leading to compression loss, coolant leaks, and catastrophic damage. The ATHENA Complete Gasket Kit is engineered to maintain a reliable seal across all critical engine surfaces, even under...09345489- SKU:
- 09345489
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $221.95Now: $200.00Was: $221.95 -
On Sale
ATHENA Complete Gasket Kit - KTM/Husqvarna P400270160082
ATHENA
MSRP: $71.95Now: $65.00Was: $71.95When rebuilding a KTM or Husqvarna top-end, gasket failure isn't an option. This Athena complete gasket kit eliminates guesswork by delivering OEM-quality seals engineered to withstand extreme combustion temperatures and high RPM loads. A single failed...09345491- SKU:
- 09345491
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- ENGINE TYPE:
- -
- UNITS:
- KIT
- BORE SIZE METRIC:
- 82.00 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
MSRP: $71.95Now: $65.00Was: $71.95 -
On Sale
ATHENA Race Gasket Kit - Kawasaki R2506-065
ATHENA
MSRP: $44.95Now: $40.00Was: $44.95Whether you're prepping for race day or executing a mid-season engine refresh, compression ratio directly impacts your engine's power delivery and fuel efficiency. The ATHENA Race Gasket Kit gives you the flexibility to optimize for either standard or...09345863- SKU:
- 09345863
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- RACE
- TYPE:
- TOP END
MSRP: $44.95Now: $40.00Was: $44.95 -
On Sale
ATHENA Race Gasket Kit - Kawasaki R2506-066
ATHENA
MSRP: $53.95Now: $49.00Was: $53.95Engine gasket condition is critical to maintaining compression integrity and preventing mid-race failures. The ATHENA Race Gasket Kit gives you the flexibility to optimize your compression ratio based on fuel choice, whether you're running pump gas at...09345864- SKU:
- 09345864
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- RACE
MSRP: $53.95Now: $49.00Was: $53.95 -
On Sale
ATHENA Complete Gasket Kit - Kawasaki P400250900066
ATHENA
MSRP: $268.95Now: $242.00Was: $268.95Whether you're prepping for race day or executing a mid-season engine refresh, the ATHENA Complete Gasket Kit gives you the flexibility to optimize your compression ratio without a full engine rebuild. The included multi-layer steel head gasket and...09345865- SKU:
- 09345865
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- RACE
MSRP: $268.95Now: $242.00Was: $268.95Qty in Cart: 0Quantity:Price:MSRP: $268.95Now: $242.00Was: $268.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit - Honda P400210475001
ATHENA
MSRP: $37.95Now: $34.00Was: $37.95A failing water pump gasket doesn't just leak—it compromises your engine's cooling efficiency and invites corrosion that spreads throughout your cooling system. The ATHENA Water Pump Gasket Kit gives you all the sealing components necessary for a...09346037- SKU:
- 09346037
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
MSRP: $37.95Now: $34.00Was: $37.95 -
On Sale
ATHENA Water Pump Gasket Kit - Honda P400210475002
ATHENA
MSRP: $33.95Now: $31.00Was: $33.95Cooling system integrity depends on proper sealing, and worn gaskets are a leading cause of coolant leaks and overheating. The ATHENA Water Pump Gasket Kit delivers OEM-equivalent sealing surfaces with precision-cut gasket material and matched oil seals,...09346038- SKU:
- 09346038
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $33.95Now: $31.00Was: $33.95 -
On Sale
ATHENA Water Pump Gasket Kit - Honda P400210475003
ATHENA
MSRP: $27.95Now: $25.00Was: $27.95Cooling system integrity depends on reliable gasket sealing, and worn or compromised gaskets lead to coolant leaks, overheating, and potential engine damage. The ATHENA Water Pump Gasket Kit supplies all the critical sealing components needed to restore...09346039- SKU:
- 09346039
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $27.95Now: $25.00Was: $27.95 -
On Sale
ATHENA Water Pump Gasket Kit - Honda P400210475004
ATHENA
MSRP: $33.95Now: $31.00Was: $33.95A failing water pump gasket doesn't just leak—it compromises your engine's cooling system and can lead to catastrophic overheating. The ATHENA Water Pump Gasket Kit supplies all the critical sealing components needed to restore proper coolant circulation...09346040- SKU:
- 09346040
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $33.95Now: $31.00Was: $33.95Qty in Cart: 0Quantity:Price:MSRP: $33.95Now: $31.00Was: $33.95Subtotal: -
On Sale
ATHENA Water Pump Gasket Kit - Honda P400210475005
ATHENA
MSRP: $30.95Now: $28.00Was: $30.95Water pump gasket failure is one of the most common causes of coolant leaks and engine overheating in Honda applications. This ATHENA gasket kit provides OEM-quality replacements for all critical sealing surfaces, eliminating the need to source...09346041- SKU:
- 09346041
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $30.95Now: $28.00Was: $30.95 -
On Sale
ATHENA Water Pump Gasket Kit - Honda P400210475006
ATHENA
MSRP: $31.95Now: $29.00Was: $31.95A failed water pump gasket doesn't just leak—it compromises your cooling system's ability to regulate engine temperature under sustained load, putting your engine at risk. The ATHENA Water Pump Gasket Kit supplies all the critical sealing components...09346042- SKU:
- 09346042
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
MSRP: $31.95Now: $29.00Was: $31.95
