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
-
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: $98.95 -
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 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 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 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 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: $33.95 -
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 P400210475007
ATHENA
MSRP: $31.95Now: $29.00Was: $31.95Cooling system leaks waste time and money—they sideline your engine before you hit peak performance. The ATHENA Water Pump Gasket Kit delivers OEM-quality sealing components designed to eliminate weeping and blowouts on your Honda platform. With...09346043- SKU:
- 09346043
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- WATER PUMP
MSRP: $31.95Now: $29.00Was: $31.95 -
On Sale
ATHENA Water Pump Gasket Kit - Honda P400210475010
ATHENA
MSRP: $26.95Now: $24.00Was: $26.95A failing water pump gasket can compromise your entire cooling system, leading to costly overheating and engine damage. The ATHENA Water Pump Gasket Kit delivers OEM-quality sealing across all critical contact points, ensuring reliable coolant...09346046- SKU:
- 09346046
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $26.95Now: $24.00Was: $26.95 -
On Sale
ATHENA Water Pump Gasket Kit - KTM P400270475002
ATHENA
MSRP: $24.95Now: $22.00Was: $24.95Cooling system leaks compromise engine performance and reliability, making a quality gasket kit essential for any rebuild or maintenance interval. The ATHENA Water Pump Gasket Kit delivers OEM-equivalent sealing across critical engine interfaces,...09346064- SKU:
- 09346064
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $24.95Now: $22.00Was: $24.95 -
On Sale
ATHENA Water Pump Gasket Kit - KTM P400270475003
ATHENA
MSRP: $34.95Now: $31.00Was: $34.95A failing water pump gasket doesn't just leak—it compromises your engine's cooling system and can lead to catastrophic overheating during critical race sessions or trail rides. The ATHENA Water Pump Gasket Kit delivers OEM-quality sealing components...09346065- SKU:
- 09346065
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $34.95Now: $31.00Was: $34.95 -
On Sale
ATHENA Water Pump Gasket Kit - KTM P400270475004
ATHENA
MSRP: $25.95Now: $23.00Was: $25.95Cooling system integrity is non-negotiable in high-performance applications—a failed water pump gasket means catastrophic overheating and potential engine damage. The ATHENA Water Pump Gasket Kit delivers OEM-equivalent sealing with all the supporting...09346066- SKU:
- 09346066
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
MSRP: $25.95Now: $23.00Was: $25.95 -
On Sale
ATHENA Water Pump Gasket Kit - KTM P400270475005
ATHENA
MSRP: $38.95Now: $35.00Was: $38.95Coolant leaks and seal failures don't just waste fluid—they compromise engine temperature regulation and can lead to catastrophic overheating. The ATHENA Water Pump Gasket Kit delivers OEM-quality sealing surfaces across all critical junction points,...09346067- SKU:
- 09346067
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
MSRP: $38.95Now: $35.00Was: $38.95 -
On Sale
ATHENA Water Pump Gasket Kit - KTM P400270475007
ATHENA
MSRP: $39.95Now: $36.00Was: $39.95Proper sealing is critical to engine longevity, and factory gaskets degrade with thermal cycling and age. The ATHENA Water Pump Gasket Kit delivers OEM-quality sealing surfaces to prevent coolant leaks and oil weeping that compromise performance and...09346069- SKU:
- 09346069
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
MSRP: $39.95Now: $36.00Was: $39.95 -
On Sale
ATHENA Water Pump Gasket Kit - KTM P400270475011
ATHENA
MSRP: $48.95Now: $44.00Was: $48.95Seal leaks at the source with ATHENA's precision-engineered gasket kit, engineered to eliminate coolant and oil seepage that compromise engine reliability and performance. Whether you're rebuilding after a full teardown or performing preventive...09346073- SKU:
- 09346073
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $48.95Now: $44.00Was: $48.95
