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Dirt Bike Engine

Dirt Bike Engine

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 Race Gasket Kit - Kawasaki R2506-065

    ATHENA Race Gasket Kit - Kawasaki R2506-065

    ATHENA

    MSRP: $44.95
    Now: $40.00
    Was: $44.95
    Whether 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: $44.95
    Now: $40.00
    Was: $44.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $44.95
    Now: $40.00
    Was: $44.95
    Subtotal:
  • On Sale
    ATHENA Race Gasket Kit - Kawasaki R2506-066

    ATHENA Race Gasket Kit - Kawasaki R2506-066

    ATHENA

    MSRP: $53.95
    Now: $49.00
    Was: $53.95
    Engine 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: $53.95
    Now: $49.00
    Was: $53.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $53.95
    Now: $49.00
    Was: $53.95
    Subtotal:
  • On Sale
    ATHENA Complete Gasket Kit - Kawasaki P400250900066

    ATHENA Complete Gasket Kit - Kawasaki P400250900066

    ATHENA

    MSRP: $268.95
    Now: $242.00
    Was: $268.95
    Whether 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: $268.95
    Now: $242.00
    Was: $268.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $268.95
    Now: $242.00
    Was: $268.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - Honda P400210475001

    ATHENA Water Pump Gasket Kit - Honda P400210475001

    ATHENA

    MSRP: $37.95
    Now: $34.00
    Was: $37.95
    A 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: $37.95
    Now: $34.00
    Was: $37.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $37.95
    Now: $34.00
    Was: $37.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - Honda P400210475002

    ATHENA Water Pump Gasket Kit - Honda P400210475002

    ATHENA

    MSRP: $33.95
    Now: $31.00
    Was: $33.95
    Cooling 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: $33.95
    Now: $31.00
    Was: $33.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $33.95
    Now: $31.00
    Was: $33.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - Honda P400210475003

    ATHENA Water Pump Gasket Kit - Honda P400210475003

    ATHENA

    MSRP: $27.95
    Now: $25.00
    Was: $27.95
    Cooling 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: $27.95
    Now: $25.00
    Was: $27.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $27.95
    Now: $25.00
    Was: $27.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - Honda P400210475004

    ATHENA Water Pump Gasket Kit - Honda P400210475004

    ATHENA

    MSRP: $33.95
    Now: $31.00
    Was: $33.95
    A 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: $33.95
    Now: $31.00
    Was: $33.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $33.95
    Now: $31.00
    Was: $33.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - Honda P400210475005

    ATHENA Water Pump Gasket Kit - Honda P400210475005

    ATHENA

    MSRP: $30.95
    Now: $28.00
    Was: $30.95
    Water 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: $30.95
    Now: $28.00
    Was: $30.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $30.95
    Now: $28.00
    Was: $30.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - Honda P400210475006

    ATHENA Water Pump Gasket Kit - Honda P400210475006

    ATHENA

    MSRP: $31.95
    Now: $29.00
    Was: $31.95
    A 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: $31.95
    Now: $29.00
    Was: $31.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $31.95
    Now: $29.00
    Was: $31.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - Honda P400210475007

    ATHENA Water Pump Gasket Kit - Honda P400210475007

    ATHENA

    MSRP: $31.95
    Now: $29.00
    Was: $31.95
    Cooling 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: $31.95
    Now: $29.00
    Was: $31.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $31.95
    Now: $29.00
    Was: $31.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - Honda P400210475009

    ATHENA Water Pump Gasket Kit - Honda P400210475009

    ATHENA

    MSRP: $33.95
    Now: $31.00
    Was: $33.95
    A failing water pump gasket can silently compromise your cooling system, leading to overheating and catastrophic engine damage. The ATHENA Water Pump Gasket Kit gives you all the critical sealing components needed for a complete, reliable water pump...
    09346045
    SKU:
    09346045
    Availability:
    Ships Same Business Day
    Weight:
    0.26 LBS
    PRODUCT NAME:
    GASKET KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    TYPE:
    WATER PUMP
    MSRP: $33.95
    Now: $31.00
    Was: $33.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $33.95
    Now: $31.00
    Was: $33.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - Honda P400210475010

    ATHENA Water Pump Gasket Kit - Honda P400210475010

    ATHENA

    MSRP: $26.95
    Now: $24.00
    Was: $26.95
    A 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: $26.95
    Now: $24.00
    Was: $26.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $26.95
    Now: $24.00
    Was: $26.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - Honda P400210475011

    ATHENA Water Pump Gasket Kit - Honda P400210475011

    ATHENA

    MSRP: $33.95
    Now: $31.00
    Was: $33.95
    A failing water pump gasket compromises your engine's cooling system and risks catastrophic overheating. This complete gasket kit from ATHENA supplies all the critical seals and washers needed for a thorough water pump rebuild, restoring proper coolant...
    09346047
    SKU:
    09346047
    Availability:
    Ships Same Business Day
    Weight:
    0.31 LBS
    TYPE:
    WATER PUMP
    PRODUCT NAME:
    GASKET KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    MSRP: $33.95
    Now: $31.00
    Was: $33.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $33.95
    Now: $31.00
    Was: $33.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - KTM P400270475002

    ATHENA Water Pump Gasket Kit - KTM P400270475002

    ATHENA

    MSRP: $24.95
    Now: $22.00
    Was: $24.95
    Cooling 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: $24.95
    Now: $22.00
    Was: $24.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $24.95
    Now: $22.00
    Was: $24.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - KTM P400270475003

    ATHENA Water Pump Gasket Kit - KTM P400270475003

    ATHENA

    MSRP: $34.95
    Now: $31.00
    Was: $34.95
    A 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: $34.95
    Now: $31.00
    Was: $34.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $34.95
    Now: $31.00
    Was: $34.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - KTM P400270475004

    ATHENA Water Pump Gasket Kit - KTM P400270475004

    ATHENA

    MSRP: $25.95
    Now: $23.00
    Was: $25.95
    Cooling 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: $25.95
    Now: $23.00
    Was: $25.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $25.95
    Now: $23.00
    Was: $25.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - KTM P400270475005

    ATHENA Water Pump Gasket Kit - KTM P400270475005

    ATHENA

    MSRP: $38.95
    Now: $35.00
    Was: $38.95
    Coolant 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: $38.95
    Now: $35.00
    Was: $38.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $38.95
    Now: $35.00
    Was: $38.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - KTM P400270475006

    ATHENA Water Pump Gasket Kit - KTM P400270475006

    ATHENA

    MSRP: $46.95
    Now: $42.00
    Was: $46.95
    A leaking water pump doesn't just cost you performance—it costs you reliability and track time. The ATHENA Water Pump Gasket Kit delivers OEM-equivalent sealing without the dealer markup, giving you the gaskets and seals needed to eliminate coolant loss...
    09346068
    SKU:
    09346068
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    PRODUCT NAME:
    GASKET KIT
    TYPE:
    WATER PUMP
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    MSRP: $46.95
    Now: $42.00
    Was: $46.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $46.95
    Now: $42.00
    Was: $46.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - KTM P400270475007

    ATHENA Water Pump Gasket Kit - KTM P400270475007

    ATHENA

    MSRP: $39.95
    Now: $36.00
    Was: $39.95
    Proper 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: $39.95
    Now: $36.00
    Was: $39.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $39.95
    Now: $36.00
    Was: $39.95
    Subtotal:
  • On Sale
    ATHENA Water Pump Gasket Kit - KTM P400270475008

    ATHENA Water Pump Gasket Kit - KTM P400270475008

    ATHENA

    MSRP: $47.95
    Now: $43.00
    Was: $47.95
    Proper gasket sealing is critical to preventing coolant leaks and maintaining engine integrity on your KTM. This comprehensive ATHENA gasket kit provides all the OEM-equivalent sealing components needed for water pump service, ensuring reliable thermal...
    09346070
    SKU:
    09346070
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    PRODUCT NAME:
    GASKET KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    TYPE:
    WATER PUMP
    MSRP: $47.95
    Now: $43.00
    Was: $47.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $47.95
    Now: $43.00
    Was: $47.95
    Subtotal:
  • Total: items /

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Dirt Bike Engine Parts

Keep your dirt bike running smoothly and prolong the life of its engine with essential general maintenance. But when parts start to break down, don't let it stop you from getting out on the trails! JJ Motorsports has all that you need for minor jobs like oil changes or major overhauls such as a complete rebuild - carrying top aftermarket brands . Get back in gear faster by shopping our full line of high-quality dirt bike engine parts here today at JJ Motorsports!

 

At JJ Motorsports, we want to make sure you don't miss out on the ride! If your motor has blown or radiator smashed, our gearheads can help get you back in the seat. We carry piston kits from top brands like Wiseco and Wrench Rabbit engine kits so that riders have access to a wide range of parts for their dirt bike engine rebuilds. Plus – with gaskets at-the-ready when it comes time for any leakages - no need to worry about maintenance issues either; simply stay up on oil & filter changes and let us take care of everything else. Got queries? Just give one of our knowledgeable staff members a call at 1-231‐767‐5055 where they'll be more than happy provide advice, instructions and tailored answers catered just for YOU!

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

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