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Dirt Bike Engine

Dirt Bike Engine

Dirt Bike Engine

Discover a full range of dirt bike engine components for rebuilding or upgrading your performance. 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.

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • PROX Top End Gasket Set - Suzuki 35.3001

    PROX Top End Gasket Set - Suzuki 35.3001

    PROX

    $19.95
    PROX Top End Gasket Set Suzuki 35.3001PROX Top End Gasket Set - Suzuki
    09347135
    SKU:
    09347135
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    PRODUCT NAME:
    GASKET SET
    RIDING STYLE:
    ATV
    TYPE:
    TOP END
    UNITS:
    SET
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • PROX Top End Gasket Set - Kawasaki 35.4317

    PROX Top End Gasket Set - Kawasaki 35.4317

    PROX

    $79.95
    PROX Top End Gasket Set Kawasaki 35.4317PROX Top End Gasket Set - Kawasaki
    09347138
    SKU:
    09347138
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    PRODUCT NAME:
    GASKET SET
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    UNITS:
    SET
    Qty in Cart: 0
    Quantity:
    Price:
    $79.95
    Subtotal:
  • PROX Top End Gasket Set - Kawasaki 35.4426

    PROX Top End Gasket Set - Kawasaki 35.4426

    PROX

    $94.95
    PROX Top End Gasket Set Kawasaki 35.4426PROX Top End Gasket Set - Kawasaki
    09347139
    SKU:
    09347139
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    PRODUCT NAME:
    GASKET SET
    UNITS:
    SET
    $94.95
    Qty in Cart: 0
    Quantity:
    Price:
    $94.95
    Subtotal:
  • On Sale
    PROX Top End Gasket Set - Sea Doo 35.5508

    PROX Top End Gasket Set - Sea Doo 35.5508

    PROX

    MSRP: $82.53
    Now: $53.00
    Was: $82.53
    PROX Top End Gasket Set Sea Doo 35.5508PROX Top End Gasket Set - Sea Doo
    09347143
    SKU:
    09347143
    Availability:
    Ships Same Business Day
    Weight:
    0.01 LBS
    PRODUCT NAME:
    GASKET SET
    RIDING STYLE:
    WATERCRAFT
    TYPE:
    TOP END
    UNITS:
    SET
    MSRP: $82.53
    Now: $53.00
    Was: $82.53
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $82.53
    Now: $53.00
    Was: $82.53
    Subtotal:
  • On Sale
    PROX Top End Gasket Set - Sea Doo 35.5510

    PROX Top End Gasket Set - Sea Doo 35.5510

    PROX

    MSRP: $82.53
    Now: $53.00
    Was: $82.53
    PROX Top End Gasket Set Sea Doo 35.5510PROX Top End Gasket Set - Sea Doo
    09347144
    SKU:
    09347144
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    PRODUCT NAME:
    GASKET SET
    RIDING STYLE:
    WATERCRAFT
    UNITS:
    SET
    TYPE:
    TOP END
    MSRP: $82.53
    Now: $53.00
    Was: $82.53
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $82.53
    Now: $53.00
    Was: $82.53
    Subtotal:
  • On Sale
    PROX Top End Gasket Set - Sea Doo 35.5512

    PROX Top End Gasket Set - Sea Doo 35.5512

    PROX

    MSRP: $112.68
    Now: $72.00
    Was: $112.68
    PROX Top End Gasket Set Sea Doo 35.5512PROX Top End Gasket Set - Sea Doo
    09347145
    SKU:
    09347145
    Availability:
    Ships Same Business Day
    Weight:
    0.35 LBS
    RIDING STYLE:
    WATERCRAFT
    UNITS:
    SET
    PRODUCT NAME:
    GASKET SET
    TYPE:
    TOP END
    MSRP: $112.68
    Now: $72.00
    Was: $112.68
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $112.68
    Now: $72.00
    Was: $112.68
    Subtotal:
  • PROX Top End Gasket Set 35.6118

    PROX Top End Gasket Set 35.6118

    PROX

    $34.95
    PROX Top End Gasket Set 35.6118PROX Top End Gasket Set
    09347146
    SKU:
    09347146
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    UNITS:
    SET
    PRODUCT NAME:
    GASKET SET
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    $34.95
    Qty in Cart: 0
    Quantity:
    Price:
    $34.95
    Subtotal:
  • PROX Top End Gasket Set 35.6315

    PROX Top End Gasket Set 35.6315

    PROX

    $84.95
    PROX Top End Gasket Set 35.6315PROX Top End Gasket Set
    09347148
    SKU:
    09347148
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    UNITS:
    SET
    PRODUCT NAME:
    GASKET SET
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    $84.95
    Qty in Cart: 0
    Quantity:
    Price:
    $84.95
    Subtotal:
  • PROX Top End Gasket Set 35.6316 PROX Top End Gasket Set 35.6316

    PROX Top End Gasket Set 35.6316

    PROX

    $84.95
    PROX Top End Gasket Set 35.6316PROX Top End Gasket Set
    09347149
    SKU:
    09347149
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    UNITS:
    SET
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    PRODUCT NAME:
    GASKET SET
    $84.95
    Qty in Cart: 0
    Quantity:
    Price:
    $84.95
    Subtotal:
  • PROX Top End Gasket Set 35.6317

    PROX Top End Gasket Set 35.6317

    PROX

    $69.95
    PROX Top End Gasket Set 35.6317PROX Top End Gasket Set
    09347150
    SKU:
    09347150
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    PRODUCT NAME:
    GASKET SET
    UNITS:
    SET
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    $69.95
    Qty in Cart: 0
    Quantity:
    Price:
    $69.95
    Subtotal:
  • PROX Intake Valve and Spring Kit 28.SIS1340-2

    PROX Intake Valve and Spring Kit 28.SIS1340-2

    PROX

    $149.95
    PROX Intake Valve and Spring Kit 28.SIS1340-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs...
    09262892
    SKU:
    09262892
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    PRODUCT NAME:
    VALVE AND SPRING KIT
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SES2414-1

    PROX Valve and Spring Kit 28.SES2414-1

    PROX

    $149.95
    PROX Valve and Spring Kit 28.SES2414-1Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...
    09262724
    SKU:
    09262724
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    VALVE AND SPRING KIT
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    VALVE
    UNITS:
    KIT
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SES2444-1

    PROX Valve and Spring Kit 28.SES2444-1

    PROX

    $159.95
    PROX Valve and Spring Kit 28.SES2444-1Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...
    09262725
    SKU:
    09262725
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    SPRING KIT
    UNITS:
    KIT
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    VALVE
    $159.95
    Qty in Cart: 0
    Quantity:
    Price:
    $159.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SES6351-1

    PROX Valve and Spring Kit 28.SES6351-1

    PROX

    $149.95
    PROX Valve and Spring Kit 28.SES6351-1Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...
    09262726
    SKU:
    09262726
    Availability:
    Ships Same Business Day
    Weight:
    0.35 LBS
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    SPRING KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    MATERIAL:
    STEEL
    TYPE:
    VALVE
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SES6353-1

    PROX Valve and Spring Kit 28.SES6353-1

    PROX

    $149.95
    PROX Valve and Spring Kit 28.SES6353-1Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...
    09262727
    SKU:
    09262727
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    VALVE
    UNITS:
    KIT
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    SPRING KIT
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS2414-2

    PROX Valve and Spring Kit 28.SIS2414-2

    PROX

    $149.95
    PROX Valve and Spring Kit 28.SIS2414-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...
    09262728
    SKU:
    09262728
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    VALVE
    PRODUCT NAME:
    VALVE AND SPRING KIT
    UNITS:
    KIT
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS2444-2

    PROX Valve and Spring Kit 28.SIS2444-2

    PROX

    $159.95
    PROX Valve and Spring Kit 28.SIS2444-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...
    09262729
    SKU:
    09262729
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    VALVE
    PRODUCT NAME:
    VALVE AND SPRING KIT
    UNITS:
    KIT
    $159.95
    Qty in Cart: 0
    Quantity:
    Price:
    $159.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS6351-2

    PROX Valve and Spring Kit 28.SIS6351-2

    PROX

    $149.95
    PROX Valve and Spring Kit 28.SIS6351-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...
    09262730
    SKU:
    09262730
    Availability:
    Ships Same Business Day
    Weight:
    0.35 LBS
    PRODUCT NAME:
    VALVE AND SPRING KIT
    APPLICATION:
    INTAKE
    TYPE:
    VALVE
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Valve and Spring Kit 28.SIS6353-2

    PROX Valve and Spring Kit 28.SIS6353-2

    PROX

    $149.95
    PROX Valve and Spring Kit 28.SIS6353-2Replaces the OEM valves and valve springs, Steel, nitrided valves for increased durability and less wear under extreme conditions, Stronger valve springs deal with the extra weight of the steel valves, Springs are...
    09262731
    SKU:
    09262731
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    TYPE:
    VALVE
    PRODUCT NAME:
    VALVE AND SPRING KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    $149.95
    Subtotal:
  • PROX Exhaust Valve 28.1334-1

    PROX Exhaust Valve 28.1334-1

    PROX

    $39.95
    PROX Exhaust Valve 28.1334-1Manufactured to the highest precision and quality, Constructed to meet OEM specifications, Available in standard sizes only
    09260143
    SKU:
    09260143
    Availability:
    Ships Same Business Day
    Weight:
    0.08 LBS
    PRODUCT NAME:
    VALVE
    UNITS:
    EACH
    MATERIAL:
    STEEL
    RIDING STYLE:
    OFF-ROAD
    APPLICATION:
    EXHAUST
    $39.95
    Qty in Cart: 0
    Quantity:
    Price:
    $39.95
    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!