Dirt Bike Engine

Dirt Bike Engine

Dirt Bike Engine

Explore our selection for dirt bike parts for adding horsepower or reliability to a dirt bike's engine. We feature engine parts from Wiseco, Vertex, and more common engine part manufacturers. Get new pistons and gasket kits for re-freshening engines to withstand any conditions you put your bike through!

  • Product
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  • Price
  • Subtotal
  • KIBBLEWHITE Spring Kit - Steel 80-81700

    KIBBLEWHITE Spring Kit - Steel 80-81700

    KIBBLEWHITE

    $327.95
    KIBBLEWHITE Spring Kit Steel 80-81700Spring kit is designed with increased spring rates and high lift compatibility compared to the stock springs, Compatible with boosted or turbocharged applications, CNC-machined titanium retainers and Cr-Si dual...
    09263206
    SKU:
    09263206
    Availability:
    Ships Same Business Day
    Weight:
    1.25 LBS
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    SPRING OPEN PRESSURE:
    167 LB
    RIDING STYLE:
    UTV
    SPRING LIFT IMPERIAL:
    0.445'
    APPLICATION:
    EXHAUST
    SPRING LIFT:
    0,445'
    TYPE:
    VALVE
    PRODUCT NAME:
    SPRING KIT
    SPRING SEAT PRESSURE:
    53 LB
    UNITS:
    KIT
    $327.95
    Qty in Cart: 0
    Quantity:
    Price:
    $327.95
    Subtotal:
  • KIBBLEWHITE Valve Kit - Sportster 20-22300

    KIBBLEWHITE Valve Kit - Sportster 20-22300

    KIBBLEWHITE

    $103.74
    KIBBLEWHITE Valve Kit Sportster 20-22300Full set of Black Diamond™ stainless steel standard size valves for engine applications listed, All valves are impregnated by a special process to a depth of .002” with a surface buildup of .0002”, This process...
    09263207
    SKU:
    09263207
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    PRODUCT NAME:
    VALVE KIT
    UNITS:
    KIT
    MATERIAL:
    STAINLESS STEEL
    MODEL:
    BLACK DIAMOND™
    RIDING STYLE:
    STREET
    Qty in Cart: 0
    Quantity:
    Price:
    $103.74
    Subtotal:
  • KIBBLEWHITE Complete Valve Kit 20-22350

    KIBBLEWHITE Complete Valve Kit 20-22350

    KIBBLEWHITE

    $216.54
    KIBBLEWHITE Complete Valve Kit 20-22350Kits include KPMI® or equivalent valve spring kit, a full set of Black Diamond™stainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine applications listed,...
    09263208
    SKU:
    09263208
    Availability:
    Ships Same Business Day
    Weight:
    1.75 LBS
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    ENGINE KIT
    SPRING LIFT IMPERIAL:
    0.400'
    SPRING SEAT PRESSURE:
    95 LB
    UNITS:
    KIT
    SPRING OPEN PRESSURE:
    325 LB
    MODEL:
    BLACK DIAMOND™
    RIDING STYLE:
    STREET
    SPRING LIFT:
    0,400'
    $216.54
    Qty in Cart: 0
    Quantity:
    Price:
    $216.54
    Subtotal:
  • KIBBLEWHITE Complete Valve Kit - Evolution 20-22650

    KIBBLEWHITE Complete Valve Kit - Evolution 20-22650

    KIBBLEWHITE

    $235.48
    KIBBLEWHITE Complete Valve Kit Evolution 20-22650Kits include KPMI® or equivalent valve spring kit, a full set of Black Diamond™stainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine applications...
    09263210
    SKU:
    09263210
    Availability:
    Ships Same Business Day
    Weight:
    2.15 LBS
    RIDING STYLE:
    STREET
    SPRING OPEN PRESSURE:
    361 LB
    SPRING LIFT IMPERIAL:
    0.600'
    UNITS:
    KIT
    MODEL:
    BLACK DIAMOND™
    SPRING SEAT PRESSURE:
    163 LB
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    ENGINE KIT
    SPRING LIFT:
    0,600'
    $235.48
    Qty in Cart: 0
    Quantity:
    Price:
    $235.48
    Subtotal:
  • KIBBLEWHITE Valve Kit - Evolution/883 20-22700

    KIBBLEWHITE Valve Kit - Evolution/883 20-22700

    KIBBLEWHITE

    $135.95
    KIBBLEWHITE Valve Kit Evolution/883 20-22700Full set of Black Diamond™ stainless steel standard size valves for engine applications listed, All valves are impregnated by a special process to a depth of .002” with a surface buildup of .0002”, This...
    09263211
    SKU:
    09263211
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    VALVE KIT
    UNITS:
    KIT
    MODEL:
    BLACK DIAMOND™
    RIDING STYLE:
    STREET
    $135.95
    Qty in Cart: 0
    Quantity:
    Price:
    $135.95
    Subtotal:
  • KIBBLEWHITE Complete Valve Kit - Evolution/883 20-22750

    KIBBLEWHITE Complete Valve Kit - Evolution/883 20-22750

    KIBBLEWHITE

    $274.84
    KIBBLEWHITE Complete Valve Kit Evolution/883 20-22750Kits include KPMI® or equivalent valve spring kit, a full set of Black Diamond™stainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine...
    09263212
    SKU:
    09263212
    Availability:
    Ships Same Business Day
    Weight:
    2.05 LBS
    SPRING SEAT PRESSURE:
    163 LB
    UNITS:
    KIT
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    ENGINE KIT
    SPRING OPEN PRESSURE:
    361 LB
    MODEL:
    BLACK DIAMOND™
    RIDING STYLE:
    STREET
    SPRING LIFT:
    0,600'
    SPRING LIFT IMPERIAL:
    0.600'
    $274.84
    Qty in Cart: 0
    Quantity:
    Price:
    $274.84
    Subtotal:
  • KIBBLEWHITE Complete Valve Kit - M8 20-23350

    KIBBLEWHITE Complete Valve Kit - M8 20-23350

    KIBBLEWHITE

    $555.95
    KIBBLEWHITE Complete Valve Kit M8 20-23350Kits include KPMI® or equivalent valve spring kit, a full set of Black Diamond™stainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine applications...
    09263222
    SKU:
    09263222
    Availability:
    Ships Same Business Day
    Weight:
    2.35 LBS
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    ENGINE KIT
    MODEL:
    BLACK DIAMOND™
    RIDING STYLE:
    STREET
    SPRING LIFT:
    0,465'
    SPRING LIFT IMPERIAL:
    0.465'
    SPRING OPEN PRESSURE:
    212 LB
    SPRING SEAT PRESSURE:
    80 IB
    UNITS:
    KIT
    $555.95
    Qty in Cart: 0
    Quantity:
    Price:
    $555.95
    Subtotal:
  • KIBBLEWHITE Cylinder Head Service Kit 30-33430

    KIBBLEWHITE Cylinder Head Service Kit 30-33430

    KIBBLEWHITE

    $451.95
    KIBBLEWHITE Cylinder Head Service Kit 30-33430Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring...
    09263223
    SKU:
    09263223
    Availability:
    Ships Same Business Day
    Weight:
    0.85 LBS
    APPLICATION:
    INTAKE
    MATERIAL:
    C630 BRONZE
    MATERIAL:
    TITANIUM
    MODEL:
    BLACK DIAMOND™
    SPRING SEAT PRESSURE:
    45 LB
    RIDING STYLE:
    OFF-ROAD
    SPRING LIFT IMPERIAL:
    0.350'
    UNITS:
    KIT
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    CYLINDER HEAD SERVICE KIT
    SPRING LIFT:
    0,350'
    SPRING OPEN PRESSURE:
    143 LB
    $451.95
    Qty in Cart: 0
    Quantity:
    Price:
    $451.95
    Subtotal:
  • KIBBLEWHITE Cylinder Head Service Kit 30-33450

    KIBBLEWHITE Cylinder Head Service Kit 30-33450

    KIBBLEWHITE

    $412.95
    KIBBLEWHITE Cylinder Head Service Kit 30-33450Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring...
    09263224
    SKU:
    09263224
    Availability:
    Ships Same Business Day
    Weight:
    1.25 LBS
    APPLICATION:
    EXHAUST
    APPLICATION:
    INTAKE
    SPRING LIFT IMPERIAL:
    0.440'
    SPRING SEAT PRESSURE:
    INTAKE 40 LB, EXHAUST 70 LB
    MATERIAL:
    TITANIUM
    MODEL:
    BLACK DIAMOND™
    PRODUCT NAME:
    CYLINDER HEAD SERVICE KIT
    SPRING LIFT:
    0,440'
    SPRING OPEN PRESSURE:
    INTAKE 147 LB, EXHAUST 203 LB
    MATERIAL:
    C630 BRONZE
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    $412.95
    Qty in Cart: 0
    Quantity:
    Price:
    $412.95
    Subtotal:
  • KIBBLEWHITE Cylinder Head Service Kit 30-33460

    KIBBLEWHITE Cylinder Head Service Kit 30-33460

    KIBBLEWHITE

    $388.95
    KIBBLEWHITE Cylinder Head Service Kit 30-33460Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring...
    09263225
    SKU:
    09263225
    Availability:
    Ships Same Business Day
    Weight:
    2.70 LBS
    APPLICATION:
    EXHAUST
    MATERIAL:
    TITANIUM
    SPRING LIFT:
    0,300'
    MATERIAL:
    C630 BRONZE
    SPRING OPEN PRESSURE:
    157 LB
    UNITS:
    KIT
    APPLICATION:
    INTAKE
    MODEL:
    BLACK DIAMOND™
    PRODUCT NAME:
    CYLINDER HEAD SERVICE KIT
    RIDING STYLE:
    ATV
    SPRING LIFT IMPERIAL:
    0.300'
    SPRING SEAT PRESSURE:
    70 LB
    $388.95
    Qty in Cart: 0
    Quantity:
    Price:
    $388.95
    Subtotal:
  • KIBBLEWHITE Cylinder Head Service Kit 30-33490

    KIBBLEWHITE Cylinder Head Service Kit 30-33490

    KIBBLEWHITE

    $404.95
    KIBBLEWHITE Cylinder Head Service Kit 30-33490Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring...
    09263226
    SKU:
    09263226
    Availability:
    Ships Same Business Day
    Weight:
    1.95 LBS
    APPLICATION:
    EXHAUST
    SPRING OPEN PRESSURE:
    185 LB
    SPRING SEAT PRESSURE:
    70 LB
    RIDING STYLE:
    OFF-ROAD
    SPRING LIFT IMPERIAL:
    0.400'
    UNITS:
    KIT
    APPLICATION:
    INTAKE
    MATERIAL:
    TITANIUM
    MODEL:
    BLACK DIAMOND™
    PRODUCT NAME:
    CYLINDER HEAD SERVICE KIT
    RIDING STYLE:
    STREET
    SPRING LIFT:
    0,400'
    MATERIAL:
    C630 BRONZE
    $404.95
    Qty in Cart: 0
    Quantity:
    Price:
    $404.95
    Subtotal:
  • KIBBLEWHITE Cylinder Head Service Kit 82-83210

    KIBBLEWHITE Cylinder Head Service Kit 82-83210

    KIBBLEWHITE

    $668.95
    KIBBLEWHITE Cylinder Head Service Kit 82-83210Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring...
    09263227
    SKU:
    09263227
    Availability:
    Ships Same Business Day
    Weight:
    2.60 LBS
    MATERIAL:
    C630 BRONZE
    PRODUCT NAME:
    CYLINDER HEAD SERVICE KIT
    SPRING OPEN PRESSURE:
    205 LB
    UNITS:
    KIT
    APPLICATION:
    EXHAUST
    SPRING LIFT IMPERIAL:
    0.435'
    APPLICATION:
    INTAKE
    MATERIAL:
    TITANIUM
    MODEL:
    BLACK DIAMOND™
    RIDING STYLE:
    ATV
    SPRING LIFT:
    0,435'
    SPRING SEAT PRESSURE:
    80 IB
    $668.95
    Qty in Cart: 0
    Quantity:
    Price:
    $668.95
    Subtotal:
  • KIBBLEWHITE Cylinder Head Service Kit 82-83220

    KIBBLEWHITE Cylinder Head Service Kit 82-83220

    KIBBLEWHITE

    $652.95
    KIBBLEWHITE Cylinder Head Service Kit 82-83220Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring...
    09263228
    SKU:
    09263228
    Availability:
    Ships Same Business Day
    Weight:
    2.55 LBS
    MATERIAL:
    C630 BRONZE
    MODEL:
    BLACK DIAMOND™
    PRODUCT NAME:
    CYLINDER HEAD SERVICE KIT
    SPRING LIFT:
    0,435'
    SPRING OPEN PRESSURE:
    205 LB
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    RIDING STYLE:
    ATV
    UNITS:
    KIT
    SPRING SEAT PRESSURE:
    80 IB
    APPLICATION:
    EXHAUST
    SPRING LIFT IMPERIAL:
    0.435'
    $652.95
    Qty in Cart: 0
    Quantity:
    Price:
    $652.95
    Subtotal:
  • KIBBLEWHITE Valve Spring Kit 82-82550

    KIBBLEWHITE Valve Spring Kit 82-82550

    KIBBLEWHITE

    $232.95
    KIBBLEWHITE Valve Spring Kit 82-82550Black Diamond™ valves feature one-piece stainless steel construction with stellite tips and special impregnation to improve wear properties and reduce friction; White Diamond® valves feature one-piece construction and...
    09263229
    SKU:
    09263229
    Availability:
    Ships Same Business Day
    Weight:
    0.80 LBS
    MATERIAL:
    VITON
    SPRING LIFT:
    0,435'
    APPLICATION:
    INTAKE
    MATERIAL:
    STEEL
    RIDING STYLE:
    ATV
    APPLICATION:
    EXHAUST
    SPRING LIFT IMPERIAL:
    0.435'
    SPRING OPEN PRESSURE:
    205 LB
    TYPE:
    VALVE
    PRODUCT NAME:
    SPRING KIT
    SPRING SEAT PRESSURE:
    80 IB
    UNITS:
    KIT
    $232.95
    Qty in Cart: 0
    Quantity:
    Price:
    $232.95
    Subtotal:
  • KIBBLEWHITE Cylinder Head Service Kit 82-83240

    KIBBLEWHITE Cylinder Head Service Kit 82-83240

    KIBBLEWHITE

    $652.95
    KIBBLEWHITE Cylinder Head Service Kit 82-83240Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring...
    09263230
    SKU:
    09263230
    Availability:
    Ships Same Business Day
    Weight:
    2.60 LBS
    UNITS:
    KIT
    APPLICATION:
    EXHAUST
    SPRING OPEN PRESSURE:
    205 LB
    SPRING SEAT PRESSURE:
    80 IB
    MATERIAL:
    C630 BRONZE
    MATERIAL:
    STEEL
    SPRING LIFT IMPERIAL:
    0.435'
    APPLICATION:
    INTAKE
    MODEL:
    BLACK DIAMOND™
    PRODUCT NAME:
    CYLINDER HEAD SERVICE KIT
    RIDING STYLE:
    ATV
    SPRING LIFT:
    0,435'
    $652.95
    Qty in Cart: 0
    Quantity:
    Price:
    $652.95
    Subtotal:
  • KIBBLEWHITE Cylinder Head Service Kit 60-61790

    KIBBLEWHITE Cylinder Head Service Kit 60-61790

    KIBBLEWHITE

    $335.95
    KIBBLEWHITE Cylinder Head Service Kit 60-61790Kits contain all items to completely refresh and upgrade cylinder heads for popular Dirt/MX and Side x Side models, Cylinder Head Service Kits include the below components:, Lightweight Racing Valve Spring...
    09263232
    SKU:
    09263232
    Availability:
    Ships Same Business Day
    Weight:
    1.05 LBS
    MATERIAL:
    TITANIUM
    RIDING STYLE:
    STREET
    APPLICATION:
    EXHAUST
    SPRING LIFT IMPERIAL:
    0.440'
    MATERIAL:
    C630 BRONZE
    MODEL:
    WHITE DIAMOND™
    SPRING OPEN PRESSURE:
    171 LB
    UNITS:
    KIT
    APPLICATION:
    INTAKE
    PRODUCT NAME:
    CYLINDER HEAD SERVICE KIT
    RIDING STYLE:
    ATV
    SPRING LIFT:
    0,440'
    SPRING SEAT PRESSURE:
    57 LB
    $335.95
    Qty in Cart: 0
    Quantity:
    Price:
    $335.95
    Subtotal:
  • KIBBLEWHITE Intake Valve - Standard - M8 20-21012H

    KIBBLEWHITE Intake Valve - Standard - M8 20-21012H

    KIBBLEWHITE

    $31.95
    KIBBLEWHITE Intake Valve Standard M8 20-21012HExtensive R&D on all applications to provide high-performance components that last longer than OEM, Black Diamond valves are one-piece forgings made from 21-4N high-performance stainless steel, Trademarked...
    09263305
    SKU:
    09263305
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    STEM DIAMETER IMPERIAL:
    0.2347'
    RIDING STYLE:
    STREET
    TULIP ANGLE:
    10°
    UNITS:
    EACH
    APPLICATION:
    INTAKE
    HEAD DIAMETER IMPERIAL:
    1.571'
    LENGTH IMPERIAL:
    4.015'
    PRODUCT NAME:
    VALVE
    $31.95
    Qty in Cart: 0
    Quantity:
    Price:
    $31.95
    Subtotal:
  • KIBBLEWHITE Exhaust Valve - Standard - M8 20-21016H

    KIBBLEWHITE Exhaust Valve - Standard - M8 20-21016H

    KIBBLEWHITE

    $31.95
    KIBBLEWHITE Exhaust Valve Standard M8 20-21016HExtensive R&D on all applications to provide high-performance components that last longer than OEM, Black Diamond valves are one-piece forgings made from 21-4N high-performance stainless steel, Trademarked...
    09263306
    SKU:
    09263306
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    RIDING STYLE:
    STREET
    APPLICATION:
    EXHAUST
    HEAD DIAMETER IMPERIAL:
    1.264'
    LENGTH IMPERIAL:
    4.050'
    TULIP ANGLE:
    24°
    PRODUCT NAME:
    VALVE
    STEM DIAMETER IMPERIAL:
    0.2342'
    UNITS:
    EACH
    $31.95
    Qty in Cart: 0
    Quantity:
    Price:
    $31.95
    Subtotal:
  • KIBBLEWHITE Valve Kit - Knucklehead 20-22000

    KIBBLEWHITE Valve Kit - Knucklehead 20-22000

    KIBBLEWHITE

    $111.64
    KIBBLEWHITE Valve Kit Knucklehead 20-22000Full set of Black Diamond™ stainless steel standard size valves for engine applications listed, All valves are impregnated by a special process to a depth of .002” with a surface buildup of .0002”, This process...
    09263307
    SKU:
    09263307
    Availability:
    Ships Same Business Day
    Weight:
    0.95 LBS
    MODEL:
    BLACK DIAMOND™
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    VALVE KIT
    UNITS:
    KIT
    MATERIAL:
    STAINLESS STEEL
    $111.64
    Qty in Cart: 0
    Quantity:
    Price:
    $111.64
    Subtotal:
  • KIBBLEWHITE Engine Kit - Knucklehead 20-22050

    KIBBLEWHITE Engine Kit - Knucklehead 20-22050

    KIBBLEWHITE

    $225.66
    KIBBLEWHITE Engine Kit Knucklehead 20-22050Kits include KPMI® or equivalent valve spring kit, a full set of Black Diamond™stainless steel standard size valves, H.T. Steel valve keepers and valve stem seals (where applicable) for engine applications...
    09263308
    SKU:
    09263308
    Availability:
    Ships Same Business Day
    Weight:
    2.15 LBS
    RIDING STYLE:
    STREET
    SPRING OPEN PRESSURE:
    270 LB
    SPRING LIFT:
    0,415'
    PRODUCT NAME:
    ENGINE KIT
    SPRING LIFT IMPERIAL:
    0.415'
    SPRING SEAT PRESSURE:
    127 LB
    UNITS:
    KIT
    $225.66
    Qty in Cart: 0
    Quantity:
    Price:
    $225.66
    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!