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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
  • KIBBLEWHITE Valve Spring Kit 82-82550

    KIBBLEWHITE Valve Spring Kit 82-82550

    KIBBLEWHITE

    $232.66
    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
    $232.66
    Qty in Cart: 0
    Quantity:
    Price:
    $232.66
    Subtotal:
  • KIBBLEWHITE Cylinder Head Service Kit 82-83240

    KIBBLEWHITE Cylinder Head Service Kit 82-83240

    KIBBLEWHITE

    $652.03
    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'
    $652.03
    Qty in Cart: 0
    Quantity:
    Price:
    $652.03
    Subtotal:
  • KIBBLEWHITE Cylinder Head Service Kit 60-61790

    KIBBLEWHITE Cylinder Head Service Kit 60-61790

    KIBBLEWHITE

    $335.14
    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
    $335.14
    Qty in Cart: 0
    Quantity:
    Price:
    $335.14
    Subtotal:
  • KIBBLEWHITE Valve Spring Kit - Beehive 91-91300

    KIBBLEWHITE Valve Spring Kit - Beehive 91-91300

    KIBBLEWHITE

    $409.48
    KIBBLEWHITE Valve Spring Kit Beehive 91-91300Progressively wound springs using Kobe super-clean, chrome silicon-based wire that is heat treated and shot peened, Tight-tolerance, FEA-designed hardened steel Posi-Loc™ style upper retainers to ensure...
    09263317
    SKU:
    09263317
    Availability:
    Ships Same Business Day
    Weight:
    1.10 LBS
    APPLICATION:
    EXHAUST
    SPRING OPEN PRESSURE:
    161 LB
    TYPE:
    VALVE
    STYLE:
    OVATE WIRE BEEHIVE
    UNITS:
    KIT
    MATERIAL:
    STEEL
    RIDING STYLE:
    UTV
    SPRING LIFT IMPERIAL:
    0.350'
    SPRING SEAT PRESSURE:
    51 LB
    APPLICATION:
    INTAKE
    COLLAR MATERIAL:
    STEEL
    PRODUCT NAME:
    SPRING KIT
    $409.48
    Qty in Cart: 0
    Quantity:
    Price:
    $409.48
    Subtotal:
  • KIBBLEWHITE Valve Guide - Standard - Intake/Exhaust 91-91320M

    KIBBLEWHITE Valve Guide - Standard - Intake/Exhaust 91-91320M

    KIBBLEWHITE

    $14.36
    KIBBLEWHITE Valve Guide Standard Intake/Exhaust 91-91320MAll valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.
    09263318
    SKU:
    09263318
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    APPLICATION:
    EXHAUST
    SIZE IMPERIAL:
    STANDARD
    UNITS:
    EACH
    INSIDE DIAMETER IMPERIAL:
    0.1955'
    APPLICATION:
    INTAKE
    PRODUCT NAME:
    VALVE GUIDE
    OUTSIDE DIAMETER IMPERIAL:
    0.3565'
    RIDING STYLE:
    OFF-ROAD
    Qty in Cart: 0
    Quantity:
    Price:
    $14.36
    Subtotal:
  • KIBBLEWHITE Intake Valve - Standard 91-91312H

    KIBBLEWHITE Intake Valve - Standard 91-91312H

    KIBBLEWHITE

    $37.55
    KIBBLEWHITE Intake Valve Standard 91-91312HWhite Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel or Inconel-751, Electroplated with a 360º anode, to produce an even coat of the highest grade hard chrome finish, Made in the...
    09263319
    SKU:
    09263319
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    APPLICATION:
    INTAKE
    LENGTH IMPERIAL:
    3.305'
    SIZE METRIC:
    STANDARD
    STEM DIAMETER IMPERIAL:
    0.1960'
    RIDING STYLE:
    UTV
    HEAD DIAMETER METRIC:
    29.01 MM
    MODEL:
    WHITE DIAMOND™
    UNITS:
    EACH
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    VALVE
    TULIP ANGLE:
    15°
    $37.55
    Qty in Cart: 0
    Quantity:
    Price:
    $37.55
    Subtotal:
  • KIBBLEWHITE Piston Kit 30-33100

    KIBBLEWHITE Piston Kit 30-33100

    KIBBLEWHITE

    $660.02
    KIBBLEWHITE Piston Kit 30-33100Kit includes the following, 2 intake titanium retainers, 2 exhaust titanium retainers, 2 Intake CrSi valve springs, 2 exhaust CrSi valve springs, 2 intake H.T. steel basewashers, 2 exhaust H.T. steel basewashers, 2 intake...
    09031595
    SKU:
    09031595
    Availability:
    Ships Same Business Day
    Weight:
    1.85 LBS
    PRODUCT NAME:
    SERVICE KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    TYPE:
    TOP END
    BORE SIZE METRIC:
    96.00 MM
    $660.02
    Qty in Cart: 0
    Quantity:
    Price:
    $660.02
    Subtotal:
  • KIBBLEWHITE Piston System 30-32700

    KIBBLEWHITE Piston System 30-32700

    KIBBLEWHITE

    $660.02
    KIBBLEWHITE Piston System 30-32700The only safe way to maximize compression; the valve reliefs in the piston are purposely convex and match the geometry of the dishes in the valves, Conversion to Black Diamond™ stainless steel valves offers up to twice...
    09031584
    SKU:
    09031584
    Availability:
    Ships Same Business Day
    Weight:
    1.90 LBS
    PRODUCT NAME:
    SERVICE KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    TYPE:
    TOP END
    BORE SIZE METRIC:
    96.00 MM
    $660.02
    Qty in Cart: 0
    Quantity:
    Price:
    $660.02
    Subtotal:
  • KIBBLEWHITE Piston System 30-32900

    KIBBLEWHITE Piston System 30-32900

    KIBBLEWHITE

    $660.02
    KIBBLEWHITE Piston System 30-32900The only safe way to maximize compression; the valve reliefs in the piston are purposely convex and match the geometry of the dishes in the valves, Conversion to Black Diamond™ stainless steel valves offers up to twice...
    09031585
    SKU:
    09031585
    Availability:
    Ships Same Business Day
    Weight:
    1.90 LBS
    PRODUCT NAME:
    SERVICE KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    TYPE:
    TOP END
    BORE SIZE METRIC:
    96.00 MM
    $660.02
    Qty in Cart: 0
    Quantity:
    Price:
    $660.02
    Subtotal:
  • KIBBLEWHITE Piston System 30-32500

    KIBBLEWHITE Piston System 30-32500

    KIBBLEWHITE

    $660.02
    KIBBLEWHITE Piston System 30-32500The only safe way to maximize compression; the valve reliefs in the piston are purposely convex and match the geometry of the dishes in the valves, Conversion to Black Diamond™ stainless steel valves offers up to twice...
    09031586
    SKU:
    09031586
    Availability:
    Ships Same Business Day
    Weight:
    1.90 LBS
    BORE SIZE METRIC:
    94.00 MM
    PRODUCT NAME:
    SERVICE KIT
    RIDING STYLE:
    ATV
    UNITS:
    KIT
    TYPE:
    TOP END
    $660.02
    Qty in Cart: 0
    Quantity:
    Price:
    $660.02
    Subtotal:
  • KIBBLEWHITE Piston System 30-32600

    KIBBLEWHITE Piston System 30-32600

    KIBBLEWHITE

    $660.02
    KIBBLEWHITE Piston System 30-32600The only safe way to maximize compression; the valve reliefs in the piston are purposely convex and match the geometry of the dishes in the valves, Conversion to Black Diamond™ stainless steel valves offers up to twice...
    09031587
    SKU:
    09031587
    Availability:
    Ships Same Business Day
    Weight:
    1.90 LBS
    PRODUCT NAME:
    SERVICE KIT
    RIDING STYLE:
    ATV
    TYPE:
    TOP END
    UNITS:
    KIT
    BORE SIZE METRIC:
    96.00 MM
    Qty in Cart: 0
    Quantity:
    Price:
    $660.02
    Subtotal:
  • KIBBLEWHITE Piston System 80-81900

    KIBBLEWHITE Piston System 80-81900

    KIBBLEWHITE

    $736.36
    KIBBLEWHITE Piston System 80-81900The only safe way to maximize compression; the valve reliefs in the piston are purposely convex and match the geometry of the dishes in the valves, Conversion to Black Diamond™ stainless steel valves offers up to twice...
    09031588
    SKU:
    09031588
    Availability:
    Ships Same Business Day
    Weight:
    1.90 LBS
    BORE SIZE METRIC:
    95.00 MM
    TYPE:
    TOP END
    PRODUCT NAME:
    SERVICE KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    $736.36
    Qty in Cart: 0
    Quantity:
    Price:
    $736.36
    Subtotal:
  • KIBBLEWHITE Piston System 80-82000

    KIBBLEWHITE Piston System 80-82000

    KIBBLEWHITE

    $736.36
    KIBBLEWHITE Piston System 80-82000The only safe way to maximize compression; the valve reliefs in the piston are purposely convex and match the geometry of the dishes in the valves, Conversion to Black Diamond™ stainless steel valves offers up to twice...
    09031589
    SKU:
    09031589
    Availability:
    Ships Same Business Day
    Weight:
    1.90 LBS
    BORE SIZE METRIC:
    95.00 MM
    TYPE:
    TOP END
    PRODUCT NAME:
    SERVICE KIT
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    $736.36
    Qty in Cart: 0
    Quantity:
    Price:
    $736.36
    Subtotal:
  • KIBBLEWHITE Valve Guide 60-60320

    KIBBLEWHITE Valve Guide 60-60320

    KIBBLEWHITE

    $19.83
    KIBBLEWHITE Valve Guide 60-60320All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.
    09260291
    SKU:
    09260291
    Availability:
    Ships Same Business Day
    Weight:
    0.03 LBS
    INSIDE DIAMETER IMPERIAL:
    0.1955'
    OUTSIDE DIAMETER IMPERIAL:
    0.4170'
    RIDING STYLE:
    OFF-ROAD
    PRODUCT NAME:
    VALVE GUIDE
    UNITS:
    EACH
    APPLICATION:
    EXHAUST
    MATERIAL:
    C630 BRONZE
    SIZE IMPERIAL:
    STANDARD
    $19.83
    Qty in Cart: 0
    Quantity:
    Price:
    $19.83
    Subtotal:
  • KIBBLEWHITE Valve Spring Kit 30-30880

    KIBBLEWHITE Valve Spring Kit 30-30880

    KIBBLEWHITE

    $206.09
    KIBBLEWHITE Valve Spring Kit 30-30880Spring kits contain springs and titanium upper collars; lower collars included as required; spring kits are engineered for use with standard and oversized valves, Spring kits come complete for one motor, Keepers are...
    09260293
    SKU:
    09260293
    Availability:
    Ships Same Business Day
    Weight:
    0.38 LBS
    APPLICATION:
    EXHAUST
    PRODUCT NAME:
    SPRING KIT
    APPLICATION:
    INTAKE
    SPRING OPEN PRESSURE:
    143 LB
    RIDING STYLE:
    OFF-ROAD
    SPRING LIFT IMPERIAL:
    0.350'
    TYPE:
    VALVE
    MATERIAL:
    TITANIUM
    UNITS:
    KIT
    $206.09
    Qty in Cart: 0
    Quantity:
    Price:
    $206.09
    Subtotal:
  • KIBBLEWHITE Intake Valve - CRF150R - Standard 30-30910

    KIBBLEWHITE Intake Valve - CRF150R - Standard 30-30910

    KIBBLEWHITE

    $37.55
    KIBBLEWHITE Intake Valve CRF150R Standard 30-30910Black Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamond™ proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and...
    09260298
    SKU:
    09260298
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    MODEL:
    BLACK DIAMOND™
    STEM DIAMETER IMPERIAL:
    0.1765'
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    VALVE
    APPLICATION:
    INTAKE
    TULIP ANGLE:
    19°
    UNITS:
    EACH
    HEAD DIAMETER METRIC:
    26.00 MM
    LENGTH IMPERIAL:
    3.065'
    RIDING STYLE:
    OFF-ROAD
    $37.55
    Qty in Cart: 0
    Quantity:
    Price:
    $37.55
    Subtotal:
  • KIBBLEWHITE Intake Valve Guide 30-31470

    KIBBLEWHITE Intake Valve Guide 30-31470

    KIBBLEWHITE

    $24.89
    KIBBLEWHITE Intake Valve Guide 30-31470All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.
    09261132
    SKU:
    09261132
    Availability:
    Ships Same Business Day
    Weight:
    0.04 LBS
    INSIDE DIAMETER IMPERIAL:
    0.1961'
    PRODUCT NAME:
    VALVE GUIDE
    MATERIAL:
    C630 BRONZE
    RIDING STYLE:
    OFF-ROAD
    APPLICATION:
    INTAKE
    SIZE IMPERIAL:
    STANDARD
    OUTSIDE DIAMETER IMPERIAL:
    0.3965'
    UNITS:
    EACH
    $24.89
    Qty in Cart: 0
    Quantity:
    Price:
    $24.89
    Subtotal:
  • KIBBLEWHITE Intake Valve 80-80060

    KIBBLEWHITE Intake Valve 80-80060

    KIBBLEWHITE

    $54.10
    KIBBLEWHITE Intake Valve 80-80060Black Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamond™ proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear, Made in the U...
    KW8080060
    SKU:
    KW8080060
    Availability:
    Ships Same Business Day
    Weight:
    0.05 LBS
    RIDING STYLE:
    UTV
    MODEL:
    BLACK DIAMOND™
    PRODUCT NAME:
    VALVE
    STEM DIAMETER IMPERIAL:
    0.2355'
    TULIP ANGLE:
    15°
    APPLICATION:
    INTAKE
    HEAD DIAMETER METRIC:
    30.00 MM
    LENGTH IMPERIAL:
    3.960'
    MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    $54.10
    Qty in Cart: 0
    Quantity:
    Price:
    $54.10
    Subtotal:
  • KIBBLEWHITE Exhaust Valve 80-80063

    KIBBLEWHITE Exhaust Valve 80-80063

    KIBBLEWHITE

    $54.10
    KIBBLEWHITE Exhaust Valve 80-80063Black Diamond™ valves are CNC machined from one-piece forgings of EV8 Stainless Steel, Black Diamond™ proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear, Made in the...
    KW8080063
    SKU:
    KW8080063
    Availability:
    Ships Same Business Day
    Weight:
    0.10 LBS
    HEAD DIAMETER METRIC:
    32.00 MM
    LENGTH IMPERIAL:
    3.650'
    MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    VALVE
    RIDING STYLE:
    UTV
    TULIP ANGLE:
    25°
    RIDING STYLE:
    ATV
    STEM DIAMETER IMPERIAL:
    0.2348'
    UNITS:
    EACH
    APPLICATION:
    EXHAUST
    MODEL:
    BLACK DIAMOND™
    $54.10
    Qty in Cart: 0
    Quantity:
    Price:
    $54.10
    Subtotal:
  • KIBBLEWHITE Intake/Exhaust Valve Guide 80-8010

    KIBBLEWHITE Intake/Exhaust Valve Guide 80-8010

    KIBBLEWHITE

    $19.89
    KIBBLEWHITE Intake/Exhaust Valve Guide 80-8010All valve guides are made of Ampco-45, a high-performance compound with 80% copper content to provide great heat conductivity and 5% nickel content for wear resistance, Made in the U.S.A.
    KW808010
    SKU:
    KW808010
    Availability:
    Ships Same Business Day
    Weight:
    0.13 LBS
    PRODUCT NAME:
    VALVE GUIDE
    UNITS:
    EACH
    OUTSIDE DIAMETER IMPERIAL:
    0.4942'
    SIZE IMPERIAL:
    STANDARD
    APPLICATION:
    EXHAUST
    APPLICATION:
    INTAKE
    INSIDE DIAMETER IMPERIAL:
    0.2750'
    MATERIAL:
    AMPCO-45
    RIDING STYLE:
    ATV
    $19.89
    Qty in Cart: 0
    Quantity:
    Price:
    $19.89
    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!