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Harley Engine

Harley Engine

Harley Engine

Harley Bike Engine Parts at JJ Motorsports

Rebuild and boost your Harley's engine with premium parts from JJ Motorsports. Our inventory features complete gasket sets, piston kits, oil filters, pushrod tubes, and coolers designed for maximum strength, leak-free sealing, and high-performance in extreme conditions. Compatible with Big Twins, Softail, Touring, and more, these components support top-end overhauls, oil management, and durability for street rides or custom builds.

Shop trusted brands like Drag Specialties for magnetic filters and Wiseco for forged pistons. Explore related categories such as Harley air and fuel for carb tuning or Harley drivetrain for transmission upgrades.

Top Harley Engine Products

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
  • DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 8" 608

    DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 8" 608

    DRAG SPECIALTIES

    $29.82
    Include 1/8" NPT chrome compression fittings for easy installation, Measured overall, including fittings, Made in the U.S.A.
    07110043
    SKU:
    07110043
    Availability:
    Ships Same Business Day
    Weight:
    0.16 LBS
    INSIDE DIAMETER IMPERIAL:
    11/32'
    MATERIAL:
    STAINLESS STEEL
    STYLE:
    UNIVERSAL
    STYLE:
    BRAIDED
    UNITS:
    EACH
    BASE COLOR:
    SILVER
    LENGTH IMPERIAL:
    8'
    LENGTH METRIC:
    20.5 CM
    RIDING STYLE:
    STREET
    TYPE:
    OIL
    COLOR/FINISH:
    CHROME
    FITTING CONNECTOR TYPE:
    1/8' NPT
    INSIDE DIAMETER METRIC:
    8.7 MM
    PRODUCT NAME:
    LINE
    $29.82
    Qty in Cart: 0
    Quantity:
    Price:
    $29.82
    Subtotal:
  • DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 10" 610

    DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 10" 610

    DRAG SPECIALTIES

    $30.85
    Include 1/8" NPT chrome compression fittings for easy installation, Measured overall, including fittings, Made in the U.S.A.
    07110045
    SKU:
    07110045
    Availability:
    Ships Same Business Day
    Weight:
    0.22 LBS
    STYLE:
    BRAIDED
    INSIDE DIAMETER IMPERIAL:
    11/32'
    LENGTH METRIC:
    25.5 CM
    PRODUCT NAME:
    LINE
    STYLE:
    UNIVERSAL
    COLOR/FINISH:
    CHROME
    FITTING CONNECTOR TYPE:
    1/8' NPT
    INSIDE DIAMETER METRIC:
    8.7 MM
    LENGTH IMPERIAL:
    10'
    MATERIAL:
    STAINLESS STEEL
    UNITS:
    EACH
    BASE COLOR:
    SILVER
    RIDING STYLE:
    STREET
    TYPE:
    OIL
    $30.85
    Qty in Cart: 0
    Quantity:
    Price:
    $30.85
    Subtotal:
  • DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 13" 613 DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 13" 613

    DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 13" 613

    DRAG SPECIALTIES

    $31.88
    Include 1/8" NPT chrome compression fittings for easy installation, Measured overall, including fittings, Made in the U.S.A.
    07110048
    SKU:
    07110048
    Availability:
    Ships Same Business Day
    Weight:
    0.21 LBS
    COLOR/FINISH:
    CHROME
    INSIDE DIAMETER METRIC:
    8.7 MM
    UNITS:
    EACH
    INSIDE DIAMETER IMPERIAL:
    11/32'
    PRODUCT NAME:
    LINE
    BASE COLOR:
    SILVER
    FITTING CONNECTOR TYPE:
    1/8' NPT
    RIDING STYLE:
    STREET
    TYPE:
    OIL
    LENGTH IMPERIAL:
    13'
    LENGTH METRIC:
    33 CM
    MATERIAL:
    STAINLESS STEEL
    STYLE:
    BRAIDED
    STYLE:
    UNIVERSAL
    $31.88
    Qty in Cart: 0
    Quantity:
    Price:
    $31.88
    Subtotal:
  • DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 16" 616

    DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 16" 616

    DRAG SPECIALTIES

    $33.94
    Include 1/8" NPT chrome compression fittings for easy installation, Measured overall, including fittings, Made in the U.S.A.
    07110051
    SKU:
    07110051
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    BASE COLOR:
    SILVER
    LENGTH IMPERIAL:
    16'
    RIDING STYLE:
    STREET
    TYPE:
    OIL
    INSIDE DIAMETER IMPERIAL:
    11/32'
    LENGTH METRIC:
    40.5 CM
    PRODUCT NAME:
    LINE
    STYLE:
    UNIVERSAL
    COLOR/FINISH:
    CHROME
    FITTING CONNECTOR TYPE:
    1/8' NPT
    INSIDE DIAMETER METRIC:
    8.7 MM
    MATERIAL:
    STAINLESS STEEL
    UNITS:
    EACH
    STYLE:
    BRAIDED
    $33.94
    Qty in Cart: 0
    Quantity:
    Price:
    $33.94
    Subtotal:
  • DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 20" 620

    DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 20" 620

    DRAG SPECIALTIES

    $36.00
    Include 1/8" NPT chrome compression fittings for easy installation, Measured overall, including fittings, Made in the U.S.A.
    07110054
    SKU:
    07110054
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    COLOR/FINISH:
    CHROME
    FITTING CONNECTOR TYPE:
    1/8' NPT
    INSIDE DIAMETER METRIC:
    8.7 MM
    PRODUCT NAME:
    LINE
    BASE COLOR:
    SILVER
    RIDING STYLE:
    STREET
    TYPE:
    OIL
    MATERIAL:
    STAINLESS STEEL
    STYLE:
    BRAIDED
    UNITS:
    EACH
    INSIDE DIAMETER IMPERIAL:
    11/32'
    LENGTH IMPERIAL:
    20'
    LENGTH METRIC:
    51 CM
    STYLE:
    UNIVERSAL
    $36.00
    Qty in Cart: 0
    Quantity:
    Price:
    $36.00
    Subtotal:
  • DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 24" 624

    DRAG SPECIALTIES Oil Line with Fittings - Stainless Steel - 24" 624

    DRAG SPECIALTIES

    $38.06
    Include 1/8" NPT chrome compression fittings for easy installation, Measured overall, including fittings, Made in the U.S.A.
    07110056
    SKU:
    07110056
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    COLOR/FINISH:
    CHROME
    FITTING CONNECTOR TYPE:
    1/8' NPT
    INSIDE DIAMETER METRIC:
    8.7 MM
    PRODUCT NAME:
    LINE
    UNITS:
    EACH
    BASE COLOR:
    SILVER
    RIDING STYLE:
    STREET
    TYPE:
    OIL
    LENGTH IMPERIAL:
    24'
    LENGTH METRIC:
    61 CM
    STYLE:
    BRAIDED
    INSIDE DIAMETER IMPERIAL:
    11/32'
    MATERIAL:
    STAINLESS STEEL
    STYLE:
    UNIVERSAL
    $38.06
    Qty in Cart: 0
    Quantity:
    Price:
    $38.06
    Subtotal:
  • DRAG SPECIALTIES Custom Oil Filter Mount 20302-BX-LB1

    DRAG SPECIALTIES Custom Oil Filter Mount 20302-BX-LB1

    DRAG SPECIALTIES

    $62.78
    Features 1/4" NPT fittings and may be used with 3/8"stainless steel or rubber lines, Accepts all Evolution style oil filters, Designed to replace the OEM cast mount
    DS275104
    SKU:
    DS275104
    Availability:
    Ships Same Business Day
    Weight:
    1.13 LBS
    UNITS:
    EACH
    BASE FINISH:
    CHROME
    TYPE:
    OIL FILTER
    COLOR/FINISH:
    CHROME
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    MOUNT
    $62.78
    Qty in Cart: 0
    Quantity:
    Price:
    $62.78
    Subtotal:
  • DRAG SPECIALTIES Oil Plug with LCD 46472

    DRAG SPECIALTIES Oil Plug with LCD 46472

    DRAG SPECIALTIES

    $140.03
    Billet aluminum with liquid crystal display, Push-button readout with automatic shutoff
    07100033
    SKU:
    07100033
    Availability:
    Ships Same Business Day
    Weight:
    0.35 LBS
    BASE FINISH:
    POLISHED
    COLOR/FINISH:
    POLISHED
    FEATURES:
    LCD DISPLAY
    MATERIAL:
    ALUMINUM
    FEATURES:
    TEMPERATURE GAUGE
    PRODUCT NAME:
    OIL DIPSTICK
    RIDING STYLE:
    STREET
    UNITS:
    EACH
    TYPE:
    OIL FILLER CAP
    $140.03
    Qty in Cart: 0
    Quantity:
    Price:
    $140.03
    Subtotal:
  • DRAG SPECIALTIES Oil Plug - With Temperature Gauge 82574

    DRAG SPECIALTIES Oil Plug - With Temperature Gauge 82574

    DRAG SPECIALTIES

    $95.74
    Sensitive to oil temperatures up to 350°F, Chrome gauge bezel
    07100047
    SKU:
    07100047
    Availability:
    Ships Same Business Day
    Weight:
    0.21 LBS
    RIDING STYLE:
    STREET
    STYLE:
    ELECTRONIC
    HOUSING COLOR:
    CHROME
    PRODUCT NAME:
    OIL PLUG
    TYPE:
    TEMPERATURE GAUGE
    LENGTH IMPERIAL:
    1.625'
    UNITS:
    EACH
    $95.74
    Qty in Cart: 0
    Quantity:
    Price:
    $95.74
    Subtotal:
  • FEULING OIL PUMP CORP. Complete Cam Kit - 574C 7209 FEULING OIL PUMP CORP. Complete Cam Kit - 574C 7209

    FEULING OIL PUMP CORP. Complete Cam Kit - 574C 7209

    FEULING OIL PUMP CORP.

    $1,649.95
    All necessary components from top-to-bottom of the camchest, Provide maximum reliability, longevity, peak performance, and the coolest engine and oil temperatures obtainable, Quieter and smoother engine operation, Increase oil pressure, scavenge volume...
    09250517
    SKU:
    09250517
    Availability:
    Ships Same Business Day
    Weight:
    11.75 LBS
    EXHAUST CLOSE IMPERIAL:
    14°
    EXHAUST OPEN IMPERIAL:
    61°
    GRIND:
    574 SERIES
    TYPE:
    CHAIN
    APPLICATION:
    EXHAUST
    INTAKE CLOSE IMPERIAL:
    45°
    INTAKE OPEN IMPERIAL:
    15°
    PRODUCT NAME:
    CAM PLATE KIT
    EXHAUST LIFT IMPERIAL:
    0.574'
    INTAKE DURATION IMPERIAL:
    240°
    INTAKE LIFT IMPERIAL:
    0.574'
    RIDING STYLE:
    STREET
    APPLICATION:
    INTAKE
    EXHAUST DURATION IMPERIAL:
    255°
    MODEL:
    HP+®
    UNITS:
    KIT
    $1,649.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,649.95
    Subtotal:
  • FEULING OIL PUMP CORP. Complete Cam Kit - 525G 7204 FEULING OIL PUMP CORP. Complete Cam Kit - 525G 7204

    FEULING OIL PUMP CORP. Complete Cam Kit - 525G 7204

    FEULING OIL PUMP CORP.

    $1,649.95
    All necessary components from top-to-bottom of the camchest, Provide maximum reliability, longevity, peak performance, and the coolest engine and oil temperatures obtainable, Quieter and smoother engine operation, Increase oil pressure, scavenge volume...
    09250518
    SKU:
    09250518
    Availability:
    Ships Same Business Day
    Weight:
    11.08 LBS
    INTAKE OPEN IMPERIAL:
    4°
    PRODUCT NAME:
    CAM PLATE KIT
    UNITS:
    KIT
    GRIND:
    525 SERIES
    INTAKE LIFT IMPERIAL:
    0.525'
    APPLICATION:
    INTAKE
    EXHAUST CLOSE IMPERIAL:
    5°
    EXHAUST DURATION IMPERIAL:
    236°
    MODEL:
    HP+®
    RIDING STYLE:
    STREET
    TYPE:
    GEAR
    APPLICATION:
    EXHAUST
    EXHAUST LIFT IMPERIAL:
    0.535'
    EXHAUST OPEN IMPERIAL:
    51°
    INTAKE CLOSE IMPERIAL:
    42°
    INTAKE DURATION IMPERIAL:
    226°
    $1,649.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,649.95
    Subtotal:
  • FEULING OIL PUMP CORP. Chain Conversion Reaper Cam - Twin Cam 1017

    FEULING OIL PUMP CORP. Chain Conversion Reaper Cam - Twin Cam 1017

    FEULING OIL PUMP CORP.

    $409.95
    Power band for modified engines and an excellent bolt-in for stock 96", 103" and 110" engines, Responds well to modified cylinder heads increased compression ratio, performance exhaust and intake systems, Extremely smooth cam-lobe design creates a smooth...
    09250607
    SKU:
    09250607
    Availability:
    Ships Same Business Day
    Weight:
    2.86 LBS
    APPLICATION:
    EXHAUST
    EXHAUST LIFT IMPERIAL:
    0.574'
    EXHAUST CLOSE IMPERIAL:
    14°
    EXHAUST OPEN IMPERIAL:
    61°
    GRIND:
    574 SERIES
    INTAKE OPEN IMPERIAL:
    15°
    MODEL:
    REAPER
    APPLICATION:
    INTAKE
    EXHAUST DURATION IMPERIAL:
    255°
    TYPE:
    CHAIN CONVERSION
    INTAKE CLOSE IMPERIAL:
    45°
    INTAKE DURATION IMPERIAL:
    240°
    INTAKE LIFT IMPERIAL:
    0.574'
    PRODUCT NAME:
    CAMSHAFT
    RIDING STYLE:
    STREET
    UNITS:
    PAIR
    $409.95
    Qty in Cart: 0
    Quantity:
    Price:
    $409.95
    Subtotal:
  • FEULING OIL PUMP CORP. Camshaft Installation Kit - Chain Conversion 2064

    FEULING OIL PUMP CORP. Camshaft Installation Kit - Chain Conversion 2064

    FEULING OIL PUMP CORP.

    $121.95
    Each kit includes cam plate roller bearings, Koyo Torrington® full roller inner needle bearings, 12-point ARP® camshaft and crankshaft bolts, ARP® fastener moly paste and Loctite® compound and hardened washers, Gaskets include copper exhaust gaskets, cam...
    09250628
    SKU:
    09250628
    Availability:
    Ships Same Business Day
    Weight:
    0.85 LBS
    UNITS:
    KIT
    RIDING STYLE:
    STREET
    TYPE:
    CHAIN CONVERSION
    MODEL:
    PLUS
    PRODUCT NAME:
    INSTALLATION KIT
    $121.95
    Qty in Cart: 0
    Quantity:
    Price:
    $121.95
    Subtotal:
  • FEULING OIL PUMP CORP. Chain Drive Reaper Conversion Cam - 543 Series 1015

    FEULING OIL PUMP CORP. Chain Drive Reaper Conversion Cam - 543 Series 1015

    FEULING OIL PUMP CORP.

    $409.95
    Offers more power than the 525 cams without sacrificing low end torque, Extremely smooth cam lobe layout maintains quiet valve train and produces the smoothest cruise power band available, Excellent bolt-in camshaft for stock to mid 96" and 103" engines...
    09250671
    SKU:
    09250671
    Availability:
    Ships Same Business Day
    Weight:
    3.15 LBS
    INTAKE CLOSE IMPERIAL:
    43°
    PRODUCT NAME:
    CAMSHAFT
    UNITS:
    PAIR
    APPLICATION:
    EXHAUST
    EXHAUST CLOSE IMPERIAL:
    12°
    EXHAUST DURATION IMPERIAL:
    248°
    INTAKE OPEN IMPERIAL:
    15°
    APPLICATION:
    INTAKE
    EXHAUST LIFT IMPERIAL:
    0.574'
    INTAKE DURATION IMPERIAL:
    238°
    INTAKE LIFT IMPERIAL:
    0.543'
    RIDING STYLE:
    STREET
    TYPE:
    CHAIN CONVERSION
    EXHAUST OPEN IMPERIAL:
    56°
    GRIND:
    543 SERIES
    MODEL:
    REAPER
    $409.95
    Qty in Cart: 0
    Quantity:
    Price:
    $409.95
    Subtotal:
  • FEULING OIL PUMP CORP. Cam - 594 Series - Chain Conversion 1019

    FEULING OIL PUMP CORP. Cam - 594 Series - Chain Conversion 1019

    FEULING OIL PUMP CORP.

    $409.95
    Fierce performing camshaft for an array of engine sizes, large displacement 103", 110" and 124" engines looking for a superior torque band with excellent horsepower gains in heavy bikes (2200-6250), Smaller high-revving displacement 95" style engines in...
    09250672
    SKU:
    09250672
    Availability:
    Ships Same Business Day
    Weight:
    3.00 LBS
    APPLICATION:
    INTAKE
    EXHAUST CLOSE IMPERIAL:
    16°
    EXHAUST OPEN IMPERIAL:
    64°
    INTAKE CLOSE IMPERIAL:
    56°
    INTAKE DURATION IMPERIAL:
    255°
    INTAKE LIFT IMPERIAL:
    0.594'
    EXHAUST LIFT IMPERIAL:
    0.604'
    MODEL:
    REAPER
    UNITS:
    PAIR
    APPLICATION:
    EXHAUST
    INTAKE OPEN IMPERIAL:
    19°
    PRODUCT NAME:
    CAMSHAFT
    EXHAUST DURATION IMPERIAL:
    260°
    GRIND:
    594 SERIES
    RIDING STYLE:
    STREET
    TYPE:
    CHAIN CONVERSION
    Qty in Cart: 0
    Quantity:
    Price:
    $409.95
    Subtotal:
  • FEULING OIL PUMP CORP. SPROCKET CAM CHAIN RR KT 1093

    FEULING OIL PUMP CORP. SPROCKET CAM CHAIN RR KT 1093

    FEULING OIL PUMP CORP.

    $129.95
    FEULING OIL PUMP CORP. SPROCKET CAM CHAIN RR KT
    09251370
    SKU:
    09251370
    Availability:
    Ships Same Business Day
    Weight:
    1.26 LBS
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    SPROCKET
    MATERIAL:
    STEEL
    TYPE:
    CAM CHAIN
    UNITS:
    EACH
    $129.95
    Qty in Cart: 0
    Quantity:
    Price:
    $129.95
    Subtotal:
  • FEULING OIL PUMP CORP. SPROCKET CAM CHAIN REAR 1094

    FEULING OIL PUMP CORP. SPROCKET CAM CHAIN REAR 1094

    FEULING OIL PUMP CORP.

    $79.95
    FEULING OIL PUMP CORP. SPROCKET CAM CHAIN REAR
    09251371
    SKU:
    09251371
    Availability:
    Ships Same Business Day
    Weight:
    0.71 LBS
    MATERIAL:
    STEEL
    PRODUCT NAME:
    SPROCKET
    RIDING STYLE:
    STREET
    TYPE:
    CAM CHAIN
    UNITS:
    EACH
    $79.95
    Qty in Cart: 0
    Quantity:
    Price:
    $79.95
    Subtotal:
  • FEULING OIL PUMP CORP. Cam - 538 Series - Chain Drive 1351

    FEULING OIL PUMP CORP. Cam - 538 Series - Chain Drive 1351

    FEULING OIL PUMP CORP.

    $329.95
    FEULING OIL PUMP CORP. Cam - 538 Series - Chain Drive
    09251372
    SKU:
    09251372
    Availability:
    Ships Same Business Day
    Weight:
    1.86 LBS
    GRIND:
    538 SERIES
    RIDING STYLE:
    STREET
    TYPE:
    CHAIN
    MODEL:
    REAPER
    PRODUCT NAME:
    CAM
    UNITS:
    EACH
    $329.95
    Qty in Cart: 0
    Quantity:
    Price:
    $329.95
    Subtotal:
  • FEULING OIL PUMP CORP. Race Series Camshaft Kit 1461

    FEULING OIL PUMP CORP. Race Series Camshaft Kit 1461

    FEULING OIL PUMP CORP.

    $699.95
    FEULING OIL PUMP CORP. Race Series Camshaft Kit
    09251374
    SKU:
    09251374
    Availability:
    Ships Same Business Day
    Weight:
    4.41 LBS
    MODEL:
    RACE SERIES®
    UNITS:
    KIT
    GRIND:
    538 SERIES
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    CAMSHAFT KIT
    TYPE:
    CHAIN
    $699.95
    Qty in Cart: 0
    Quantity:
    Price:
    $699.95
    Subtotal:
  • FEULING OIL PUMP CORP. Camchest Kit - HP+‚® - Twin Cam 7205P

    FEULING OIL PUMP CORP. Camchest Kit - HP+‚® - Twin Cam 7205P

    FEULING OIL PUMP CORP.

    $1,649.95
    All necessary components from top-to-bottom of the camchest, Provide maximum reliability, longevity, peak performance, and the coolest engine and oil temperatures obtainable, Quieter and smoother engine operation, Increase oil pressure, scavenge volume...
    09251376
    SKU:
    09251376
    Availability:
    Ships Same Business Day
    Weight:
    11.21 LBS
    UNITS:
    KIT
    RIDING STYLE:
    STREET
    TYPE:
    GEAR
    GRIND:
    525 SERIES
    PRODUCT NAME:
    CAMCHEST KIT
    MODEL:
    HP+®
    $1,649.95
    Qty in Cart: 0
    Quantity:
    Price:
    $1,649.95
    Subtotal:
  • Total: items /

Adding your products to cart

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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