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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
  • JAMES GASKET Air Cleaner Gasket - M8 JGI-29000149

    JAMES GASKET Air Cleaner Gasket - M8 JGI-29000149

    JAMES GASKET

    $8.00
    A worn or damaged air cleaner gasket compromises your engine's intake seal, allowing unfiltered air to bypass your filtration system and potentially introducing contaminants into the combustion chamber. This JAMES GASKET replacement restores a proper...
    09345969
    SKU:
    09345969
    Availability:
    Ships Same Business Day
    Weight:
    0.11 LBS
    TYPE:
    AIR FILTER
    UNITS:
    5 PACK
    PRODUCT NAME:
    GASKET
    RIDING STYLE:
    STREET
    $8.00
    Qty in Cart: 0
    Quantity:
    Price:
    $8.00
    Subtotal:
  • Hastings HASTINGS Piston Rings - XL 7003

    Hastings HASTINGS Piston Rings - XL 7003

    HASTINGS

    $74.95
    Piston rings are critical to maintaining compression, controlling blow-by, and managing oil consumption—and worn or inferior rings will compromise engine performance and longevity across the board. The Hastings HASTINGS Piston Rings XL 7003 deliver the...
    DS750610
    SKU:
    DS750610
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    UNITS:
    SET
    PRODUCT NAME:
    PISTON RING
    STYLE:
    OEM REPLACEMENT
    BORE SIZE IMPERIAL:
    3.1875'
    RING MATERIAL:
    MOLY COATED
    BORE - OVERSIZE:
    STANDARD
    BORE OVERSIZE - IMPERIAL:
    STANDARD
    RIDING STYLE:
    STREET
    $74.95
    Qty in Cart: 0
    Quantity:
    Price:
    $74.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - XL 7003020

    Hastings HASTINGS Piston Rings - XL 7003020

    HASTINGS

    $74.95
    Piston rings are critical to engine performance—they seal combustion pressure, regulate oil consumption, and directly impact horsepower and longevity. Hastings piston rings are engineered to tighter tolerances and use premium materials that resist...
    DS750612
    SKU:
    DS750612
    Availability:
    Ships Same Business Day
    Weight:
    0.19 LBS
    BORE OVERSIZE - IMPERIAL:
    +0.020'
    RING MATERIAL:
    MOLY COATED
    BORE - OVERSIZE:
    +0,020'
    PRODUCT NAME:
    PISTON RING
    STYLE:
    OEM REPLACEMENT
    BORE SIZE IMPERIAL:
    3.207'
    RIDING STYLE:
    STREET
    UNITS:
    SET
    $74.95
    Qty in Cart: 0
    Quantity:
    Price:
    $74.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - XL 7003030

    Hastings HASTINGS Piston Rings - XL 7003030

    HASTINGS

    $74.95
    Piston rings are critical to engine sealing, compression, and oil control—and worn or substandard rings will tank your engine's performance and longevity. Hastings piston rings are engineered to exacting standards with proven materials and designs...
    DS750613
    SKU:
    DS750613
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE SIZE IMPERIAL:
    3.217'
    RING MATERIAL:
    MOLY COATED
    BORE - OVERSIZE:
    +0,030'
    BORE OVERSIZE - IMPERIAL:
    +0.030'
    RIDING STYLE:
    STREET
    PRODUCT NAME:
    PISTON RING
    UNITS:
    SET
    STYLE:
    OEM REPLACEMENT
    $74.95
    Qty in Cart: 0
    Quantity:
    Price:
    $74.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Shovelhead 6482

    Hastings HASTINGS Piston Rings - Shovelhead 6482

    HASTINGS

    $56.95
    Piston rings are critical wear items that directly impact engine compression, blow-by control, and oil consumption—especially in high-performance Shovelhead applications where reliability demands precision. The Hastings 6482 ring set combines proven ring...
    DS750620
    SKU:
    DS750620
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE SIZE IMPERIAL:
    3.437'
    UNITS:
    SET
    PRODUCT NAME:
    PISTON RING
    STYLE:
    OEM REPLACEMENT
    BORE - OVERSIZE:
    STANDARD
    BORE OVERSIZE - IMPERIAL:
    STANDARD
    RIDING STYLE:
    STREET
    RING MATERIAL:
    CAST
    $56.95
    Qty in Cart: 0
    Quantity:
    Price:
    $56.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Shovelhead 6482010

    Hastings HASTINGS Piston Rings - Shovelhead 6482010

    HASTINGS

    $56.95
    Piston rings are critical to engine longevity—they seal combustion pressure, regulate oil consumption, and maintain compression integrity. Hastings rings are engineered to exacting tolerances, delivering reliable performance and extended ring life in...
    DS750621
    SKU:
    DS750621
    Availability:
    Ships Same Business Day
    Weight:
    0.15 LBS
    UNITS:
    SET
    BORE - OVERSIZE:
    +0,010'
    PRODUCT NAME:
    PISTON RING
    RING MATERIAL:
    CAST
    STYLE:
    OEM REPLACEMENT
    BORE OVERSIZE - IMPERIAL:
    +0.010'
    BORE SIZE IMPERIAL:
    3.447'
    RIDING STYLE:
    STREET
    $56.95
    Qty in Cart: 0
    Quantity:
    Price:
    $56.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Shovelhead 6482020

    Hastings HASTINGS Piston Rings - Shovelhead 6482020

    HASTINGS

    $56.95
    Hastings piston rings are engineered to restore compression and oil control in your Shovelhead engine, directly impacting power delivery and longevity. A worn ring set compromises combustion efficiency and accelerates engine wear—replacing them with...
    DS750622
    SKU:
    DS750622
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE OVERSIZE - IMPERIAL:
    +0.020'
    BORE - OVERSIZE:
    +0,020'
    BORE SIZE IMPERIAL:
    3.457'
    PRODUCT NAME:
    PISTON RING
    RING MATERIAL:
    CAST
    STYLE:
    OEM REPLACEMENT
    RIDING STYLE:
    STREET
    UNITS:
    SET
    $56.95
    Qty in Cart: 0
    Quantity:
    Price:
    $56.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Shovelhead 6482030

    Hastings HASTINGS Piston Rings - Shovelhead 6482030

    HASTINGS

    $56.95
    Worn or damaged piston rings kill engine efficiency and power output—this Hastings ring set restores proper compression and oil control for consistent Shovelhead performance. Whether you're rebuilding after high mileage or maintaining race reliability,...
    DS750623
    SKU:
    DS750623
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE SIZE IMPERIAL:
    3.467'
    BORE - OVERSIZE:
    +0,030'
    PRODUCT NAME:
    PISTON RING
    RING MATERIAL:
    CAST
    STYLE:
    OEM REPLACEMENT
    BORE OVERSIZE - IMPERIAL:
    +0.030'
    RIDING STYLE:
    STREET
    UNITS:
    SET
    $56.95
    Qty in Cart: 0
    Quantity:
    Price:
    $56.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Shovelhead 6482040

    Hastings HASTINGS Piston Rings - Shovelhead 6482040

    HASTINGS

    $56.95
    Worn or damaged piston rings compromise compression, increase blowby, and waste fuel—directly killing your engine's performance and reliability. The Hastings 6482040 ring set restores proper sealing and combustion efficiency in your Shovelhead,...
    DS750624
    SKU:
    DS750624
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE OVERSIZE - IMPERIAL:
    +0.040'
    BORE - OVERSIZE:
    +0,040'
    BORE SIZE IMPERIAL:
    3.477'
    RIDING STYLE:
    STREET
    RING MATERIAL:
    CAST
    STYLE:
    OEM REPLACEMENT
    PRODUCT NAME:
    PISTON RING
    UNITS:
    SET
    $56.95
    Qty in Cart: 0
    Quantity:
    Price:
    $56.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Shovelhead 6482050

    Hastings HASTINGS Piston Rings - Shovelhead 6482050

    HASTINGS

    $56.95
    Piston ring integrity is critical to maintaining compression, controlling blow-by, and extending engine life in any high-performance Shovelhead application. The Hastings 6482050 ring set delivers the precision engineering and material quality necessary...
    DS750625
    SKU:
    DS750625
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE OVERSIZE - IMPERIAL:
    +0.050'
    RIDING STYLE:
    STREET
    RING MATERIAL:
    CAST
    BORE - OVERSIZE:
    +0,050'
    BORE SIZE IMPERIAL:
    3.487'
    STYLE:
    OEM REPLACEMENT
    PRODUCT NAME:
    PISTON RING
    UNITS:
    SET
    $56.95
    Qty in Cart: 0
    Quantity:
    Price:
    $56.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Shovelhead 6482060

    Hastings HASTINGS Piston Rings - Shovelhead 6482060

    HASTINGS

    $56.95
    Piston rings are critical to engine sealing, compression, and oil control—and worn or substandard rings will compromise power delivery and increase blowby across your Shovelhead. Hastings rings are engineered with proven ring designs and quality...
    DS750626
    SKU:
    DS750626
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE OVERSIZE - IMPERIAL:
    +0.060'
    BORE SIZE IMPERIAL:
    3.497'
    RIDING STYLE:
    STREET
    UNITS:
    SET
    BORE - OVERSIZE:
    +0,060'
    PRODUCT NAME:
    PISTON RING
    RING MATERIAL:
    CAST
    STYLE:
    OEM REPLACEMENT
    $56.95
    Qty in Cart: 0
    Quantity:
    Price:
    $56.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Shovelhead 6482070

    Hastings HASTINGS Piston Rings - Shovelhead 6482070

    HASTINGS

    $56.95
    Hastings piston rings are engineered for Shovelhead engines that demand reliability under sustained high-rpm operation. A quality ring set directly impacts compression efficiency, oil control, and engine longevity—making this a critical maintenance or...
    DS750627
    SKU:
    DS750627
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE - OVERSIZE:
    +0,070'
    RIDING STYLE:
    STREET
    UNITS:
    SET
    BORE OVERSIZE - IMPERIAL:
    +0.070'
    BORE SIZE IMPERIAL:
    3.507'
    RING MATERIAL:
    CAST
    STYLE:
    OEM REPLACEMENT
    PRODUCT NAME:
    PISTON RING
    $56.95
    Qty in Cart: 0
    Quantity:
    Price:
    $56.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Shovelhead 6127

    Hastings HASTINGS Piston Rings - Shovelhead 6127

    HASTINGS

    $61.95
    Piston ring degradation directly impacts compression, blow-by, and oil consumption—three critical factors that separate a tight engine from a leaker. The Hastings 6127 ring set delivers the sealing integrity your Shovelhead demands, with a proven design...
    DS750630
    SKU:
    DS750630
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    RIDING STYLE:
    STREET
    RING MATERIAL:
    CAST
    BORE - OVERSIZE:
    STANDARD
    BORE OVERSIZE - IMPERIAL:
    STANDARD
    BORE SIZE IMPERIAL:
    3.498'
    PRODUCT NAME:
    PISTON RING
    UNITS:
    SET
    STYLE:
    OEM REPLACEMENT
    $61.95
    Qty in Cart: 0
    Quantity:
    Price:
    $61.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Shovelhead 6127020

    Hastings HASTINGS Piston Rings - Shovelhead 6127020

    HASTINGS

    $61.95
    Maintaining proper compression and ring seal is critical for consistent power delivery and engine longevity in your Shovelhead. Hastings piston rings are engineered to withstand the demanding cycles of high-performance riding while minimizing blowby and...
    DS750632
    SKU:
    DS750632
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE OVERSIZE - IMPERIAL:
    +0.020'
    BORE - OVERSIZE:
    +0,020'
    PRODUCT NAME:
    PISTON RING
    RING MATERIAL:
    CAST
    STYLE:
    OEM REPLACEMENT
    BORE SIZE IMPERIAL:
    3.518'
    RIDING STYLE:
    STREET
    UNITS:
    SET
    $61.95
    Qty in Cart: 0
    Quantity:
    Price:
    $61.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Shovelhead 6127030

    Hastings HASTINGS Piston Rings - Shovelhead 6127030

    HASTINGS

    $61.95
    Proper piston ring sealing is critical to maintaining compression, controlling blow-by, and extending engine life in your Shovelhead. Hastings piston rings are engineered to deliver consistent performance across the RPM range while resisting the thermal...
    DS750633
    SKU:
    DS750633
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE SIZE IMPERIAL:
    3.528'
    UNITS:
    SET
    BORE - OVERSIZE:
    +0,030'
    PRODUCT NAME:
    PISTON RING
    RING MATERIAL:
    CAST
    STYLE:
    OEM REPLACEMENT
    BORE OVERSIZE - IMPERIAL:
    +0.030'
    RIDING STYLE:
    STREET
    $61.95
    Qty in Cart: 0
    Quantity:
    Price:
    $61.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Evolution 6164

    Hastings HASTINGS Piston Rings - Evolution 6164

    HASTINGS

    $35.95
    Piston rings are the critical seal between your combustion chamber and crankcase—get them wrong, and you're looking at blow-by, oil consumption, and lost power. The Hastings Evolution 6164 delivers proven ring geometry designed to maintain compression...
    DS750640
    SKU:
    DS750640
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE SIZE IMPERIAL:
    3.498'
    PRODUCT NAME:
    PISTON RING
    UNITS:
    SET
    BORE - OVERSIZE:
    STANDARD
    BORE OVERSIZE - IMPERIAL:
    STANDARD
    RIDING STYLE:
    STREET
    RING MATERIAL:
    CAST
    STYLE:
    OEM REPLACEMENT
    $35.95
    Qty in Cart: 0
    Quantity:
    Price:
    $35.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Evolution 6164010

    Hastings HASTINGS Piston Rings - Evolution 6164010

    HASTINGS

    $35.95
    Piston rings are the critical seal between your combustion chamber and crankcase—worn or improper rings kill compression, increase blowby, and tank engine efficiency. The Hastings Evolution 6164010 delivers OEM-quality ring geometry with proven materials...
    DS750641
    SKU:
    DS750641
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE OVERSIZE - IMPERIAL:
    +0.010'
    RIDING STYLE:
    STREET
    RING MATERIAL:
    CAST
    BORE SIZE IMPERIAL:
    3.508'
    PRODUCT NAME:
    PISTON RING
    UNITS:
    SET
    BORE - OVERSIZE:
    +0,010'
    STYLE:
    OEM REPLACEMENT
    $35.95
    Qty in Cart: 0
    Quantity:
    Price:
    $35.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Evolution 6164020

    Hastings HASTINGS Piston Rings - Evolution 6164020

    HASTINGS

    $35.95
    Piston rings are critical to engine sealing, compression retention, and oil control—failure here cascades into performance loss and catastrophic engine damage. Hastings Evolution rings deliver OEM-equivalent or superior sealing geometry with proven...
    DS750642
    SKU:
    DS750642
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    RIDING STYLE:
    STREET
    BORE SIZE IMPERIAL:
    3.518'
    BORE OVERSIZE - IMPERIAL:
    +0.020'
    RING MATERIAL:
    CAST
    STYLE:
    OEM REPLACEMENT
    BORE - OVERSIZE:
    +0,020'
    PRODUCT NAME:
    PISTON RING
    UNITS:
    SET
    $35.95
    Qty in Cart: 0
    Quantity:
    Price:
    $35.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Evolution 2M6164005

    Hastings HASTINGS Piston Rings - Evolution 2M6164005

    HASTINGS

    $49.95
    Piston rings are critical to engine sealing and compression—worn or inadequate rings lead to blowby, oil consumption, and power loss. The Hastings Evolution 2M6164005 delivers the precision ring geometry and material quality needed to maintain peak...
    DS750653
    SKU:
    DS750653
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE - OVERSIZE:
    +0,005'
    BORE SIZE IMPERIAL:
    3.503'
    PRODUCT NAME:
    PISTON RING
    STYLE:
    OEM REPLACEMENT
    BORE OVERSIZE - IMPERIAL:
    +0.005'
    UNITS:
    SET
    RIDING STYLE:
    STREET
    RING MATERIAL:
    MOLY COATED
    $49.95
    Qty in Cart: 0
    Quantity:
    Price:
    $49.95
    Subtotal:
  • Hastings HASTINGS Piston Rings - Evolution 6164005

    Hastings HASTINGS Piston Rings - Evolution 6164005

    HASTINGS

    $35.95
    Piston rings are critical to engine sealing and performance—they control blow-by, regulate oil consumption, and maintain compression under extreme combustion pressures. The Hastings Evolution 6164005 delivers proven durability and reliable sealing...
    DS750654
    SKU:
    DS750654
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    PRODUCT NAME:
    PISTON RING
    RING MATERIAL:
    CAST
    STYLE:
    OEM REPLACEMENT
    BORE OVERSIZE - IMPERIAL:
    +0.040'
    BORE - OVERSIZE:
    +0,040'
    BORE SIZE IMPERIAL:
    3.503'
    RIDING STYLE:
    STREET
    UNITS:
    SET
    $35.95
    Qty in Cart: 0
    Quantity:
    Price:
    $35.95
    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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