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
- DRAG SPECIALTIES Magnetic Ring Oil Filter - Chrome - 3-1/4" 140003HP-BX18 – Captures metal particles with pressure relief.
- WISECO Piston Kit .010 .883 XL K1656 – Forged aluminum with rings, pins, and circlips for rebuilds.
- DRAG SPECIALTIES Pushrod Tube Kit Big Twin 75711 – Includes tubes, clips, cups, and springs for complete engine.
- ULTRACOOL Below Regulator Mount Oil Cooler Stainless Steel RF-2CSS – Fits S&S 111/124/143 engines with machined adapter.
- PAUGHCO Ribbed Teardrop Air Cleaner 701-200 – Chrome-plated aluminum with mini filter.
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
-
COMETIC Engine Gasket Kit - Iron XL C9049F
COMETIC
$154.30A complete gasket kit is the foundation of a reliable engine build—skimping on gaskets is a common path to catastrophic failure. The COMETIC Iron XL C9049F delivers OEM-quality sealing across all...09344799- SKU:
- 09344799
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- BORE SIZE:
- 3,1875'
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.1875'
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
$154.30 -
FEULING OIL PUMP CORP. Sandwich Adapter Kit 2023
FEULING OIL PUMP CORP.
$25.95Remote oil cooling systems demand reliable mounting infrastructure, and the Feuling Oil Pump Corp. Sandwich Adapter Kit delivers exactly that. By integrating directly into your engine's oil gallery,...09344746- SKU:
- 09344746
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- OIL FILTER
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$25.95 -
COMETIC Case Saver Gasket C10125
COMETIC
$52.45If you're rebuilding a primary case or running high-heat conditions, gasket failure isn't an option—it costs you race time and credibility. The COMETIC Case Saver Gasket C10125 delivers the...09344745- SKU:
- 09344745
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MOUNTING POSITION:
- INNER
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS METRIC:
- 0.81 MM
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,032'
- TYPE:
- PRIMARY
$52.45Qty in Cart: 0Quantity:Price:$52.45Subtotal: -
COMETIC Complete Gasket Kit - Big Twin C10123-030
COMETIC
$287.65A complete gasket kit is the foundation of a reliable engine—one failed seal can compromise performance and lead to costly downtime. The Cometic C10123-030 combines purpose-built materials for each...09344744- SKU:
- 09344744
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.76 MM
- BORE SIZE:
- 3,937'
- BORE SIZE IMPERIAL:
- 3.937'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
$287.65Qty in Cart: 0Quantity:Price:$287.65Subtotal: -
COMETIC Cam Cover Gasket - XL C9332F-1
COMETIC
$15.70A leaking cam cover gasket compromises engine sealing and can lead to oil seepage that fouls spark plugs and degrades ignition performance. The COMETIC Cam Cover Gasket XL C9332F-1 delivers reliable,...09344682- SKU:
- 09344682
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- CAM COVER
- UNITS:
- EACH
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS METRIC:
- 1.52 MM
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.060'
$15.70Qty in Cart: 0Quantity:Price:$15.70Subtotal: -
COMETIC Magneto Cover Gasket C9327-5
COMETIC
$5.20A leaking magneto cover gasket compromises engine sealing and can lead to oil weeping, contamination, and potential ignition system issues. The COMETIC Magneto Cover Gasket C9327-5 delivers reliable,...09344681- SKU:
- 09344681
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- MAG COVER
- UNITS:
- 5 PACK
- MATERIAL:
- FIBER
- TYPE:
- IGNITION COVER
$5.20Qty in Cart: 0Quantity:Price:$5.20Subtotal: -
COMETIC Starter Housing Gasket C9324
COMETIC
$22.10A leaking starter housing gasket compromises engine reliability and can lead to costly oil seepage and starter failure. The COMETIC C9324 is engineered to maintain a perfect seal under demanding...09344679- SKU:
- 09344679
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 0.79 MM
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,79 MM (0,031')
- MATERIAL:
- FIBER
- TYPE:
- STARTER HOUSING
$22.10 -
COMETIC Generator Mount Gasket C9321
COMETIC
$4.20A failing generator mount gasket compromises engine sealing and can lead to coolant leaks, oil seepage, and potential overheating—especially under sustained racing conditions. The COMETIC C9321...09344675- SKU:
- 09344675
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- FIBER
- THICKNESS IMPERIAL:
- 0,020'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,51 MM (0,020')
- TYPE:
- GENERATOR
- THICKNESS METRIC:
- 0.51 MM
- UNITS:
- 5 PACK
$4.20Qty in Cart: 0Quantity:Price:$4.20Subtotal: -
COMETIC Primary Gasket C9318F5
COMETIC
$93.10A primary gasket failure can compromise your entire engine seal system and leave you sidelined. The COMETIC C9318F5 eliminates the guesswork with AFM technology engineered specifically for high-heat,...09344673- SKU:
- 09344673
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- PRIMARY
- UNITS:
- 5 PACK
$93.10Qty in Cart: 0Quantity:Price:$93.10Subtotal: -
COMETIC Primary Gasket C9318F1
COMETIC
$31.45If you're rebuilding a primary or running aggressive ignition timing, gasket failure isn't an option—it'll cost you a race day and thousands in engine damage. The COMETIC C9318F1 uses proprietary AFM...09344672- SKU:
- 09344672
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- PRIMARY COVER
- UNITS:
- EACH
- THICKNESS IMPERIAL:
- 0.060'
$31.45Qty in Cart: 0Quantity:Price:$31.45Subtotal: -
COMETIC Primary Gasket C9317F5
COMETIC
$74.30A properly sealed primary gasket is non-negotiable for maintaining oil pressure, preventing leaks, and ensuring reliable engine performance—especially in high-temperature racing applications. The...09344671- SKU:
- 09344671
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- 5 PACK
- MOUNTING POSITION:
- OUTER
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS METRIC:
- 1.52 MM
- TYPE:
- PRIMARY
$74.30Qty in Cart: 0Quantity:Price:$74.30Subtotal: -
COMETIC Primary Gasket C9317F1
COMETIC
$25.15A primary gasket failure doesn't just leak oil—it compromises engine sealing integrity and forces you off the track or out of the garage. The COMETIC C9317F1 uses AFM (Aluminum Foamette Material)...09344670- SKU:
- 09344670
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- PRIMARY
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- THICKNESS METRIC:
- 1.52 MM
- UNITS:
- EACH
- THICKNESS:
- 1,52 MM (0,060')
$25.15 -
JAMES GASKET Transmission Pan Gasket - FXD 26072-90-F
JAMES GASKET
$29.95A failing transmission pan gasket compromises your entire drivetrain by allowing fluid to escape, leading to low fluid levels, overheating, and potential transmission damage. This JAMES GASKET...09344638- SKU:
- 09344638
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL PAN
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- MATERIAL:
- FOAMET
$29.95 -
JAMES GASKET Primary Cover Gasket 34955-67-F5
JAMES GASKET
$156.00A leaking primary cover gasket compromises engine reliability and creates a messy workspace. The JAMES GASKET Primary Cover Gasket delivers OEM-equivalent sealing performance with reinforced silicone...09342114- SKU:
- 09342114
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- FEATURES:
- BEADED
- MATERIAL:
- FOAMET
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- STYLE:
- PRIMARY
- UNITS:
- 5 PACK
- TYPE:
- COVER
$156.00Qty in Cart: 0Quantity:Price:$156.00Subtotal: -
JAMES GASKET Primary Cover Gasket 34955-67-F
JAMES GASKET
$45.95A failing primary cover gasket compromises engine sealing and invites oil seepage that can damage your cases and create a mess in the engine bay. The JAMES GASKET Primary Cover Gasket delivers...09342113- SKU:
- 09342113
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- FEATURES:
- BEADED
- UNITS:
- EACH
- TYPE:
- COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- FOAMET
- STYLE:
- PRIMARY
$45.95 -
JAMES GASKET Tappet Cover Gasket - Twin Cam 18635-99-F
JAMES GASKET
$14.95Proper gasket sealing on your Twin Cam is non-negotiable for engine reliability and oil containment. This James complete kit eliminates guesswork by bundling all necessary seals and O-rings for a...09342108- SKU:
- 09342108
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- FOAMET
- MOUNTING POSITION:
- FRONT
- MOUNTING POSITION:
- REAR
- UNITS:
- SET
- TYPE:
- TAPPET COVER
- FEATURES:
- BEADED
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
$14.95 -
JAMES GASKET Rocker Cover Gasket - XL 17695-07
JAMES GASKET
$17.26A leaking rocker cover gasket compromises engine cleanliness and can mask deeper issues. The JAMES GASKET XL 17695-07 delivers a reliable, long-lasting seal using premium materials and precision...09342099- SKU:
- 09342099
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MOUNTING POSITION:
- INNER
$17.26 -
JAMES GASKET Outer Rocker Cover Gasket - XL 17362-07
JAMES GASKET
$37.20A compromised rocker cover gasket leads to oil seepage, engine bay mess, and potential contamination of critical engine components. The JAMES GASKET Outer Rocker Cover Gasket XL 17362-07 delivers a...09342098- SKU:
- 09342098
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- MOUNTING POSITION:
- OUTER
- TYPE:
- ROCKER BOX
$37.20 -
JAMES GASKET Rocker Cover Gasket - XL 17030-07-X
JAMES GASKET
$91.95A leaking rocker cover gasket compromises engine sealing and can lead to oil contamination of spark plugs and cylinder head components. The JAMES GASKET Rocker Cover Gasket XL 17030-07-X delivers...09342097- SKU:
- 09342097
- Availability:
- Ships Same Business Day
- Weight:
- 0.33 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- GASKET KIT
$91.95 -
JAMES GASKET Motor Gasket Kit - XL 17047-07-X
JAMES GASKET
$218.95A complete engine rebuild demands gaskets and seals that won't fail under pressure. The JAMES GASKET Motor Gasket Kit delivers OEM-grade components engineered to maintain compression, prevent oil...09342096- SKU:
- 09342096
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$218.95
