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
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DRAG SPECIALTIES Points Cover - Black 78041B
DRAG SPECIALTIES
$29.63Keep your ignition system protected while maintaining a cohesive aesthetic on your motorcycle. This die-cast points cover delivers OEM-quality durability with the clean, aggressive look of Drag...09401615- SKU:
- 09401615
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- STYLE:
- CHROME SKULL
- TYPE:
- POINTS
$29.63 -
DRAG SPECIALTIES Points Cover - Chrome 78041
DRAG SPECIALTIES
$28.57A quality points cover protects your ignition system from moisture, dirt, and road debris while maintaining a clean, finished appearance on your engine bay. Whether you're running a classic cruiser...09401614- SKU:
- 09401614
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- STYLE:
- BLACK SKULL
- PRODUCT NAME:
- COVER
- TYPE:
- POINTS
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- MATERIAL:
- DIE-CAST
$28.57 -
DRAG SPECIALTIES Points Cover - Black 78040B
DRAG SPECIALTIES
$29.63A quality points cover protects your ignition system from road debris and moisture while delivering a finished look that complements your bike's aesthetic. If you're running Drag Specialties Split...09401613- SKU:
- 09401613
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- COVER
- TYPE:
- POINTS
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- MATERIAL:
- DIE-CAST
- STYLE:
- CHROME SKULL
$29.63 -
On Sale
JAMES GASKET Piston Liner O-Ring - 4 Pack ST-11900027
JAMES GASKET
MSRP: $20.95Now: $13.00Was: $20.95Piston liner O-rings are critical sealing components that prevent fluid leakage and maintain pressure integrity in high-performance engine applications. A compromised O-ring can lead to loss of boost...09351071- SKU:
- 09351071
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- PISTON
- PRODUCT NAME:
- O-RING
- TYPE:
- PISTON LINER
- UNITS:
- KIT
MSRP: $20.95Now: $13.00Was: $20.95 -
JAMES GASKET Breather O-Ring - M8 JGI-11900116
JAMES GASKET
$13.10A properly sealed breather system is critical for maintaining crankcase pressure and preventing oil leakage in high-performance engines. This James Gasket O-Ring ensures a reliable, leak-free seal at...09350985- SKU:
- 09350985
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- O-RING
- MATERIAL:
- RUBBER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$13.10 -
JAMES GASKET Sprocket Shaft Seal JGI-11000134
JAMES GASKET
$15.40A compromised sprocket shaft seal is a direct path to oil leakage, internal contamination, and premature drivetrain wear. The JAMES GASKET Sprocket Shaft Seal JGI-11000134 delivers OEM-grade sealing...09350984- SKU:
- 09350984
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- SPROCKET SHAFT
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$15.40 -
JAMES GASKET Engine Inner Primary Seal JGI-25600455
JAMES GASKET
$24.95An engine's inner primary seal is critical to preventing oil seepage that can compromise performance and create messy maintenance headaches. The JAMES GASKET Engine Inner Primary Seal JGI-25600455...09350983- SKU:
- 09350983
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- APPLICATION:
- INNER PRIMARY
- UNITS:
- EACH
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
$24.95 -
JAMES GASKET Engine to Trans Seal - M8 JGI-24400215
JAMES GASKET
$13.95A leaking engine-to-transmission seal can silently compromise your entire drivetrain, causing fluid loss, contamination, and catastrophic failure. The JAMES GASKET M8 seal delivers OEM-grade...09350982- SKU:
- 09350982
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- ENGINE
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$13.95 -
JAMES GASKET Shifter Shaft Seal - M8 JGI-11000101
JAMES GASKET
$7.95A leaking shifter shaft seal compromises transmission fluid integrity and can lead to costly internal damage. The JAMES GASKET Shifter Shaft Seal M8 is engineered to eliminate seepage and maintain...09350981- SKU:
- 09350981
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- SHIFTER SHAFT
- UNITS:
- EACH
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
$7.95 -
JAMES GASKET Intake Manifold Seal - M8 JGI-27300087
JAMES GASKET
$18.00An intake manifold seal that fails will compromise your engine's air-fuel mixture and create vacuum leaks that tank performance and fuel economy. The JAMES GASKET M8 intake manifold seal is...09350980- SKU:
- 09350980
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- INTAKE MANIFOLD
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$18.00 -
JAMES GASKET Valve Stem Seal - M8 JGI-18100044
JAMES GASKET
$7.80Valve stem seals are critical to preventing oil from leaking into your combustion chambers—a problem that causes blue smoke, fouled plugs, and lost compression. The JAMES GASKET M8 delivers OEM-grade...09350979- SKU:
- 09350979
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- TYPE:
- VALVE STEM
- PRODUCT NAME:
- SEAL
- UNITS:
- 8 PACK
$7.80 -
JAMES GASKET Cylinder Rocker Seal - M8 JGI-25700425
JAMES GASKET
$29.40Cylinder rocker seals are critical to maintaining oil containment and preventing leaks that compromise engine performance and longevity. A degraded or failed rocker seal allows oil to escape,...09350978- SKU:
- 09350978
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- APPLICATION:
- ROCKER COVER
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$29.40 -
COMETIC Module Kit O-Ring C10200
COMETIC
$8.35Precision sealing is non-negotiable in high-performance racing applications, and compromised gaskets mean lost boost, inconsistent fueling, and catastrophic engine damage. The COMETIC Module Kit...09350977- SKU:
- 09350977
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- INDUCTION MODULE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- UNITS:
- 4 PACK
$8.35Qty in Cart: 0Quantity:Price:$8.35Subtotal: -
COMETIC Transmission Top Cover Gasket C9267F
COMETIC
$18.60A transmission top cover gasket is critical to preventing fluid leakage and maintaining system integrity under pressure and heat cycles. The COMETIC C9267F eliminates the guesswork with a proven...09350220- SKU:
- 09350220
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- TYPE:
- TRANSMISSION TOP COVER
$18.60 -
COMETIC Oil Pan Gasket - AFM 10 C9490F
COMETIC
$33.70An oil pan gasket failure will leave you stranded and cost you thousands in engine damage. The COMETIC AFM 10 C9490F eliminates guesswork with a precision-engineered gasket that seals reliably across...09350217- SKU:
- 09350217
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.032'
- TYPE:
- TRANSMISSION
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PAN
- UNITS:
- 10 PACK
$33.70Qty in Cart: 0Quantity:Price:$33.70Subtotal: -
COMETIC Drive Gear Seal - 5 Pack C9514
COMETIC
$24.20Drive gear seals are critical to maintaining proper fluid retention and preventing contamination in your differential or transmission housing. A failed seal can result in oil weeping, fluid loss, and...09350213- SKU:
- 09350213
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
- APPLICATION:
- MAIN DRIVE GEAR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
$24.20 -
COMETIC Clutch Release Seal C9354
COMETIC
$5.95A failing clutch release seal compromises hydraulic pressure and creates costly leaks that degrade clutch engagement and damage surrounding components. The COMETIC C9354 is a precision-engineered...09350211- SKU:
- 09350211
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- CLUTCH RELEASE LEVER
- UNITS:
- EACH
- PRODUCT NAME:
- O-RING
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
$5.95 -
COMETIC Shifter Shaft Seal C9525
COMETIC
$10.60A leaking shifter shaft seal compromises transmission fluid integrity and can lead to costly internal damage if left unaddressed. The COMETIC C9525 provides a reliable OEM-quality replacement that...09350184- SKU:
- 09350184
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- SHIFTER SHAFT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
$10.60 -
COMETIC Solenoid Mount Foam Gasket C9702
COMETIC
$6.30The COMETIC Solenoid Mount Foam Gasket C9702 eliminates guesswork from critical seal points by combining durability with ease of installation—no gasket sealer required. Its aluminum core and...09350183- SKU:
- 09350183
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- FOAM
- THICKNESS IMPERIAL:
- 0.019'
- TYPE:
- STARTER
- THICKNESS:
- 0,019'
- RIDING STYLE:
- STREET
- TYPE:
- SOLENOID
$6.30 -
COMETIC Outer Oil Pump O-Ring C9437
COMETIC
$2.95Oil pump o-rings are a critical sealing component that directly impacts engine oil pressure and circulation. A compromised o-ring can lead to oil leakage, pressure loss, and accelerated engine wear...09350158- SKU:
- 09350158
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
- APPLICATION:
- OIL PUMP
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$2.95Qty in Cart: 0Quantity:Price:$2.95Subtotal:
