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 Intake to Cab Seal C9088F5
COMETIC
$24.60Intake manifold gasket leaks compromise combustion efficiency and create vacuum losses that rob your engine of power and responsiveness. The COMETIC Intake to Cab Seal C9088F5 eliminates these leaks with a precision-engineered, U.S.-manufactured gasket...09350157- SKU:
- 09350157
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
- MATERIAL:
- NITRILE RUBBER
- PRODUCT NAME:
- SEAL
- UNITS:
- 5 PACK
- APPLICATION:
- INTAKE MANIFOLD TO CARBURETOR
- RIDING STYLE:
- STREET
$24.60Qty in Cart: 0Quantity:Price:$24.60Subtotal: -
COMETIC Sprocket Shaft Oil Seal C9632
COMETIC
$24.60A failing sprocket shaft oil seal is a silent reliability killer—once it starts weeping, contamination spreads quickly and catastrophic engine damage follows. The COMETIC Sprocket Shaft Oil Seal C9632 is engineered to maintain a tight, consistent seal...09350154- SKU:
- 09350154
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
- APPLICATION:
- CRANKCASE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- APPLICATION:
- SPROCKET SHAFT
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
$24.60 -
COMETIC Lower Pushrod O-Ring C9293
COMETIC
$6.40A leaking pushrod seal doesn't just cost you horsepower—it compromises engine reliability and invites catastrophic failure. The COMETIC Lower Pushrod O-Ring C9293 delivers the precision sealing your engine demands, engineered with fuel-resistant Viton®...09350150- SKU:
- 09350150
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- PUSHROD COVER
- MATERIAL:
- NITRILE RUBBER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- O-RING
- UNITS:
- 25 PACK
$6.40 -
COMETIC Upper Pushrod Cover O-Ring C9294
COMETIC
$8.10A properly sealed upper pushrod cover is critical to preventing oil seepage and maintaining engine bay cleanliness on high-performance builds. The COMETIC C9294 uses premium Viton® gaskets with a stainless steel core to deliver reliable, long-term...09350148- SKU:
- 09350148
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- UPPER PUSHROD
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MATERIAL:
- VITON
- PRODUCT NAME:
- O-RING
$8.10 -
COMETIC Rocker Arm Support O-Ring C9629
COMETIC
$3.95Rocker arm support seals are critical to maintaining proper oil pressure and preventing leakage in high-performance engines where reliability is non-negotiable. COMETIC's C9629 O-Ring is engineered from premium fuel-resistant elastomers that resist...09350147- SKU:
- 09350147
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- ROCKER ARM
- RIDING STYLE:
- STREET
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- THICKNESS IMPERIAL:
- 0.020'
- UNITS:
- 10 PACK
- PRODUCT NAME:
- O-RING
- THICKNESS:
- 0,020'
$3.95 -
JAMES GASKET Shifter Shaft Seal 37107-06
JAMES GASKET
$18.70A leaking shifter shaft seal transforms a minor annoyance into a major maintenance headache—fluid seepage leads to corrosion, sluggish shifting, and accelerated wear on internal components. The JAMES GASKET Shifter Shaft Seal 37107-06 is engineered to...09350110- SKU:
- 09350110
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- APPLICATION:
- GEAR SHIFT LEVER
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$18.70 -
JAMES GASKET Inspection Cover Gasket - XL 34986-04
JAMES GASKET
$9.10Inspection cover gaskets are critical sealing components that prevent oil seepage and contamination at your engine's inspection points. A failing gasket compromises engine cleanliness and can lead to costly oil loss over time. The JAMES GASKET Inspection...09350109- SKU:
- 09350109
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- MATERIAL:
- RUBBER
- TYPE:
- INSPECTION COVER
- UNITS:
- 5 PACK
$9.10 -
JAMES GASKET Speedo Gear Seal 67096-87
JAMES GASKET
$10.95A leaking speedometer drive gear seal doesn't just compromise your instrument accuracy—it allows fluid to seep into your gauge cluster and can lead to costly electrical damage. The JAMES GASKET Speedo Gear Seal 67096-87 is an OEM-specification...09346502- SKU:
- 09346502
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- TYPE:
- SPEEDOMETER DRIVE
- RIDING STYLE:
- STREET
$10.95 -
JAMES GASKET Exhaust Gasket 65927-00
JAMES GASKET
$13.95A properly sealed exhaust manifold is critical to maintaining peak engine performance and preventing costly exhaust leaks that compromise horsepower and fuel efficiency. The JAMES GASKET Exhaust Gasket 65927-00 delivers dependable sealing in...09346501- SKU:
- 09346501
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
- UNITS:
- 2 PACK
$13.95 -
JAMES GASKET Exhaust Gasket 65324-83-CG-2
JAMES GASKET
$8.95A quality exhaust gasket is critical to maintaining proper combustion chamber sealing and preventing exhaust leaks that rob power and increase emissions. The JAMES GASKET 65324-83-CG-2 delivers OEM-grade reliability with domestic manufacturing standards,...09346498- SKU:
- 09346498
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
$8.95 -
JAMES GASKET Exhaust Gasket 65324-83-2
JAMES GASKET
$12.95A properly sealed exhaust gasket is critical for maintaining system integrity and preventing exhaust leaks that rob horsepower and increase emissions. The JAMES GASKET Exhaust Gasket 65324-83-2 delivers OEM-quality sealing with U.S.-made durability,...09346497- SKU:
- 09346497
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
$12.95 -
COMETIC Complete Engine/Primary Gasket Set C10271
COMETIC
$340.15A complete gasket set is the foundation of engine reliability—without proper sealing, you're risking compression loss, coolant leaks, and catastrophic failure. The COMETIC C10271 delivers race-proven sealing across your entire engine and primary...09346332- SKU:
- 09346332
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- BORE SIZE:
- 4,075'
- TYPE:
- COMPLETE
$340.15Qty in Cart: 0Quantity:Price:$340.15Subtotal: -
COMETIC Complete Engine/Primary Gasket Set C10266
COMETIC
$340.15A complete engine gasket set is foundational to maintaining compression integrity and preventing fluid leakage across critical engine surfaces. The COMETIC C10266 delivers multi-layer steel head gaskets and premium Viton sealing materials that handle...09346330- SKU:
- 09346330
- Availability:
- Ships Same Business Day
- Weight:
- 1.86 LBS
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- BORE SIZE:
- 4,250'
- PRODUCT NAME:
- GASKET
$340.15 -
COMETIC Complete Engine/Primary Gasket Set C10260
COMETIC
$330.70A complete gasket set is non-negotiable for any engine rebuild or head work—it's your seal against compression loss, coolant leaks, and oil seepage that can compromise performance and reliability. COMETIC's C10260 pairs OEM-grade multi-layer steel head...09346329- SKU:
- 09346329
- Availability:
- Ships Same Business Day
- Weight:
- 1.91 LBS
- TYPE:
- COMPLETE
- UNITS:
- KIT
- BORE SIZE:
- 3,937'
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
$330.70 -
COMETIC Primary Gasket C10241F5
COMETIC
$120.50A quality primary gasket is foundational to engine reliability—poor sealing leads to oil leaks, pressure loss, and catastrophic failures that sideline your build. The COMETIC Primary Gasket C10241F5 is engineered to maintain a pressure-tight seal across...09346321- SKU:
- 09346321
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- THICKNESS METRIC:
- 0.81 MM
- MOUNTING POSITION:
- OUTER
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.032'
- TYPE:
- PRIMARY
$120.50 -
COMETIC Base Gasket C10242
COMETIC
$33.55A head gasket failure can sideline your engine and drain your wallet. The COMETIC Base Gasket C10242 uses advanced multi-layer steel (MLS) construction with load control embossments to maintain consistent clamping force across the sealing surface,...09346319- SKU:
- 09346319
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER BASE
- UNITS:
- KIT
$33.55 -
COMETIC Intake/Manifold Gasket - M8 C10247
COMETIC
$41.95A compromised intake gasket leads to vacuum leaks, rough idle, and performance loss—problems that compound quickly in high-output engines. The COMETIC C10247 delivers the durability and reliability that professionals depend on, engineered to handle...09346317- SKU:
- 09346317
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- INTAKE MANIFOLD
$41.95Qty in Cart: 0Quantity:Price:$41.95Subtotal: -
COMETIC Lower Rocker Box Gaskets C10183
COMETIC
$27.25Rocker box gaskets are critical sealing components that prevent oil leakage and maintain proper engine lubrication under high RPM conditions. COMETIC's Viton gaskets deliver superior temperature resistance and durability compared to stock alternatives,...09345950- SKU:
- 09345950
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- UNITS:
- 2 PACK
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- MATERIAL:
- RUBBER
- MOUNTING POSITION:
- LOWER
$27.25 -
COMETIC Cylinder Head Gasket C10182
COMETIC
$61.90A quality cylinder head gasket is non-negotiable for maintaining compression and preventing coolant leakage under extreme operating conditions. The COMETIC C10182 delivers the durability and precision fit demanded by high-performance engines, whether...09345948- SKU:
- 09345948
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- BORE SIZE:
- 4,320'
- BORE SIZE IMPERIAL:
- 4.320'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- LAYERED STEEL
- UNITS:
- 2 PACK
- THICKNESS IMPERIAL:
- 0,040'
- TYPE:
- CYLINDER HEAD
- THICKNESS METRIC:
- 1.02 MM
$61.90 -
COMETIC Cylinder Head/Base Gasket C10181HB030020
COMETIC
$78.70A cylinder head gasket is your engine's first line of defense against combustion pressure, coolant crossover, and oil leakage—failure here means catastrophic engine damage. The COMETIC C10181HB030020 uses Multi-Layer Steel (MLS) construction to maintain...09345947- SKU:
- 09345947
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- THICKNESS:
- 0,76 MM (0,030')
- BORE SIZE:
- 4,250'
- BORE SIZE IMPERIAL:
- 4.250'
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.51 MM
- THICKNESS METRIC:
- 0.76 MM
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 0,51 MM (0,020')
- TYPE:
- CYLINDER BASE
- TYPE:
- CYLINDER HEAD
- UNITS:
- KIT
$78.70
