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
-
JAMES GASKET Top End Gasket Kit - XL 17049-07-X
JAMES GASKET
$131.95A top-end rebuild demands precision-engineered gaskets and seals that won't fail under high RPM loads. JAMES GASKET's complete Top End Gasket Kit eliminates the guesswork of sourcing individual...09342095- SKU:
- 09342095
- Availability:
- Ships Same Business Day
- Weight:
- 0.86 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
$131.95 -
COMETIC Carb Back Plate Gasket C9492
COMETIC
$19.40A reliable carb back plate gasket is critical to maintaining proper fuel system integrity and preventing costly air leaks that compromise engine performance. The COMETIC C9492 eliminates the...09342061- SKU:
- 09342061
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 1.52 MM
- TYPE:
- THROTTLE HOUSING
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS IMPERIAL:
- 0.060'
$19.40 -
COMETIC Primary to Transmission Gasket - .031" C9339
COMETIC
$55.30A leaking primary-to-transmission gasket can compromise engine sealing, waste fluids, and undermine the reliability of your build. COMETIC's precision-engineered gasket eliminates common leak points...09341653- SKU:
- 09341653
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,79 MM (0,031')
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- TYPE:
- CHAIN COVER
- TYPE:
- TRANSMISSION
- MATERIAL:
- FIBER
- THICKNESS IMPERIAL:
- 0,031'
$55.30Qty in Cart: 0Quantity:Price:$55.30Subtotal: -
COMETIC Oil Pump Body Gasket C9383-010
COMETIC
$12.70A failing oil pump gasket compromises your engine's lubrication system, risking catastrophic bearing wear and seizure. The COMETIC Oil Pump Body Gasket C9383-010 delivers OEM-grade sealing...09341651- SKU:
- 09341651
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- THICKNESS IMPERIAL:
- 0,010'
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS METRIC:
- 0.25 MM
- TYPE:
- OIL PUMP BODY
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
$12.70 -
COMETIC Oil Pump Body Gasket C9381-010
COMETIC
$12.70A properly sealed oil pump is critical to maintaining consistent oil pressure and preventing catastrophic engine damage from oil starvation. The COMETIC Oil Pump Body Gasket C9381-010 delivers a...09341650- SKU:
- 09341650
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- OIL PUMP BODY
- UNITS:
- 10 PACK
- MATERIAL:
- RUBBER
- THICKNESS METRIC:
- 0.25 MM
$12.70Qty in Cart: 0Quantity:Price:$12.70Subtotal: -
COMETIC Cam Cover Gasket - .031" C9302
COMETIC
$14.90A leaking cam cover gasket compromises engine cleanliness and can lead to oil seepage onto critical engine components. COMETIC's .031" gasket delivers reliable sealing performance with superior...09341649- SKU:
- 09341649
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- TYPE:
- CAM COVER
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- 5 PACK
$14.90Qty in Cart: 0Quantity:Price:$14.90Subtotal: -
COMETIC Cam Cover Gasket - .032" C9302F5-032
COMETIC
$23.50A failing cam cover gasket is a one-way ticket to oil leaks, contaminated spark plugs, and engine bay mess. COMETIC's .032" gasket delivers reliable sealing with superior material composition...09341648- SKU:
- 09341648
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,032'
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CAM COVER
$23.50 -
COMETIC Cam Cover Gasket - .031" C9328
COMETIC
$18.10A leaking cam cover gasket compromises engine efficiency and invites contamination into your valve train—two problems you can't afford in a high-performance build. The COMETIC C9328 delivers the...09341647- SKU:
- 09341647
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS METRIC:
- 0.79 MM
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,031'
- TYPE:
- CAM COVER
$18.10 -
COMETIC Rear Tappet Block Gasket C9297
COMETIC
$5.30A leaking rear tappet block gasket will compromise your engine's oil pressure stability and create costly internal seepage that degrades performance over time. COMETIC's precision-engineered gasket...09341644- SKU:
- 09341644
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- FIBER
- MOUNTING POSITION:
- REAR
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
- TYPE:
- TAPPET BLOCK
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,51 MM (0,020')
$5.30 -
JAMES GASKET Oil Pump Gasket Kit - XL 04-XL
JAMES GASKET
$21.95A compromised oil pump gasket can lead to catastrophic oil loss and engine damage during high-stress racing conditions or extended driving sessions. This comprehensive rebuild kit gives you the...09341637- SKU:
- 09341637
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- OIL PUMP
- RIDING STYLE:
- STREET
$21.95 -
JAMES GASKET Tail Lamp Gasket Kit 68123-55-K
JAMES GASKET
$11.95Tail lamp gasket failure leads to moisture intrusion, corroded housings, and electrical shorts that compromise safety and aesthetics. A quality gasket kit prevents water seepage and restores a proper...09341636- SKU:
- 09341636
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET KIT
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- TAIL LAMP MOUNTING
- UNITS:
- KIT
$11.95 -
COMETIC Bearing Housing Gasket C9264F
COMETIC
$24.90Bearing housing gaskets are critical sealing components that prevent oil leakage and maintain proper pressure in your engine's bearing system. The COMETIC C9264F uses advanced Aluminum Foamette...09341383- SKU:
- 09341383
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS IMPERIAL:
- 0,032'
- TYPE:
- BEARING HOUSING
- UNITS:
- 10 PACK
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.81 MM
$24.90 -
COMETIC Thin Cover Gasket C9983F
COMETIC
$18.90The COMETIC Thin Cover Gasket C9983F eliminates the guesswork from valve cover sealing with a pre-formed gasket that delivers consistent, reliable performance across repeated heat cycles. Its...09341381- SKU:
- 09341381
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- TRANSMISSION TOP COVER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
$18.90 -
COMETIC Top Cover Gasket C9516-032AFM
COMETIC
$5.30Top-end gasket failures cost you power, reliability, and track time. The COMETIC C9516-032AFM delivers the sealing integrity your high-output 4-stroke demands, whether you're running naturally...09341379- SKU:
- 09341379
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,032'
- TYPE:
- TRANSMISSION TOP COVER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.81 MM
$5.30 -
COMETIC Shift Adapter Gasket C9521F
COMETIC
$5.30A reliable shift adapter gasket is critical to maintaining a sealed, leak-free transmission system under racing conditions and high-performance driving. The COMETIC C9521F eliminates the guesswork...09341377- SKU:
- 09341377
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- SHIFTER ADAPTER PLATE
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 0.81 MM
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$5.30 -
COMETIC Complete Gasket Kit - XL1200 C9176
COMETIC
$288.70A complete gasket kit eliminates the gamble of mixing OEM and aftermarket gaskets—you get a matched set engineered to work together and hold pressure across your entire engine. Cometic's multi-layer...09341224- SKU:
- 09341224
- Availability:
- Ships Same Business Day
- Weight:
- 1.64 LBS
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- MATERIAL:
- STEEL
- UNITS:
- KIT
$288.70Qty in Cart: 0Quantity:Price:$288.70Subtotal: -
COMETIC Trans Gasket Kit - FL C9175
COMETIC
$102.85A transmission gasket failure doesn't just leak fluid—it compromises shift quality, wastes performance, and leaves you stranded. The COMETIC Trans Gasket Kit C9175 gives you OEM-equivalent sealing...09341223- SKU:
- 09341223
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
$102.85 -
COMETIC Trans Gasket Kit - Softail C9174
COMETIC
$102.85Transmission gasket failure is one of the most common culprits behind fluid leaks and loss of shift quality in Softail models. The COMETIC Trans Gasket Kit C9174 eliminates guesswork by providing...09341222- SKU:
- 09341222
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- GASKET KIT
$102.85 -
COMETIC Primary Gasket Kit C9173
COMETIC
$121.75Primary gasket failure is one of the most common culprits behind oil leaks and pressure loss in high-performance engines. The COMETIC Primary Gasket Kit C9173 eliminates this vulnerability with...09341221- SKU:
- 09341221
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- TYPE:
- PRIMARY
$121.75Qty in Cart: 0Quantity:Price:$121.75Subtotal: -
COMETIC Complete Gasket Kit - Softail C9171
COMETIC
$287.65A complete gasket failure can cost you a race day—or worse, leave you stranded mid-season. The COMETIC Complete Gasket Kit for Softail models delivers OEM-quality sealing across your entire engine,...09341219- SKU:
- 09341219
- Availability:
- Ships Same Business Day
- Weight:
- 1.89 LBS
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- STEEL
- UNITS:
- KIT
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- BORE SIZE:
- 3,750'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$287.65
