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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JAMES GASKET Float Bowl O-Ring - XL,F 27889-78
JAMES GASKET
$21.00A properly sealed float bowl is critical to consistent fuel delivery and carburetor performance—any leak or degradation directly impacts your engine's tuning stability and fuel economy. The JAMES GASKET Float Bowl O-Ring is engineered to maintain a...DS174448- SKU:
- DS174448
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- APPLICATION:
- FLOAT BOWL
- PRODUCT NAME:
- O-RING
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL
- APPLICATION:
- CARBURETOR
$21.00 -
JAMES GASKET Starter Housing Gasket 60559-80
JAMES GASKET
$13.90A leaking starter housing gasket compromises engine reliability and can lead to costly oil seepage and potential starter failure. The JAMES GASKET Starter Housing Gasket 60559-80 provides a precision seal that maintains crankcase integrity and ensures...DS174443- SKU:
- DS174443
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- STREET
- TYPE:
- STARTER HOUSING
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
$13.90 -
JAMES GASKET Starter Housing to Trans Gasket 31321-80
JAMES GASKET
$15.60A quality starter housing to transmission gasket is critical for preventing fluid seepage and maintaining proper engine bay cleanliness. This JAMES GASKET OEM-specification gasket ensures a reliable seal between your starter housing and transmission,...DS174442- SKU:
- DS174442
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- STREET
- TYPE:
- STARTER HOUSING
- MOUNTING POSITION:
- MIDDLE
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
$15.60 -
On Sale
JAMES GASKET Electric Start Hole Gasket 60518-65
JAMES GASKET
Now: $5.00Was: $8.40A properly sealed electric start hole is critical to maintaining crankcase integrity and preventing oil seepage that compromises engine performance and longevity. The JAMES GASKET Electric Start Hole Gasket 60518-65 delivers a precision fit that...DS174440- SKU:
- DS174440
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- STARTER HOUSING
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
Now: $5.00Was: $8.40 -
JAMES GASKET Distributor Base Gasket - Big Twin 32521-36
JAMES GASKET
$5.80A compromised distributor base gasket leads to oil leaks, ignition timing issues, and potential engine damage on your Big Twin. The JAMES GASKET Distributor Base Gasket uses advanced MicroPore technology to deliver a reliable, long-lasting seal that...DS174436- SKU:
- DS174436
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- CIRCUIT BREAKER COVER
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- DISTRIBUTOR BASE
- UNITS:
- 10 PACK
$5.80 -
JAMES GASKET Point Cover Gasket 32591-80
JAMES GASKET
$7.10A leaking point cover gasket compromises your Shovelhead's reliability and leaves oil residue on your cases—a clear sign it's time for replacement. JAMES gaskets are engineered to OEM specifications, ensuring a proper seal that keeps oil where it belongs...DS174435- SKU:
- DS174435
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- CIRCUIT BREAKER COVER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$7.10 -
JAMES GASKET Oil Pump Shaft End C-Clip - Big Twin 26348-36
JAMES GASKET
$11.70A worn or missing oil pump shaft C-clip compromises lubrication reliability and can lead to catastrophic engine damage on Big Twin platforms. This genuine JAMES GASKET replacement ensures proper shaft retention and consistent oil delivery under all...DS174433- SKU:
- DS174433
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- C-CLIP
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
$11.70 -
JAMES GASKET Oil Pump Body to Motor Gasket - 80" 26276-92
JAMES GASKET
$12.00An engine oil leak at the pump-to-motor junction can compromise lubrication efficiency and lead to costly damage. The JAMES GASKET Oil Pump Body to Motor Gasket ensures a reliable seal, maintaining optimal oil pressure and protecting your engine's...DS174432- SKU:
- DS174432
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
$12.00 -
JAMES GASKET Oil Pump Body to Motor Gasket - 80" 26273-92
JAMES GASKET
$12.00A properly sealed oil pump body is critical to maintaining consistent oil pressure and preventing leaks that compromise engine performance. This JAMES GASKET oil pump body to motor gasket ensures a precision seal between your pump and motor block,...DS174431- SKU:
- DS174431
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
$12.00 -
JAMES GASKET Inspection Cover Gasket - FL/FX 60567-65
JAMES GASKET
$12.00Inspection cover gaskets are critical sealing components that prevent oil seepage and contamination at your engine's access points. A failed or deteriorated gasket can lead to slow oil weeps that accumulate dirt and moisture, compromising engine...DS174430- SKU:
- DS174430
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- INSPECTION COVER
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS IMPERIAL:
- 0,032'
$12.00 -
JAMES GASKET Oil Pump Body Gasket - Big Twin 26273-80AM
JAMES GASKET
$19.30Oil leaks compromise engine efficiency and create costly maintenance headaches—a quality gasket is your first line of defense against seepage that degrades performance. The JAMES GASKET Oil Pump Body Gasket is engineered to seal critical pressure points...DS174429- SKU:
- DS174429
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- MYLAR
- RIDING STYLE:
- STREET
- STYLE:
- BODY
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
$19.30 -
JAMES GASKET Oil Pump Cover Gasket - Big Twin 26258-68-B
JAMES GASKET
$19.30A leaking oil pump cover gasket can turn a routine ride into an expensive engine failure. This JAMES GASKET replacement seals the gap between your oil pump and cover, preventing oil seepage that compromises lubrication and cleanliness. For Big Twin...DS174428- SKU:
- DS174428
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- MYLAR
- STYLE:
- COVER
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
$19.30 -
JAMES GASKET Oil Pump Gasket - Big Twin 26246-68-A
JAMES GASKET
$16.83An oil pump gasket is a critical sealing component that prevents oil leakage at the pump housing—neglecting this maintenance item can lead to oil starvation, engine damage, and costly repairs. JAMES GASKET's Big Twin gasket is engineered to exact OEM...DS174427- SKU:
- DS174427
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- MATERIAL:
- MYLAR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- STYLE:
- BODY
$16.83 -
JAMES GASKET Oil Pump Cap Washer - FL 26231-78
JAMES GASKET
$11.10A degraded or missing oil pump cap washer compromises your engine's sealing integrity and can lead to oil leakage, contamination, and pressure loss under race or road conditions. JAMES GASKET's OEM-specification washer restores proper sealing at the oil...DS174426- SKU:
- DS174426
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- TEFLON
- PRODUCT NAME:
- WASHER
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP CAP
$11.10 -
JAMES GASKET Felt Pad - Panhead 17507-48
JAMES GASKET
$32.90Rocker cover gasket leaks compromise engine aesthetics and can lead to oil seepage that attracts dirt and debris. These OEM-specification felt pads restore a proper seal between your rocker covers and cylinder head, eliminating weeping and maintaining...DS174425- SKU:
- DS174425
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- UNITS:
- 10 PACK
- TYPE:
- ROCKER COVER
- RIDING STYLE:
- STREET
- MATERIAL:
- FELT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
$32.90 -
JAMES GASKET Lower Rocker Cover Gasket - Big Twin 17355-92
JAMES GASKET
$42.80A reliable rocker cover gasket is critical to preventing oil seepage and maintaining engine integrity on your Big Twin. The JAMES GASKET Lower Rocker Cover Gasket combines proven elastomer sealing technology with precision engineering to deliver a...DS174423- SKU:
- DS174423
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MOUNTING POSITION:
- LOWER
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- MATERIAL:
- RUBBER
$42.80 -
JAMES GASKET Cam Cover Gasket - Knucklehead EL 25225-36-A
JAMES GASKET
$29.10Cam chest leaks compromise engine sealing and can lead to oil loss, contamination, and potential engine damage over time. The JAMES GASKET Cam Cover Gasket delivers reliable, long-lasting sealing for your Knucklehead EL engine, restoring a proper seal...DS174422- SKU:
- DS174422
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- THICKNESS:
- 0,51 MM (0,020')
- PRODUCT NAME:
- GASKET
- TYPE:
- CAM COVER
- UNITS:
- 10 PACK
$29.10 -
JAMES GASKET Magneto Plate Oil Seal - XLCH 12023
JAMES GASKET
$22.10The magneto plate oil seal is a critical component that prevents crankcase oil from leaking past your ignition system—a common failure point on vintage Harley engines. A compromised seal forces you to constantly top off oil levels and risks contaminating...DS174421- SKU:
- DS174421
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
- APPLICATION:
- MAGNETO MOUNTING
- APPLICATION:
- PUSHROD COVER
$22.10 -
JAMES GASKET Rear Cylinder Base Gasket - Big Twin 16777-48
JAMES GASKET
$16.60A leaking rear cylinder base gasket compromises engine sealing and can lead to costly oil weeping and potential internal damage. The JAMES GASKET Rear Cylinder Base Gasket eliminates guesswork with a precision-engineered design that seats reliably...DS174420- SKU:
- DS174420
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 0.81 MM
$16.60 -
JAMES GASKET Rubber Upper Rocker Cover Gasket - Big Twin 17356-92
JAMES GASKET
$42.80A faulty rocker cover gasket compromises engine sealing and invites oil leaks that can damage your engine bay and cost you race time. The JAMES GASKET rubber upper rocker cover gasket eliminates guesswork with precision engineering—a steel core...DS174419- SKU:
- DS174419
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- GASKET
- MOUNTING POSITION:
- UPPER
- UNITS:
- 5 PACK
- MATERIAL:
- RUBBER
$42.80
