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 Clutch Cover Gasket - XL 37762-52
JAMES GASKET
$26.10A worn or failing clutch cover gasket can lead to oil seepage, contamination of your clutch assembly, and potential drivetrain damage. The JAMES GASKET Clutch Cover Gasket XL 37762-52 delivers reliable sealing with OEM-equivalent materials and precision...DS174020- SKU:
- DS174020
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- TYPE:
- CLUTCH COVER
$26.10 -
JAMES GASKET Primary Cover Gasket 34955-75
JAMES GASKET
$64.10A properly sealed primary cover is critical to maintaining crankcase pressure and preventing oil seepage that compromises engine cleanliness and performance. The JAMES GASKET Primary Cover Gasket delivers OEM-equivalent sealing with silicone beading...DS174015- SKU:
- DS174015
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$64.10 -
JAMES GASKET Primary Cover Gasket 34955-89
JAMES GASKET
$66.90A reliable primary cover gasket is foundational to maintaining crankcase sealing integrity and preventing oil leakage at a critical junction point. The JAMES GASKET Primary Cover Gasket 34955-89 delivers OEM-equivalent performance with silicone beading...DS174014- SKU:
- DS174014
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- PAPER
$66.90 -
JAMES GASKET Primary Cover Gasket 34955-67
JAMES GASKET
$49.50A failing primary cover gasket will compromise engine sealing and lead to oil leakage, reduced performance, and potential engine damage. The JAMES GASKET Primary Cover Gasket delivers OEM-equivalent reliability with enhanced silicone beading for superior...DS174010- SKU:
- DS174010
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- COVER
- STYLE:
- PRIMARY
- THICKNESS METRIC:
- 0.51 MM
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- UNITS:
- 10 PACK
$49.50 -
DRAG SPECIALTIES Replacement Hook Kit 173978-BX-LB2
DRAG SPECIALTIES
$22.95Display board hooks wear out, break, or get lost—leaving your workspace disorganized and your parts exposed. The DRAG Specialties Replacement Hook Kit restores functionality to your board with durable, reliable hooks designed for heavy-duty shop use...DS173978- SKU:
- DS173978
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- HOOK KIT
- RIDING STYLE:
- STREET
$22.95 -
JAMES GASKET Head Gasket - 4" - EVO 16773-96-X
JAMES GASKET
$66.95A quality head gasket is critical to maintaining cylinder pressure and preventing coolant leakage—two factors that directly impact engine reliability and performance. The JAMES GASKET 4" Head Gasket is engineered to withstand high combustion pressures...DS173542- SKU:
- DS173542
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,045'
- BORE SIZE:
- 4,000'
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.14 MM
- THICKNESS:
- 1,14 MM (0,045')
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
$66.95 -
JAMES GASKET Metal Base Gasket - 4" - Evo 16777-96-X
JAMES GASKET
$44.95A properly sealed metal base gasket is critical to preventing oil leaks and maintaining crankcase pressure in high-performance engines. The JAMES GASKET Metal Base Gasket eliminates the need for additional gasket sealers, giving you a cleaner, more...DS173541- SKU:
- DS173541
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- METAL
- PRODUCT NAME:
- GASKET
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- FEATURES:
- BEADED
- MATERIAL:
- RUBBER
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
$44.95 -
JAMES GASKET Head Gasket - .036" - Twin Cam 16787-99-X
JAMES GASKET
$34.95A head gasket failure can leave you stranded or worse—compromise engine integrity on race day. The JAMES GASKET Head Gasket delivers the OEM-quality sealing you need with the reliability serious builders trust. This .036" gasket is engineered to handle...DS173540- SKU:
- DS173540
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- -
- THICKNESS IMPERIAL:
- 0,036'
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.91 MM
- BORE SIZE IMPERIAL:
- 3.875'
- STYLE:
- STANDARD BORE
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- TYPE:
- CYLINDER HEAD
- UNITS:
- KIT
$34.95 -
JAMES GASKET Head Gasket - .045" - 95" - Twin Cam 16787-99
JAMES GASKET
$34.95A properly sealed head gasket is non-negotiable for engine reliability and performance. The James Gasket .045" design delivers precise compression containment for Twin Cam applications, preventing coolant and oil cross-contamination that can lead to...DS173539- SKU:
- DS173539
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- CYLINDER BASE
- TYPE:
- CYLINDER HEAD
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,045'
- THICKNESS METRIC:
- 1.14 MM
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- -
- RIDING STYLE:
- STREET
- STYLE:
- STANDARD BORE
$34.95 -
JAMES GASKET Carb Seal Ring - 44 mm 29639-99
JAMES GASKET
$52.95A leaking carb seal is a common culprit behind fuel seepage, performance loss, and potential engine damage. JAMES GASKET's 44 mm Carb Seal Ring delivers a complete kit with factory-spec seals to restore a proper fuel-tight seal at your carb-to-intake and...DS173538- SKU:
- DS173538
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- APPLICATION:
- CARBURETOR
- APPLICATION:
- INTAKE MANIFOLD
- THICKNESS:
- 44 MM
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 44 MM
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
$52.95 -
JAMES GASKET Intake Manifold Seal Kit - 44 mm 27002-00
JAMES GASKET
$17.95Intake manifold seals deteriorate over time, leading to vacuum leaks, rough idle, and inconsistent fuel delivery—all of which compromise engine performance and reliability. The JAMES GASKET 44 mm Intake Manifold Seal Kit eliminates these issues with...DS173537- SKU:
- DS173537
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- THICKNESS:
- 44 MM
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 44 MM
- STYLE:
- FOR SCREAMING EAGLE CARBS
- APPLICATION:
- INTAKE MANIFOLD TO CARBURETOR
- PRODUCT NAME:
- SEAL
$17.95 -
JAMES GASKET Main Seal Blue - Big Twin 12035-B
JAMES GASKET
$11.40A compromised main seal will cost you far more in engine damage than the price of preventative replacement. JAMES GASKET's main seal is engineered to maintain a perfect barrier against oil seepage, protecting your crankshaft and bearings from...DS173536- SKU:
- DS173536
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- TRANSMISSION
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
$11.40 -
JAMES GASKET Metal Teflon Inspection Gasket - Big Twin 34906-85-X
JAMES GASKET
$33.60Inspection cover leaks compromise engine cleanliness and can lead to oil seepage that damages surrounding components. The JAMES GASKET Metal Teflon Inspection Gasket delivers a factory-spec seal that stops leaks before they start, whether you're running...DS173535- SKU:
- DS173535
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- INSPECTION COVER
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
- THICKNESS:
- 1,14 MM (0,045')
- THICKNESS METRIC:
- 1.14 MM
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- MATERIAL:
- TEFLON
- THICKNESS IMPERIAL:
- 0,045'
$33.60 -
JAMES GASKET Top End Gasket Kit - 95" Twin Cam 17052-99-X
JAMES GASKET
$125.95A complete top-end gasket failure can sideline your 95" Twin Cam build and compromise engine integrity across multiple systems. This JAMES GASKET kit supplies all critical sealing components—gaskets, oil seals, and O-rings—needed for a proper engine...DS173532- SKU:
- DS173532
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,045'
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 1.14 MM
- UNITS:
- KIT
$125.95 -
JAMES GASKET Oil Pump Shaft Snap Ring - Big Twin 11002
JAMES GASKET
$6.30The oil pump shaft snap ring is a critical retention component in your Shovelhead cam chest that prevents pump shaft slippage and maintains proper oil circulation under load. A worn or missing snap ring compromises lubrication pressure and can lead to...DS173529- SKU:
- DS173529
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- RETAINING RING
$6.30 -
JAMES GASKET Remote Filter Seals 63800-48-K
JAMES GASKET
$20.95Engine contamination degrades oil quality and reduces component lifespan—a quality remote filter seal keeps your system clean and protected without compromise. If you're running a remote filtration setup, these JAMES GASKET seals are engineered to...DS173527- SKU:
- DS173527
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- SEAL KIT
- UNITS:
- KIT
- APPLICATION:
- OIL FILTER
- RIDING STYLE:
- STREET
$20.95 -
JAMES GASKET Primary Gasket Kit without Seal 60538-81-K
JAMES GASKET
$60.95A properly sealed primary gasket is critical to preventing oil leakage and maintaining crankcase pressure in your engine. The JAMES GASKET Primary Gasket Kit delivers OEM-equivalent or superior sealing performance with proven silicone beading technology,...DS173525- SKU:
- DS173525
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MATERIAL:
- SILICONE
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- FEATURES:
- BEADED
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$60.95 -
JAMES GASKET Oil Pump Kit - EL/E 36-FLH
JAMES GASKET
$16.95A properly functioning oil pump is non-negotiable for engine longevity on EL and E-series Harleys—inadequate oil delivery leads to bearing wear, increased friction, and premature failure. The JAMES GASKET Oil Pump Kit is engineered to restore OEM flow...DS173524- SKU:
- DS173524
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- KIT
$16.95 -
JAMES GASKET Interconnect Exhaust Gasket Dyna 65826-90
JAMES GASKET
$8.95Exhaust leaks rob your engine of power and introduce unwanted noise into your cabin. The JAMES GASKET Interconnect Exhaust Gasket seals the junction between your Dyna's primary pipes and manifold, ensuring combustion gases flow efficiently through your...DS173518- SKU:
- DS173518
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- STREET
- STYLE:
- CROSSOVER
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- TYPE:
- EXHAUST
$8.95Qty in Cart: 0Quantity:Price:$8.95Subtotal: -
JAMES GASKET Oil Pump Body Plug Brass Washer 6581
JAMES GASKET
$18.70A proper oil pump seal is critical to maintaining system pressure and preventing oil leakage that can compromise engine reliability. This JAMES GASKET brass washer ensures a tight, corrosion-resistant fit at the oil pump body plug—essential for engines...DS173516- SKU:
- DS173516
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- TYPE:
- PLUG
- MATERIAL:
- BRASS
- TYPE:
- OIL PUMP BODY
- UNITS:
- 10 PACK
$18.70
