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 Cam Cover Gasket Silicon - Big Twin 25225-93-X
JAMES GASKET
$26.00A leaking cam cover gasket compromises engine sealing and invites oil seepage that accelerates wear on critical valve train components. JAMES GASKET's silicon cam cover gasket delivers reliable sealing performance with superior heat resistance, keeping...DS174202- SKU:
- DS174202
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- CAM COVER
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
$26.00 -
JAMES GASKET Cam Cover Gasket Silicon - Big Twin 25225-70-X
JAMES GASKET
$26.00A leaking cam cover gasket compromises engine sealing and invites oil contamination into critical valve train components. The JAMES GASKET Cam Cover Gasket Silicon is engineered to restore a factory-tight seal on Big Twin cam chests, preventing oil...DS174201- SKU:
- DS174201
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- UNITS:
- 5 PACK
- MATERIAL:
- PAPER
- THICKNESS METRIC:
- 0.79 MM
- TYPE:
- CAM COVER
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS IMPERIAL:
- 0,031'
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
$26.00 -
JAMES GASKET Cam Cover Gasket - Big Twin 25225-70-B
JAMES GASKET
$28.30Cam chest gasket failure leads to oil weeping, contamination, and potential engine damage—a problem that demands immediate attention. The JAMES GASKET Cam Cover Gasket delivers OEM-equivalent sealing performance with superior material durability,...DS174200- SKU:
- DS174200
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- CAM COVER
- UNITS:
- 10 PACK
- THICKNESS IMPERIAL:
- 0,031'
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS METRIC:
- 0.79 MM
$28.30 -
JAMES GASKET Push Rod Cover Cork - XL 17955-36-D
JAMES GASKET
$7.95Push rod cover leaks compromise engine cleanliness and can lead to costly oil seepage issues that deteriorate gasket integrity over time. The JAMES GASKET Push Rod Cover Cork delivers OEM-grade sealing performance with a proven cork composition designed...DS174190- SKU:
- DS174190
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- APPLICATION:
- PUSHROD COVER
$7.95 -
JAMES GASKET Rocker Cover Gasket - .030" 17540-69-A
JAMES GASKET
$18.40A failing rocker cover gasket creates oil seepage that compromises engine cleanliness and can lead to costly secondary damage. This JAMES GASKET solution delivers a dependable seal using proven materials and manufacturing precision, eliminating the...DS174182- SKU:
- DS174182
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 0.79 MM
- TYPE:
- ROCKER COVER
- THICKNESS IMPERIAL:
- 0,031'
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,79 MM (0,031')
- UNITS:
- 10 PACK
$18.40 -
JAMES GASKET Rocker Cover Gasket 17540-69
JAMES GASKET
$16.50A compromised rocker cover gasket leads to oil seepage, contamination, and potential engine damage—issues that compound quickly under racing conditions or heavy use. The JAMES GASKET 17540-69 delivers a reliable, long-lasting seal using proven elastomer...DS174180- SKU:
- DS174180
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- THICKNESS:
- 0,51 MM (0,020')
- TYPE:
- ROCKER COVER
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$16.50 -
JAMES GASKET Bearing Housing Gasket - Silicon - 5 Speed 35652-79-X
JAMES GASKET
$20.70A properly sealed bearing housing is critical to maintaining transmission integrity and preventing fluid loss that compromises gear lubrication. The JAMES GASKET Bearing Housing Gasket delivers reliable sealing performance with silicon material that...DS174133- SKU:
- DS174133
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- BEARING HOUSING
- UNITS:
- 5 PACK
- FEATURES:
- BEADED
- PRODUCT NAME:
- GASKET
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$20.70 -
JAMES GASKET Bearing Housing Gasket - 5 Speed 35652-79-A
JAMES GASKET
$21.10A worn or compromised bearing housing gasket is a common culprit behind transmission fluid leaks and premature bearing wear in 5-speed transmissions. This JAMES GASKET replacement delivers OEM-equivalent sealing performance without the dealership markup,...DS174131- SKU:
- DS174131
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- TYPE:
- BEARING HOUSING
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
$21.10 -
JAMES GASKET Primary Cover Gasket 34952-52
JAMES GASKET
$41.40A failing primary cover gasket compromises engine sealing and invites oil leakage that can damage your engine bay and void warranty claims. The JAMES GASKET Primary Cover Gasket delivers OEM-spec performance with silicone beading for superior compression...DS174130- SKU:
- DS174130
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
$41.40 -
JAMES GASKET Cylinder Base Gasket - XL 16774-57
JAMES GASKET
$12.80A properly sealed cylinder base is critical to maintaining compression and preventing oil leakage in high-performance engines. The JAMES GASKET Cylinder Base Gasket delivers reliable sealing without the need for additional gasket sealers, giving you a...DS174120- SKU:
- DS174120
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- CYLINDER BASE
- UNITS:
- 10 PACK
- DISPLACEMENT:
- 900 CC
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
$12.80 -
JAMES GASKET Steel Base Gasket - XL 16774-96
JAMES GASKET
$44.95A quality base gasket is critical to maintaining a leak-free seal on your engine's crankcase, and the JAMES GASKET Steel Base Gasket delivers the reliability you need without the mess of additional sealers. Machined from durable steel and engineered to...DS174117- SKU:
- DS174117
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- STANDARD
- FEATURES:
- BEADED
- TYPE:
- CYLINDER BASE
$44.95 -
JAMES GASKET Metal Base Gasket with Silicone - Big Twin 16777-94
JAMES GASKET
$44.95A properly sealed engine base is non-negotiable for reliability and performance. The JAMES GASKET Metal Base Gasket eliminates the guesswork with a pre-formed design that seals right out of the box—no gasket sealer required. Built tough in the USA, this...DS174116- SKU:
- DS174116
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,017'
- THICKNESS METRIC:
- 0.43 MM
- UNITS:
- SET
- MATERIAL:
- RUBBER
- FEATURES:
- BEADED
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
$44.95 -
JAMES GASKET Cylinder Base Gasket - XL 16774-72
JAMES GASKET
$11.40A reliable cylinder base gasket is critical to maintaining proper compression and preventing oil seepage in your engine. The JAMES GASKET XL 16774-72 eliminates the need for additional gasket sealer, giving you a hassle-free installation that holds up...DS174110- SKU:
- DS174110
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- DISPLACEMENT:
- 1000 CC
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$11.40 -
JAMES GASKET Cylinder Head Gasket - XL 16769-72-A
JAMES GASKET
$43.20A cylinder head gasket is your engine's first line of defense against combustion pressure, coolant leaks, and oil seepage. The JAMES GASKET XL 16769-72-A delivers OEM-equivalent sealing performance with the reliability demanded by serious racers and...DS174080- SKU:
- DS174080
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- COPPER
- UNITS:
- 10 PACK
- DISPLACEMENT:
- 1000 CC
- THICKNESS:
- 0,41 MM (0,016')
- THICKNESS METRIC:
- 0.41 MM
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.016'
$43.20 -
JAMES GASKET Cam Cover Gasket - XL 25263-81
JAMES GASKET
$32.30Cam cover gasket failures lead to oil seepage, potential engine contamination, and costly downtime. The JAMES GASKET XL 25263-81 delivers OEM-grade sealing performance with precision engineering that prevents leaks before they start. Whether you're...DS174075- SKU:
- DS174075
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- PAPER
- THICKNESS METRIC:
- 0.79 MM
- TYPE:
- CAM COVER
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
$32.30 -
JAMES GASKET Starter Primary Gasket - XLCH 31461-70
JAMES GASKET
$21.20A proper seal on your primary cover is non-negotiable for engine reliability and performance. The JAMES GASKET Starter Primary Gasket prevents oil weeping that can compromise your ignition system and create messy drips on your garage floor. This...DS174072- SKU:
- DS174072
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- CORK
- TYPE:
- STARTER HOUSING
- UNITS:
- 10 PACK
- MOUNTING POSITION:
- STARTER HOUSING TO PRIMARY MOUNT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
$21.20 -
JAMES GASKET Starter Housing Gasket - XL 31488-77
JAMES GASKET
$9.30A leaking starter housing gasket will drain your engine's oil and compromise starter reliability—two problems that compound quickly on the track or in the shop. The JAMES GASKET XL 31488-77 delivers a precision seal with factory-grade durability, keeping...DS174071- SKU:
- DS174071
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- STARTER BODY TO HOUSING MOUNT
- PRODUCT NAME:
- GASKET
- TYPE:
- STARTER HOUSING
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
$9.30 -
JAMES GASKET Rocker Cover Gasket - XL 17536-70
JAMES GASKET
$15.40A rocker cover gasket is your first line of defense against oil leaks that compromise engine cleanliness and performance. This JAMES GASKET component uses a proven solid steel core with dual-sided elastomer coating to maintain a consistent, reliable seal...DS174060- SKU:
- DS174060
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- DISPLACEMENT:
- 1000 CC
- PRODUCT NAME:
- GASKET
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- 10 PACK
$15.40 -
JAMES GASKET Timing Cover Gasket - XL 25224-52-A
JAMES GASKET
$29.10A leaking timing cover gasket can compromise engine sealing and lead to oil weeping that accelerates wear on surrounding components. The JAMES GASKET Timing Cover Gasket delivers OEM-level sealing performance with precision engineering that eliminates...DS174050- SKU:
- DS174050
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- PAPER
- THICKNESS METRIC:
- 0.79 MM
- TYPE:
- CAM COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- 10 PACK
$29.10 -
JAMES GASKET Generator Gasket 30143-58
JAMES GASKET
$6.00A reliable gasket is the foundation of a sealed engine system—without it, you're risking fluid leaks and performance loss. The JAMES GASKET Generator Gasket 30143-58 uses advanced MicroPore paper technology to deliver superior sealability and fluid...DS174040- SKU:
- DS174040
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- PAPER
- MOUNTING POSITION:
- GENERATOR TO CASE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- TYPE:
- GENERATOR MOUNT
$6.00
