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 Complete Motor Gasket Kit - XL 17026-71
JAMES GASKET
$125.95A complete engine rebuild demands precision gaskets and seals that won't fail under pressure—whether you're chasing lap times or restoring a classic. The JAMES GASKET Complete Motor Gasket Kit delivers OEM-quality components across the entire engine,...DS173352- SKU:
- DS173352
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- COMPLETE
- UNITS:
- KIT
$125.95 -
JAMES GASKET Primary Gasket Kit 60538-85-K
JAMES GASKET
$75.95A quality primary gasket kit is the foundation of a reliable engine seal—neglecting it invites oil seepage, pressure loss, and potential internal contamination. The JAMES GASKET Primary Gasket Kit 60538-85-K delivers OEM-equivalent performance with...DS173351- SKU:
- DS173351
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
$75.95 -
JAMES GASKET Trans Top Cover Gasket - Big Twin 34904-79
JAMES GASKET
$18.80Transmission fluid leaks compromise both performance and engine longevity, and the factory gasket often fails prematurely on high-mileage Big Twin engines. The JAMES GASKET Trans Top Cover Gasket provides a precision seal that eliminates weeping and...DS173349- SKU:
- DS173349
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- TRANSMISSION TOP COVER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$18.80 -
JAMES GASKET Trans Cover Gasket - Big Twin 34904-86
JAMES GASKET
$18.80A failing transmission cover gasket compromises seal integrity, leading to fluid leakage, contamination, and costly transmission damage. The JAMES GASKET Trans Cover Gasket delivers OEM-quality sealing reliability, engineered to handle the demands of Big...DS173343- SKU:
- DS173343
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION TOP COVER
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
$18.80 -
JAMES GASKET Top End Gasket Kit - Big Twin/EVO 17033-83
JAMES GASKET
$96.95A complete top-end gasket kit is essential for any Big Twin or EVO engine rebuild—compromising here with inferior gaskets invites oil leaks, compression loss, and premature failure. JAMES GASKET delivers OEM-quality sealing surfaces across all critical...DS173342- SKU:
- DS173342
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.500'
- TYPE:
- TOP END
- UNITS:
- KIT
$96.95 -
JAMES GASKET Top End Gasket Kit - XL 17030-57
JAMES GASKET
$40.95A complete engine rebuild demands precision gaskets and seals that won't compromise your work or engine longevity. The JAMES GASKET Top End Gasket Kit delivers OEM-quality components engineered to maintain proper compression, prevent oil leakage, and...DS173335- SKU:
- DS173335
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$40.95 -
JAMES GASKET Complete Gasket Kit - Panhead 17028-48
JAMES GASKET
$90.95A complete engine rebuild demands precision sealing at every junction—and this James Gasket kit eliminates the guesswork by providing every gasket, oil seal, and O-ring your Panhead needs in one package. Rather than sourcing components piecemeal and...DS173326- SKU:
- DS173326
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- UNITS:
- KIT
$90.95 -
JAMES GASKET Complete Motor Gasket Kit - Shovelhead 17029-70-A
JAMES GASKET
$152.95A complete engine rebuild demands gaskets and seals that won't compromise your work or your engine's longevity. The JAMES GASKET Complete Motor Gasket Kit delivers every OEM-specification gasket, oil seal, and O-ring you need for a Shovelhead...DS173323- SKU:
- DS173323
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- RIDING STYLE:
- STREET
$152.95 -
JAMES GASKET Rocker Box Rubber Gasket - Big Twin 17033-83-R
JAMES GASKET
$75.95A leaking rocker box gasket compromises engine sealing, increases oil consumption, and creates a mess in your engine bay. The JAMES GASKET Rocker Box Rubber Gasket is engineered to deliver a reliable, long-lasting seal on Big Twin applications,...DS173321- SKU:
- DS173321
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$75.95 -
JAMES GASKET Cam Change Gasket Kit - Big Twin 25225-70-K
JAMES GASKET
$32.95A cam change requires precision sealing—using OEM-quality gaskets, seals, and O-rings ensures zero oil leakage and protects your engine's internal components during this critical service. The JAMES GASKET Cam Change Gasket Kit eliminates the frustration...DS173319- SKU:
- DS173319
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- UNITS:
- KIT
- TYPE:
- CAM CHANGE
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$32.95 -
JAMES GASKET Cam Change Gasket Kit - Big Twin 25225-93-K
JAMES GASKET
$33.95A cam change is one of the most critical maintenance procedures on a Big Twin engine, and using OEM-spec gaskets and seals is non-negotiable for preventing oil leaks and ensuring proper engine compression. The JAMES GASKET Cam Change Gasket Kit includes...DS173318- SKU:
- DS173318
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CAM CHANGE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$33.95 -
JAMES GASKET Rocker Box Rubber Gasket - Big Twin 17042-92
JAMES GASKET
$67.95A leaking rocker box gasket will compromise engine sealing and lead to oil seepage that damages your engine's appearance and threatens internal components. The JAMES GASKET Rocker Box Rubber Gasket delivers OEM-grade sealing reliability with the...DS173316- SKU:
- DS173316
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- ROCKER BOX
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$67.95 -
JAMES GASKET Rocker Box Rubber Gasket - Big Twin 17038-90
JAMES GASKET
$49.95A properly sealed rocker box is fundamental to engine longevity—this JAMES GASKET component prevents oil seepage that compromises performance and creates maintenance headaches. Designed specifically for Big Twin applications, it delivers OEM-equivalent...DS173315- SKU:
- DS173315
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
$49.95 -
JAMES GASKET Big Bore Top End Gasket Kit - 80" 17033-92
JAMES GASKET
$128.95A complete top-end gasket kit is essential for any engine rebuild—sealing integrity directly impacts compression, oil retention, and overall reliability. The JAMES GASKET Big Bore kit supplies all necessary gaskets, oil seals, and O-rings in a single...DS173275- SKU:
- DS173275
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,045'
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.625'
- THICKNESS METRIC:
- 1.14 MM
- TYPE:
- TOP END
- UNITS:
- KIT
$128.95 -
JAMES GASKET Top End Gasket Kit - Big Twin 17033-83-A
JAMES GASKET
$96.95A top-end engine rebuild demands precision-matched gaskets and seals that prevent oil weeping, combustion leakage, and premature wear. The JAMES GASKET Top End Gasket Kit supplies OEM-grade components engineered to factory specifications, eliminating the...DS173251- SKU:
- DS173251
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,045'
- THICKNESS METRIC:
- 1.14 MM
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$96.95 -
JAMES GASKET Top End Gasket Kit - 80" 17040-92
JAMES GASKET
$121.95A complete top-end gasket kit is essential for any engine rebuild—it ensures proper sealing across critical surfaces and prevents oil leakage, coolant weeping, and compression loss that compromise performance and reliability. JAMES GASKET's 80" kit...DS173250- SKU:
- DS173250
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- THICKNESS IMPERIAL:
- 0,045'
- THICKNESS METRIC:
- 1.14 MM
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
$121.95 -
JAMES GASKET Breather Cover Filter - Twin Cam 63815-99
JAMES GASKET
$15.50Rocker box breathers are critical to engine longevity—they allow pressure and moisture to escape while preventing contaminants from entering your crankcase. A quality breather filter like the JAMES GASKET unit protects internal engine components from...DS173248- SKU:
- DS173248
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- FIBER
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- FILTER
- TYPE:
- BREATHER
$15.50 -
JAMES GASKET Pushrod Tube Seal - Twin Cam 11293-TC
JAMES GASKET
$19.95Pushrod tube seals are critical wear items that directly impact cam cover integrity and oil containment on Twin Cam engines. A failed seal compromises both performance and engine longevity, making a complete, quality replacement kit essential during any...DS173247- SKU:
- DS173247
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- PUSHROD TUBE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL KIT
$19.95 -
JAMES GASKET Motor Gasket Kit with Metal - Big Twin 17035-83-B
JAMES GASKET
$132.95A Panhead engine rebuild demands precision sealing—and that's exactly what this JAMES GASKET kit delivers. This complete gasket, oil seal, and O-ring set eliminates the frustration of sourcing individual components and ensures your rebuild meets factory...DS173245- SKU:
- DS173245
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- RIDING STYLE:
- STREET
$132.95 -
JAMES GASKET Top End Gasket Kit - XL 17032-86-B
JAMES GASKET
$113.95A complete top-end gasket kit is essential for any engine rebuild—it ensures proper sealing across all critical surfaces and prevents oil leaks, coolant seepage, and combustion blow-by that compromise performance and reliability. JAMES GASKET's XL...DS173244- SKU:
- DS173244
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$113.95
