Harley Engine Gaskets and Kits
Harley Bike Gaskets & Kits at JJ Motorsports
Rebuild your Harley with premium gasket kits and seals from JJ Motorsports, featuring complete top-end, motor, and cam-install kits for leak-free performance on Milwaukee-Eight, Twin Cam, Evo, and Big Twin engines. These high-quality MLS, rubber, and metal gaskets ensure perfect sealing and long-term reliability.
Shop Feuling, Cometic, and James Gasket for proven sealing solutions. Explore related categories such as Harley engine for cams and lifters, or Harley for oil pumps and heads to complete your rebuild.
Top Harley Gaskets & Kits
- Feuling Top-End Cam Install Kit M8 2030 – Complete top-end gasket kit for Milwaukee-Eight; includes head, base, rocker, and pushrod seals.
- Cometic Complete Gasket Kit C9748F – Full engine gasket set with MLS head gaskets; fits Twin Cam 88/96/103 engines.
- James Gasket Motor Gasket Metal Base Rocker 17041-92-A – Metal rocker box base gasket set; OEM-style for Evo and Twin Cam rocker boxes.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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JAMES GASKET Mylar Gasket/Seal Kit 81-FL
JAMES GASKET
$16.95A properly functioning oil pump is critical to engine reliability and longevity—inadequate oil circulation leads to catastrophic bearing wear and engine failure. The JAMES GASKET Mylar Gasket/Seal Kit restores your pump to OEM performance with...DS173374- SKU:
- DS173374
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- OIL PUMP
- RIDING STYLE:
- STREET
$16.95 -
JAMES GASKET Paper Gasket/Seal Kit 79-FLH
JAMES GASKET
$16.95A failing oil pump gasket and seal kit compromises engine lubrication and invites costly leaks that can damage your entire drivetrain. The JAMES GASKET Paper Gasket/Seal Kit gives you OEM-quality replacement components to fully rebuild or rebush your oil...DS173373- SKU:
- DS173373
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- OIL PUMP
- UNITS:
- KIT
$16.95 -
JAMES GASKET Trans Gasket/Seal Kit - FL 33031-93
JAMES GASKET
$52.95Transmission fluid leaks compromise performance and reliability, leading to costly damage and downtime. The JAMES GASKET Trans Gasket/Seal Kit provides OEM-quality sealing for Harley-Davidson FL models, eliminating weeping seals and restoring peace of...DS173372- SKU:
- DS173372
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- STYLE:
- 5-SPEED
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
$52.95 -
JAMES GASKET Trans Gasket SEL Kit - Dyna 33031-91
JAMES GASKET
$51.95Transmission gasket failures are among the most common causes of fluid leaks on Dyna models, leading to contamination and costly repairs if left unchecked. The JAMES GASKET Trans Gasket SEL Kit delivers OEM-quality sealing with precision-cut gaskets...DS173371- SKU:
- DS173371
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- 5-SPEED
- UNITS:
- KIT
$51.95 -
JAMES GASKET Trans Gasket Set - W/WL 33030-41
JAMES GASKET
$35.95A transmission gasket set is critical to preventing fluid leaks that compromise shift quality and lead to costly internal damage. The JAMES GASKET Trans Gasket Set is engineered to maintain a perfect seal across all transmission pan interfaces, ensuring...DS173370- SKU:
- DS173370
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
$35.95 -
JAMES GASKET Top End Gasket Kit - Flathead 17031-40
JAMES GASKET
$60.95A complete top-end gasket failure can leave your flathead sidelined for weeks while you source replacement parts individually. The JAMES GASKET Top End Gasket Kit consolidates every seal, gasket, and O-ring you need for a proper engine rebuild in one...DS173367- SKU:
- DS173367
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$60.95 -
JAMES GASKET Motor Gasket Set - K Model 17026-52
JAMES GASKET
$72.95A complete engine rebuild demands precision-engineered gaskets and seals that won't fail under pressure—JAMES Gasket delivers exactly that. This comprehensive motor gasket set includes all the critical sealing components you need to restore engine...DS173357- SKU:
- DS173357
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- TYPE:
- COMPLETE
$72.95Qty in Cart: 0Quantity:Price:$72.95Subtotal: -
JAMES GASKET Motor Gasket Set - 45" - Flathead 17026-40
JAMES GASKET
$83.95A complete engine rebuild demands precision-fitted gaskets and seals that won't compromise your work. The JAMES GASKET Motor Gasket Set supplies all the critical sealing components needed for a full Panhead teardown and reassembly, eliminating the...DS173356- SKU:
- DS173356
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$83.95 -
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
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Engine Gaskets and Kits
- Compatibility: Ensure the kit fits your Harley's engine type (e.g., Milwaukee-Eight M8, Twin Cam 88/96/103, Evo, Big Twin) and model (e.g., FLHR Road King 1984-1998, FLST Heritage Softail 2006). Use the vehicle selector for year-specific matches, including bore sizes and applications to avoid sealing issues.
- Type of Use: For cam changes or top-end rebuilds, select install kits with ARP bolts; complete gasket sets suit full engine overhauls for leak-free performance in touring or street riding.
- Components and Upgrades: Choose kits with MLS head gaskets, Viton seals, AFM exhaust gaskets, ARP hardware, and O-rings. Focus on high-tech materials for heat dissipation, corrosion resistance, and reliable sealing.
- Brand and Quality: Opt for Feuling for cam install kits with Koyo bearings, Cometic for EST gasket sets with embossed steel, James Gasket for rocker/base gaskets, Vance & Hines for exhaust ports, or Drag Specialties for transmission boards. Prioritize USA-made quality for durability in extreme conditions.
- Installation and Cost: Kits are designed for DIY or professional rebuilds with included components like moly paste and Loctite. Prices range from $16.95 for exhaust gaskets to $356.95 for complete sets—factor in bore sizes and free shipping over $99 for value.
Frequently Asked Questions (FAQs)
- What Harley models and engines do these gaskets and kits support? Kits support Big Twin, Twin Cam, Evo, M8, and models like Road King, Heritage Softail—use the year/make/model filter for compatibility, including bore sizes like 3.500" to 3.8125".
- How do high-tech materials improve sealing? Materials like MLS steel, Viton-coated, and AFM provide even heat dissipation, corrosion resistance, and leak-free performance for rebuilds.
- What is typically included in a cam install kit? Feuling kits include seals, bearings, ARP bolts, moly paste, Loctite, washers, and copper gaskets for complete cam changes.
- Are these kits suitable for top-end rebuilds? Yes, Cometic and James Gasket kits focus on top-end with head/base/rocker gaskets for reliable overhauls.
- What if a kit doesn't fit my Harley? Verify engine type, bore size, and model before buying. Our returns policy allows exchanges or refunds if it doesn't match.
- Can I find related engine parts? Yes—explore pistons/rings, cylinders/heads, bearings/seals, or full rebuild kits in the Harley engine category to complete your gasket upgrade.
