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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COMETIC Engine Gasket Kit - Iron XL C9049F
COMETIC
$162.01A complete gasket kit is the foundation of a reliable engine build—skimping on gaskets is a common path to catastrophic failure. The COMETIC Iron XL C9049F delivers OEM-quality sealing across all critical engine surfaces, using purpose-engineered...09344799- SKU:
- 09344799
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- BORE SIZE:
- 3,1875'
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.1875'
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
$162.01Qty in Cart: 0Quantity:Price:$162.01Subtotal: -
FEULING OIL PUMP CORP. Sandwich Adapter Kit 2023
FEULING OIL PUMP CORP.
$27.25Remote oil cooling systems demand reliable mounting infrastructure, and the Feuling Oil Pump Corp. Sandwich Adapter Kit delivers exactly that. By integrating directly into your engine's oil gallery, this sandwich adapter eliminates the guesswork of...09344746- SKU:
- 09344746
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- OIL FILTER
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$27.25 -
COMETIC Case Saver Gasket C10125
COMETIC
$55.07If you're rebuilding a primary case or running high-heat conditions, gasket failure isn't an option—it costs you race time and credibility. The COMETIC Case Saver Gasket C10125 delivers the reliability you need with Cometic's proven AFM (Aluminum...09344745- SKU:
- 09344745
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MOUNTING POSITION:
- INNER
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS METRIC:
- 0.81 MM
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,032'
- TYPE:
- PRIMARY
$55.07 -
COMETIC Complete Gasket Kit - Big Twin C10123-030
COMETIC
$302.03A complete gasket kit is the foundation of a reliable engine—one failed seal can compromise performance and lead to costly downtime. The Cometic C10123-030 combines purpose-built materials for each application, ensuring consistent compression and...09344744- SKU:
- 09344744
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.76 MM
- BORE SIZE:
- 3,937'
- BORE SIZE IMPERIAL:
- 3.937'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
$302.03 -
COMETIC Cam Cover Gasket - XL C9332F-1
COMETIC
$16.48A leaking cam cover gasket compromises engine sealing and can lead to oil seepage that fouls spark plugs and degrades ignition performance. The COMETIC Cam Cover Gasket XL C9332F-1 delivers reliable, long-lasting sealing with materials engineered to...09344682- SKU:
- 09344682
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- CAM COVER
- UNITS:
- EACH
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS METRIC:
- 1.52 MM
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.060'
$16.48 -
COMETIC Magneto Cover Gasket C9327-5
COMETIC
$5.20A leaking magneto cover gasket compromises engine sealing and can lead to oil weeping, contamination, and potential ignition system issues. The COMETIC Magneto Cover Gasket C9327-5 delivers reliable, long-lasting sealing with precision engineering that...09344681- SKU:
- 09344681
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- MAG COVER
- UNITS:
- 5 PACK
- MATERIAL:
- FIBER
- TYPE:
- IGNITION COVER
$5.20 -
COMETIC Starter Housing Gasket C9324
COMETIC
$22.10A leaking starter housing gasket compromises engine reliability and can lead to costly oil seepage and starter failure. The COMETIC C9324 is engineered to maintain a perfect seal under demanding racing and high-performance conditions, eliminating the...09344679- SKU:
- 09344679
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 0.79 MM
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,79 MM (0,031')
- MATERIAL:
- FIBER
- TYPE:
- STARTER HOUSING
$22.10 -
COMETIC Generator Mount Gasket C9321
COMETIC
$4.36A failing generator mount gasket compromises engine sealing and can lead to coolant leaks, oil seepage, and potential overheating—especially under sustained racing conditions. The COMETIC C9321 provides OEM-grade sealing reliability with precision...09344675- SKU:
- 09344675
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- FIBER
- THICKNESS IMPERIAL:
- 0,020'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,51 MM (0,020')
- TYPE:
- GENERATOR
- THICKNESS METRIC:
- 0.51 MM
- UNITS:
- 5 PACK
$4.36 -
COMETIC Primary Gasket C9318F5
COMETIC
$93.10A primary gasket failure can compromise your entire engine seal system and leave you sidelined. The COMETIC C9318F5 eliminates the guesswork with AFM technology engineered specifically for high-heat, high-performance applications—delivering reliable...09344673- SKU:
- 09344673
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- PRIMARY
- UNITS:
- 5 PACK
$93.10 -
COMETIC Primary Gasket C9318F1
COMETIC
$33.02If you're rebuilding a primary or running aggressive ignition timing, gasket failure isn't an option—it'll cost you a race day and thousands in engine damage. The COMETIC C9318F1 uses proprietary AFM material that handles extreme heat cycles without...09344672- SKU:
- 09344672
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- PRIMARY COVER
- UNITS:
- EACH
- THICKNESS IMPERIAL:
- 0.060'
$33.02Qty in Cart: 0Quantity:Price:$33.02Subtotal: -
COMETIC Primary Gasket C9317F5
COMETIC
$74.30A properly sealed primary gasket is non-negotiable for maintaining oil pressure, preventing leaks, and ensuring reliable engine performance—especially in high-temperature racing applications. The COMETIC C9317F5 uses proprietary AFM material engineered...09344671- SKU:
- 09344671
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- 5 PACK
- MOUNTING POSITION:
- OUTER
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS METRIC:
- 1.52 MM
- TYPE:
- PRIMARY
$74.30 -
COMETIC Primary Gasket C9317F1
COMETIC
$26.41A primary gasket failure doesn't just leak oil—it compromises engine sealing integrity and forces you off the track or out of the garage. The COMETIC C9317F1 uses AFM (Aluminum Foamette Material) technology to deliver exceptional thermal stability and...09344670- SKU:
- 09344670
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- PRIMARY
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- THICKNESS METRIC:
- 1.52 MM
- UNITS:
- EACH
- THICKNESS:
- 1,52 MM (0,060')
$26.41 -
JAMES GASKET Transmission Pan Gasket - FXD 26072-90-F
JAMES GASKET
$31.45A failing transmission pan gasket compromises your entire drivetrain by allowing fluid to escape, leading to low fluid levels, overheating, and potential transmission damage. This JAMES GASKET replacement restores the seal with OEM-level precision,...09344638- SKU:
- 09344638
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL PAN
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- MATERIAL:
- FOAMET
$31.45 -
JAMES GASKET Primary Cover Gasket 34955-67-F5
JAMES GASKET
$156.00A leaking primary cover gasket compromises engine reliability and creates a messy workspace. The JAMES GASKET Primary Cover Gasket delivers OEM-equivalent sealing performance with reinforced silicone beading designed to handle thermal cycling and...09342114- SKU:
- 09342114
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- FEATURES:
- BEADED
- MATERIAL:
- FOAMET
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- STYLE:
- PRIMARY
- UNITS:
- 5 PACK
- TYPE:
- COVER
$156.00Qty in Cart: 0Quantity:Price:$156.00Subtotal: -
JAMES GASKET Primary Cover Gasket 34955-67-F
JAMES GASKET
$48.25A failing primary cover gasket compromises engine sealing and invites oil seepage that can damage your cases and create a mess in the engine bay. The JAMES GASKET Primary Cover Gasket delivers OEM-specification performance with silicone beading for...09342113- SKU:
- 09342113
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- FEATURES:
- BEADED
- UNITS:
- EACH
- TYPE:
- COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- FOAMET
- STYLE:
- PRIMARY
$48.25 -
JAMES GASKET Tappet Cover Gasket - Twin Cam 18635-99-F
JAMES GASKET
$15.70Proper gasket sealing on your Twin Cam is non-negotiable for engine reliability and oil containment. This James complete kit eliminates guesswork by bundling all necessary seals and O-rings for a tappet cover service or cam change in one convenient...09342108- SKU:
- 09342108
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- FOAMET
- MOUNTING POSITION:
- FRONT
- MOUNTING POSITION:
- REAR
- UNITS:
- SET
- TYPE:
- TAPPET COVER
- FEATURES:
- BEADED
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
$15.70 -
JAMES GASKET Rocker Cover Gasket - XL 17695-07
JAMES GASKET
$17.26A leaking rocker cover gasket compromises engine cleanliness and can mask deeper issues. The JAMES GASKET XL 17695-07 delivers a reliable, long-lasting seal using premium materials and precision engineering—keeping oil where it belongs and giving you...09342099- SKU:
- 09342099
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MOUNTING POSITION:
- INNER
$17.26 -
JAMES GASKET Outer Rocker Cover Gasket - XL 17362-07
JAMES GASKET
$37.20A compromised rocker cover gasket leads to oil seepage, engine bay mess, and potential contamination of critical engine components. The JAMES GASKET Outer Rocker Cover Gasket XL 17362-07 delivers a reliable, long-lasting seal using a dual-elastomer...09342098- SKU:
- 09342098
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- MOUNTING POSITION:
- OUTER
- TYPE:
- ROCKER BOX
$37.20 -
JAMES GASKET Rocker Cover Gasket - XL 17030-07-X
JAMES GASKET
$96.55A leaking rocker cover gasket compromises engine sealing and can lead to oil contamination of spark plugs and cylinder head components. The JAMES GASKET Rocker Cover Gasket XL 17030-07-X delivers reliable sealing performance with precision engineering...09342097- SKU:
- 09342097
- Availability:
- Ships Same Business Day
- Weight:
- 0.33 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- GASKET KIT
$96.55 -
JAMES GASKET Motor Gasket Kit - XL 17047-07-X
JAMES GASKET
$229.90A complete engine rebuild demands gaskets and seals that won't fail under pressure. The JAMES GASKET Motor Gasket Kit delivers OEM-grade components engineered to maintain compression, prevent oil migration, and ensure long-term reliability—whether you're...09342096- SKU:
- 09342096
- Availability:
- Ships Same Business Day
- Weight:
- 1.46 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$229.90
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.
