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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VANCE & HINES Exhaust Port Gaskets - Big Twin/XL 22899
VANCE & HINES
$16.95Exhaust port gaskets are a wear item that directly impacts your engine's combustion seal and overall performance reliability. A degraded or leaking gasket forces your engine to work harder, losing power and inviting exhaust leaks that compromise tuning...09341882- SKU:
- 09341882
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- TYPE:
- EXHAUST
$16.95 -
JAMES GASKET Foam Primary Cover Gasket 34955-04-F
JAMES GASKET
$36.95A leaking primary cover gasket compromises engine sealing and invites oil contamination into critical drivetrain components. The JAMES GASKET Foam Primary Cover Gasket delivers OEM-equivalent performance with enhanced durability, ensuring a reliable seal...09350249- SKU:
- 09350249
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- FOAMET
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- TYPE:
- PRIMARY COVER
$36.95 -
JAMES GASKET Transmission Oil Pan 26077-93
JAMES GASKET
$33.90A quality transmission oil pan is critical to maintaining proper fluid temperature and preventing leaks that can compromise your drivetrain's performance. The JAMES GASKET 26077-93 is precision-engineered to OEM specifications, ensuring a secure seal and...09343431- SKU:
- 09343431
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TRANSMISSION
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- TYPE:
- OIL PAN
$33.90 -
FEULING OIL PUMP CORP. Top End Cam Install Kit - M8 2030
FEULING OIL PUMP CORP.
$119.95A proper top-end rebuild demands precision fasteners, quality bearings, and OEM gasket materials—all sourced and tested together. This Feuling kit eliminates guesswork by bundling everything needed for M8 cam installation, saving you time on sourcing and...09345984- SKU:
- 09345984
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CAM CHANGE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$119.95 -
JAMES GASKET Clutch Derby Cover Gasket 25416-14
JAMES GASKET
$49.40A quality clutch derby cover gasket is essential for preventing oil leaks and maintaining proper engine sealing on your motorcycle. The JAMES GASKET Clutch Derby Cover Gasket 25416-14 delivers reliable performance with precision engineering, ensuring a...09345379- SKU:
- 09345379
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- DERBY COVER
$49.40 -
JAMES GASKET Cylinder Head Gasket - M8 JGI-16500326
JAMES GASKET
$34.00A cylinder head gasket is the critical seal between your engine block and cylinder head—any compromise here means oil leaks, coolant seepage, and catastrophic compression loss. The JAMES GASKET M8 is engineered for Harley-Davidson M8 engines, delivering...09345963- SKU:
- 09345963
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER HEAD
- UNITS:
- 5 PACK
$34.00 -
JAMES GASKET Cylinder Base Gasket - M8 JGI-16500332
JAMES GASKET
$35.95A failing cylinder base gasket compromises compression, invites oil seepage, and creates inconsistent combustion—all of which tank your engine's reliability and performance. The JAMES GASKET Cylinder Base Gasket for M8 applications delivers OEM-quality...09345964- SKU:
- 09345964
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
$35.95 -
JAMES GASKET Lifter Cover Gasket - M8 JGI-25700362
JAMES GASKET
$12.95A worn or failing lifter cover gasket compromises engine sealing, leading to oil leaks that accelerate wear on critical components and create unwanted mess in your engine bay. JAMES GASKET's M8 lifter cover gasket delivers OEM-equivalent sealing...09345965- SKU:
- 09345965
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- TAPPET BLOCK
- UNITS:
- PAIR
$12.95 -
JAMES GASKET Piston Squirter Gasket - M8 JGI-25700433
JAMES GASKET
$17.10Piston squirters are critical to engine longevity, delivering precisely controlled oil spray to the underside of pistons for superior cooling and reduced friction during high-RPM operation. A failing or worn gasket compromises this crucial lubrication...09345967- SKU:
- 09345967
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- 10 PACK
- TYPE:
- OIL JET ASSEMBLY
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
$17.10 -
JAMES GASKET Cam Cover Gasket - M8 JGI-25700370
JAMES GASKET
$39.70A leaking cam cover gasket compromises engine sealing and invites oil contamination into your combustion chamber—a guaranteed path to performance loss and engine wear. The JAMES GASKET Cam Cover Gasket for M8 engines delivers OEM-grade sealing...09345968- SKU:
- 09345968
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- TYPE:
- CAM COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
$39.70 -
JAMES GASKET Air Cleaner Gasket - M8 JGI-29000149
JAMES GASKET
$8.00A worn or damaged air cleaner gasket compromises your engine's intake seal, allowing unfiltered air to bypass your filtration system and potentially introducing contaminants into the combustion chamber. This JAMES GASKET replacement restores a proper...09345969- SKU:
- 09345969
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- AIR FILTER
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
$8.00 -
DRAG SPECIALTIES Gasket Board - 6 Speed 0934-6982
DRAG SPECIALTIES
$129.73A properly sealed transmission is non-negotiable for reliable power delivery and longevity in any high-performance application. The DRAG SPECIALTIES Gasket Board for 6-speed transmissions provides OEM-equivalent sealing surfaces, preventing fluid leakage...09346982- SKU:
- 09346982
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET BOARD
- STYLE:
- 6 SPEED
$129.73 -
DRAG SPECIALTIES Gasket Board - 6 Speed 0934-6983
DRAG SPECIALTIES
$117.37A worn or degraded gasket board compromises transmission sealing, leading to fluid leaks, contamination, and potential drivetrain failure—especially critical in high-performance 6-speed applications where precision tolerances demand reliable sealing. The...09346983- SKU:
- 09346983
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
- PRODUCT NAME:
- GASKET BOARD
- RIDING STYLE:
- STREET
- STYLE:
- 6 SPEED
- UNITS:
- EACH
$117.37 -
DRAG SPECIALTIES Gasket Board - XL 0934-1878
DRAG SPECIALTIES
$160.63If you're running a professional shop or serious home garage, keeping XL Evolution gaskets, seals, and O-rings organized and accessible is non-negotiable. This display board eliminates the guesswork when sourcing rebuild components—everything you need is...09341878- SKU:
- 09341878
- Availability:
- Ships Same Business Day
- Weight:
- 7.05 LBS
- PRODUCT NAME:
- DISPLAY BOARD
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- GASKET
$160.63 -
DRAG SPECIALTIES Inner Rocker Box Gasket 302133-HC4
DRAG SPECIALTIES
$20.55A leaking rocker box gasket compromises oil containment and can lead to messy engine bays and potential oil starvation issues. This OEM-quality replacement gasket from Drag Specialties ensures a proper seal when servicing or rebuilding your rocker box...DS376510- SKU:
- DS376510
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
$20.55Qty in Cart: 0Quantity:Price:$20.55Subtotal: -
JAMES GASKET Oil Retain Gasket - XL 35169-52-F
JAMES GASKET
$7.80A compromised oil seal leads to messy leaks, lost lubrication, and potential engine damage—especially under the demanding conditions of track use or high-performance builds. The JAMES GASKET Oil Retain Gasket XL delivers a positive, long-lasting seal...09344643- SKU:
- 09344643
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- FOAMET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL SEAL RETAINER
$7.80 -
JAMES GASKET Oil Pump Gasket Kit HVHP
JAMES GASKET
$20.95A failing oil pump gasket compromises your engine's lubrication system, risking catastrophic bearing wear and complete engine failure. The JAMES GASKET Oil Pump Gasket Kit HVHP gives you everything needed to fully rebuild or rebush your oil pump,...09341552- SKU:
- 09341552
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- OIL PUMP
$20.95Qty in Cart: 0Quantity:Price:$20.95Subtotal: -
On Sale
COMETIC Complete Gasket Kit C9748F
COMETIC
MSRP: $356.95Now: $336.00Was: $356.95A complete gasket kit eliminates the guesswork when rebuilding or refreshing your engine—you get every seal you need in one package, engineered to hold pressure and prevent leaks across the entire motor. COMETIC's C9748F uses application-specific...09340815- SKU:
- 09340815
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
MSRP: $356.95Now: $336.00Was: $356.95 -
On Sale
COMETIC Top End Gasket - 3-13/16" C9969
COMETIC
MSRP: $135.40Now: $127.00Was: $135.40A compromised top end gasket kit leaves your engine vulnerable to combustion leakage, coolant seepage, and catastrophic thermal failure—especially under sustained boost or high RPM loads. The COMETIC C9969 EST gasket set eliminates these risks by...09340820- SKU:
- 09340820
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE:
- 3,8125'
- MATERIAL:
- FOAM
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- MATERIAL:
- VITON
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.8125'
- UNITS:
- KIT
MSRP: $135.40Now: $127.00Was: $135.40 -
On Sale
COMETIC Trans Gasket - Big Twin C9469
COMETIC
MSRP: $81.85Now: $77.00Was: $81.85Transmission gasket failures lead to fluid leaks, loss of hydraulic pressure, and catastrophic drivetrain damage—especially in high-performance Big Twin applications where tolerances are unforgiving. The COMETIC Trans Gasket C9469 eliminates guesswork by...09340824- SKU:
- 09340824
- Availability:
- Ships Same Business Day
- Weight:
- 1.22 LBS
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
MSRP: $81.85Now: $77.00Was: $81.85
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.
