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 Cam Cover Gasket - XL 25263-90
JAMES GASKET
$29.10A leaking cam cover gasket compromises engine sealing and invites oil contamination into critical upper-engine components. The JAMES GASKET XL 25263-90 delivers OEM-grade sealing performance with consistent compression retention, eliminating weeping and...DS174383- SKU:
- DS174383
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- THICKNESS IMPERIAL:
- 0,031'
- TYPE:
- CAM COVER
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- THICKNESS:
- 0,79 MM (0,031')
- PRODUCT NAME:
- GASKET
$29.10 -
JAMES GASKET Primary Cover Gasket - Silicon 60539-89-X
JAMES GASKET
$132.00A leaking primary cover gasket compromises engine sealing and invites contamination into your motor—exact fitment and material integrity are non-negotiable. The JAMES GASKET Primary Cover Gasket delivers OEM-equivalent performance with silicone beading...DS174382- SKU:
- DS174382
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY COVER
- THICKNESS IMPERIAL:
- 0.062'
$132.00 -
JAMES GASKET Primary Inspection Cover Gasket - Big Twin 60567-36
JAMES GASKET
$13.90Inspection cover leaks are a common culprit behind oil seepage and messy engine bays. The JAMES GASKET Primary Inspection Cover Gasket delivers a reliable, OEM-quality seal that stops weeping before it starts—keeping your engine compartment clean and...DS174380- SKU:
- DS174380
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- CORK
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- TYPE:
- INSPECTION COVER
$13.90 -
JAMES GASKET End Cover Gasket - 5 Speed 36801-87-A
JAMES GASKET
$14.30A worn or leaking end cover gasket compromises your transmission's integrity, leading to fluid loss and potential internal damage. The JAMES GASKET End Cover Gasket ensures a proper seal on your 5-speed transmission, maintaining consistent hydraulic...DS174372- SKU:
- DS174372
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH RELEASE
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
$14.30 -
JAMES GASKET Front Tappet Block Gasket - Big Twin 18634-48-A/B
JAMES GASKET
$8.60A proper seal between your tappet block and engine cases is non-negotiable for oil containment and reliable operation. James Gasket's OEM-equivalent front tappet block gasket eliminates guesswork during cam changes or top-end rebuilds by providing the...DS174370- SKU:
- DS174370
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- TAPPET BLOCK
- PRODUCT NAME:
- GASKET
- MOUNTING POSITION:
- FRONT
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
$8.60 -
JAMES GASKET Cam Cover Gasket - XL 25263-86
JAMES GASKET
$29.10A failing cam cover gasket can lead to oil seepage that compromises engine cleanliness and invites contamination into critical valve train components. This JAMES GASKET replacement restores a reliable seal, protecting your engine's top end from costly...DS174367- SKU:
- DS174367
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- DISPLACEMENT:
- 1200 CC
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS IMPERIAL:
- 0,031'
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- CAM COVER
- UNITS:
- 10 PACK
- DISPLACEMENT:
- 1100 CC
- DISPLACEMENT:
- 883 CC
$29.10 -
JAMES GASKET Foot Peg Stud Gasket - XL 34624-77
JAMES GASKET
$6.30A reliable gasket is the foundation of any leak-free assembly, and foot peg studs demand precision sealing in high-temperature, high-vibration environments. The JAMES GASKET XL 34624-77 combines advanced MicroPore gasket paper technology with superior...DS174365- SKU:
- DS174365
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- THICKNESS:
- 0,76 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- PRODUCT NAME:
- GASKET
- TYPE:
- SHIFTER STUD BOSS
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
$6.30 -
JAMES GASKET Rear Tappet Block Gasket - Big Twin 18633-48-A/C
JAMES GASKET
$8.60A leaking rear tappet block gasket can compromise your Big Twin's reliability and lead to costly oil seepage during critical rides or track sessions. This OEM-spec James Gasket delivers a factory-correct seal without guesswork, ensuring your cam change...DS174360- SKU:
- DS174360
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TAPPET BLOCK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- THICKNESS:
- 0,79 MM (0,031')
- MOUNTING POSITION:
- REAR
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- 10 PACK
$8.60 -
JAMES GASKET Lower Rocker Cover - XL 17353-86-A
JAMES GASKET
$44.90A quality rocker cover gasket is essential for preventing oil seepage that can compromise engine cleanliness and performance. The JAMES GASKET Lower Rocker Cover combines precision engineering with thoughtful design features—elastomer beading and...DS174359- SKU:
- DS174359
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- 5 PACK
- MOUNTING POSITION:
- LOWER
- PRODUCT NAME:
- GASKET
- MATERIAL:
- RUBBER
$44.90 -
JAMES GASKET Head Gasket - XL1100 16665-86
JAMES GASKET
$51.00A failing head gasket compromises combustion chamber sealing, leading to coolant leaks, oil contamination, and catastrophic engine damage. The JAMES GASKET Head Gasket for XL1100 models delivers OEM-spec sealing integrity with superior material...DS174357- SKU:
- DS174357
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MATERIAL:
- -
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- BORE SIZE:
- -
- BORE SIZE IMPERIAL:
- -
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- TYPE:
- CYLINDER HEAD
$51.00 -
JAMES GASKET Muffler Junction Gasket - Big Twin 65721-85
JAMES GASKET
$14.60A leaking muffler junction gasket compromises both performance and aesthetics on your Big Twin—allowing exhaust gases to escape where they shouldn't and creating unwanted noise. This OEM-specification gasket from JAMES seals the critical junction between...DS174354- SKU:
- DS174354
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- TYPE:
- MUFFLER CLAMP
$14.60 -
JAMES GASKET Primary Cover Gasket - Silicon 60538-81-C
JAMES GASKET
$91.60A quality primary cover gasket is critical to preventing oil seepage and maintaining proper engine sealing on your motorcycle. The JAMES GASKET Primary Cover Gasket delivers OEM-exceeding performance with a silicone bead design that handles thermal...DS174352- SKU:
- DS174352
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- COVER
- STYLE:
- PRIMARY
- THICKNESS METRIC:
- 1.60 MM
- UNITS:
- 5 PACK
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- THICKNESS IMPERIAL:
- 0,062'
$91.60 -
JAMES GASKET Primary Inspection Gasket 34906-85
JAMES GASKET
$25.40A reliable primary inspection gasket is essential for maintaining a leak-free seal on your derby or inspection cover, preventing oil seepage that compromises engine cleanliness and performance. The JAMES GASKET Primary Inspection Gasket delivers a...DS174350- SKU:
- DS174350
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- INSPECTION COVER
- FEATURES:
- BEADED
- RIDING STYLE:
- STREET
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- MATERIAL:
- SILICONE
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 1,60 MM (0,062')
- UNITS:
- 5 PACK
$25.40 -
JAMES GASKET Primary Transmission Small Gasket 34903-79
JAMES GASKET
$17.60A failed transmission gasket means fluid leakage, loss of pressure, and potential catastrophic transmission failure. The JAMES GASKET Primary Transmission Small Gasket is engineered with MicroPore technology to provide superior fluid resistance and...DS174349- SKU:
- DS174349
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,80 MM (0,030')
- TYPE:
- PRIMARY
- TYPE:
- TRANSMISSION
- STYLE:
- SMALL
- MATERIAL:
- PAPER
- MOUNTING POSITION:
- INNER
- PRODUCT NAME:
- GASKET
$17.60Qty in Cart: 0Quantity:Price:$17.60Subtotal: -
JAMES GASKET Primary Transmission Large Gasket 34902-79-A
JAMES GASKET
$40.90A reliable transmission gasket is the foundation of a leak-free drivetrain—and this JAMES GASKET primary unit delivers the durability required for high-performance applications. MicroPore gasket paper technology provides superior fluid resistance and...DS174348- SKU:
- DS174348
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- THICKNESS METRIC:
- 0.80 MM
- PRODUCT NAME:
- GASKET
- STYLE:
- LARGE
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,80 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- TYPE:
- PRIMARY
- TYPE:
- TRANSMISSION
- MATERIAL:
- PAPER
$40.90 -
JAMES GASKET Cam Cover Gasket - XL 25263-00-X
JAMES GASKET
$37.30A leaking cam cover gasket compromises engine sealing, invites oil contamination, and creates maintenance headaches that pull you away from track time. The JAMES GASKET XL replacement restores proper compression and prevents costly oil seepage that...DS174347- SKU:
- DS174347
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- TYPE:
- CAM COVER
- FEATURES:
- BEADED
- UNITS:
- 5 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$37.30 -
JAMES GASKET Primary Cover Gasket 60540-36
JAMES GASKET
$54.40A leaking primary cover gasket compromises engine sealing and invites oil contamination into critical drivetrain components. The JAMES GASKET Primary Cover Gasket 60540-36 delivers OEM-equivalent performance with reinforced silicone beading, ensuring a...DS174344- SKU:
- DS174344
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- MATERIAL:
- CORK
- PRODUCT NAME:
- GASKET
- TYPE:
- PRIMARY COVER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$54.40 -
JAMES GASKET Starter Gasket - XL 31488-81
JAMES GASKET
$8.70A worn or compromised starter gasket can lead to oil leaks, contamination of electrical components, and starter failure—all costly problems that compromise reliability. The JAMES GASKET Starter Gasket XL 31488-81 provides a precision-engineered seal that...DS174338- SKU:
- DS174338
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,76 MM (0,030')
- THICKNESS METRIC:
- 0.76 MM
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,030'
- TYPE:
- STARTER HOUSING
- UNITS:
- 10 PACK
$8.70 -
JAMES GASKET Compliance Fitting Gasket 29242-83
JAMES GASKET
$8.20Proper gasket fitment is critical to maintaining system integrity and preventing costly leaks that compromise performance and reliability. The JAMES GASKET Compliance Fitting Gasket 29242-83 delivers OEM-quality sealing with the precision manufacturing...DS174336- SKU:
- DS174336
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$8.20 -
JAMES GASKET Carb Air Cleaner Gasket 29059-88
JAMES GASKET
$7.70A properly sealed carburetor air cleaner gasket is critical to maintaining fuel mixture accuracy and preventing unmetered air leaks that compromise engine tuning. The JAMES GASKET 29059-88 delivers the reliable sealing performance that precision-built...DS174335- SKU:
- DS174335
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,80 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- MOUNTING POSITION:
- AIR CLEANER TO CARBURETOR
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- STYLE:
- AIR CLEANER
- TYPE:
- CARBURETOR
$7.70
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.
