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 Bearing Housing Gasket - 5 Speed 35652-79-A
JAMES GASKET
$21.10A worn or compromised bearing housing gasket is a common culprit behind transmission fluid leaks and premature bearing wear in 5-speed transmissions. This JAMES GASKET replacement delivers OEM-equivalent sealing performance without the dealership markup,...DS174131- SKU:
- DS174131
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- TYPE:
- BEARING HOUSING
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
$21.10 -
JAMES GASKET Primary Cover Gasket 34952-52
JAMES GASKET
$41.40A failing primary cover gasket compromises engine sealing and invites oil leakage that can damage your engine bay and void warranty claims. The JAMES GASKET Primary Cover Gasket delivers OEM-spec performance with silicone beading for superior compression...DS174130- SKU:
- DS174130
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
$41.40 -
JAMES GASKET Cylinder Base Gasket - XL 16774-57
JAMES GASKET
$12.80A properly sealed cylinder base is critical to maintaining compression and preventing oil leakage in high-performance engines. The JAMES GASKET Cylinder Base Gasket delivers reliable sealing without the need for additional gasket sealers, giving you a...DS174120- SKU:
- DS174120
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- TYPE:
- CYLINDER BASE
- UNITS:
- 10 PACK
- DISPLACEMENT:
- 900 CC
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
$12.80 -
JAMES GASKET Steel Base Gasket - XL 16774-96
JAMES GASKET
$44.95A quality base gasket is critical to maintaining a leak-free seal on your engine's crankcase, and the JAMES GASKET Steel Base Gasket delivers the reliability you need without the mess of additional sealers. Machined from durable steel and engineered to...DS174117- SKU:
- DS174117
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- STANDARD
- FEATURES:
- BEADED
- TYPE:
- CYLINDER BASE
$44.95 -
JAMES GASKET Metal Base Gasket with Silicone - Big Twin 16777-94
JAMES GASKET
$44.95A properly sealed engine base is non-negotiable for reliability and performance. The JAMES GASKET Metal Base Gasket eliminates the guesswork with a pre-formed design that seals right out of the box—no gasket sealer required. Built tough in the USA, this...DS174116- SKU:
- DS174116
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,017'
- THICKNESS METRIC:
- 0.43 MM
- UNITS:
- SET
- MATERIAL:
- RUBBER
- FEATURES:
- BEADED
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
$44.95 -
JAMES GASKET Cylinder Base Gasket - XL 16774-72
JAMES GASKET
$11.40A reliable cylinder base gasket is critical to maintaining proper compression and preventing oil seepage in your engine. The JAMES GASKET XL 16774-72 eliminates the need for additional gasket sealer, giving you a hassle-free installation that holds up...DS174110- SKU:
- DS174110
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- DISPLACEMENT:
- 1000 CC
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$11.40 -
JAMES GASKET Cylinder Head Gasket - XL 16769-72-A
JAMES GASKET
$43.20A cylinder head gasket is your engine's first line of defense against combustion pressure, coolant leaks, and oil seepage. The JAMES GASKET XL 16769-72-A delivers OEM-equivalent sealing performance with the reliability demanded by serious racers and...DS174080- SKU:
- DS174080
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- COPPER
- UNITS:
- 10 PACK
- DISPLACEMENT:
- 1000 CC
- THICKNESS:
- 0,41 MM (0,016')
- THICKNESS METRIC:
- 0.41 MM
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.016'
$43.20 -
JAMES GASKET Cam Cover Gasket - XL 25263-81
JAMES GASKET
$32.30Cam cover gasket failures lead to oil seepage, potential engine contamination, and costly downtime. The JAMES GASKET XL 25263-81 delivers OEM-grade sealing performance with precision engineering that prevents leaks before they start. Whether you're...DS174075- SKU:
- DS174075
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- PAPER
- THICKNESS METRIC:
- 0.79 MM
- TYPE:
- CAM COVER
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
$32.30 -
JAMES GASKET Starter Primary Gasket - XLCH 31461-70
JAMES GASKET
$21.20A proper seal on your primary cover is non-negotiable for engine reliability and performance. The JAMES GASKET Starter Primary Gasket prevents oil weeping that can compromise your ignition system and create messy drips on your garage floor. This...DS174072- SKU:
- DS174072
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- CORK
- TYPE:
- STARTER HOUSING
- UNITS:
- 10 PACK
- MOUNTING POSITION:
- STARTER HOUSING TO PRIMARY MOUNT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
$21.20 -
JAMES GASKET Starter Housing Gasket - XL 31488-77
JAMES GASKET
$9.30A leaking starter housing gasket will drain your engine's oil and compromise starter reliability—two problems that compound quickly on the track or in the shop. The JAMES GASKET XL 31488-77 delivers a precision seal with factory-grade durability, keeping...DS174071- SKU:
- DS174071
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- STARTER BODY TO HOUSING MOUNT
- PRODUCT NAME:
- GASKET
- TYPE:
- STARTER HOUSING
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
$9.30 -
JAMES GASKET Rocker Cover Gasket - XL 17536-70
JAMES GASKET
$15.40A rocker cover gasket is your first line of defense against oil leaks that compromise engine cleanliness and performance. This JAMES GASKET component uses a proven solid steel core with dual-sided elastomer coating to maintain a consistent, reliable seal...DS174060- SKU:
- DS174060
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- DISPLACEMENT:
- 1000 CC
- PRODUCT NAME:
- GASKET
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- 10 PACK
$15.40 -
JAMES GASKET Timing Cover Gasket - XL 25224-52-A
JAMES GASKET
$29.10A leaking timing cover gasket can compromise engine sealing and lead to oil weeping that accelerates wear on surrounding components. The JAMES GASKET Timing Cover Gasket delivers OEM-level sealing performance with precision engineering that eliminates...DS174050- SKU:
- DS174050
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- PAPER
- THICKNESS METRIC:
- 0.79 MM
- TYPE:
- CAM COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- 10 PACK
$29.10 -
JAMES GASKET Generator Gasket 30143-58
JAMES GASKET
$6.00A reliable gasket is the foundation of a sealed engine system—without it, you're risking fluid leaks and performance loss. The JAMES GASKET Generator Gasket 30143-58 uses advanced MicroPore paper technology to deliver superior sealability and fluid...DS174040- SKU:
- DS174040
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- PAPER
- MOUNTING POSITION:
- GENERATOR TO CASE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- TYPE:
- GENERATOR MOUNT
$6.00 -
JAMES GASKET Clutch Cover Gasket - XL 37762-52
JAMES GASKET
$26.10A worn or failing clutch cover gasket can lead to oil seepage, contamination of your clutch assembly, and potential drivetrain damage. The JAMES GASKET Clutch Cover Gasket XL 37762-52 delivers reliable sealing with OEM-equivalent materials and precision...DS174020- SKU:
- DS174020
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- TYPE:
- CLUTCH COVER
$26.10 -
JAMES GASKET Primary Cover Gasket 34955-75
JAMES GASKET
$64.10A properly sealed primary cover is critical to maintaining crankcase pressure and preventing oil seepage that compromises engine cleanliness and performance. The JAMES GASKET Primary Cover Gasket delivers OEM-equivalent sealing with silicone beading...DS174015- SKU:
- DS174015
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$64.10 -
JAMES GASKET Primary Cover Gasket 34955-89
JAMES GASKET
$66.90A reliable primary cover gasket is foundational to maintaining crankcase sealing integrity and preventing oil leakage at a critical junction point. The JAMES GASKET Primary Cover Gasket 34955-89 delivers OEM-equivalent performance with silicone beading...DS174014- SKU:
- DS174014
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- PAPER
$66.90 -
JAMES GASKET Primary Cover Gasket 34955-67
JAMES GASKET
$49.50A failing primary cover gasket will compromise engine sealing and lead to oil leakage, reduced performance, and potential engine damage. The JAMES GASKET Primary Cover Gasket delivers OEM-equivalent reliability with enhanced silicone beading for superior...DS174010- SKU:
- DS174010
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- COVER
- STYLE:
- PRIMARY
- THICKNESS METRIC:
- 0.51 MM
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- UNITS:
- 10 PACK
$49.50 -
DRAG SPECIALTIES Replacement Hook Kit 173978-BX-LB2
DRAG SPECIALTIES
$23.64Display board hooks wear out, break, or get lost—leaving your workspace disorganized and your parts exposed. The DRAG Specialties Replacement Hook Kit restores functionality to your board with durable, reliable hooks designed for heavy-duty shop use...DS173978- SKU:
- DS173978
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- HOOK KIT
- RIDING STYLE:
- STREET
$23.64 -
JAMES GASKET Head Gasket - 4" - EVO 16773-96-X
JAMES GASKET
$66.95A quality head gasket is critical to maintaining cylinder pressure and preventing coolant leakage—two factors that directly impact engine reliability and performance. The JAMES GASKET 4" Head Gasket is engineered to withstand high combustion pressures...DS173542- SKU:
- DS173542
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,045'
- BORE SIZE:
- 4,000'
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.14 MM
- THICKNESS:
- 1,14 MM (0,045')
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
$66.95 -
JAMES GASKET Metal Base Gasket - 4" - Evo 16777-96-X
JAMES GASKET
$44.95A properly sealed metal base gasket is critical to preventing oil leaks and maintaining crankcase pressure in high-performance engines. The JAMES GASKET Metal Base Gasket eliminates the need for additional gasket sealers, giving you a cleaner, more...DS173541- SKU:
- DS173541
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- METAL
- PRODUCT NAME:
- GASKET
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- FEATURES:
- BEADED
- MATERIAL:
- RUBBER
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
$44.95
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.
