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 Trans Top Cover Gasket - FXD 34917-90
JAMES GASKET
$25.50A leaking transmission top cover gasket compromises your bike's reliability and creates a mess in your engine bay. The JAMES GASKET Trans Top Cover Gasket is precision-engineered to seal your FXD transmission housing and eliminate weeping, keeping oil...DS174878- SKU:
- DS174878
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION TOP COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
$25.50 -
JAMES GASKET Trans Top Cover Gasket - Big Twin 34824-79
JAMES GASKET
$10.60A worn transmission top cover gasket is a common source of oil seepage on Big Twin engines, leading to messy leaks and potential internal contamination. The JAMES GASKET Trans Top Cover Gasket delivers a factory-quality seal that eliminates weeping and...DS174831- SKU:
- DS174831
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- STYLE:
- 4-SPEED
- TYPE:
- TRANSMISSION TOP COVER
$10.60 -
JAMES GASKET Oil Pump Cover Gasket - Big Twin 26276-80-A
JAMES GASKET
$14.70Oil seepage at the pump cover is a common failure point that compounds into costly engine damage if left unchecked. A worn or degraded gasket allows oil to bypass the seal, leading to pressure loss and potential bearing wear. JAMES GASKET's OEM-quality...DS174829- SKU:
- DS174829
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- STYLE:
- COVER
$14.70 -
JAMES GASKET Shift Cover Gasket - Big Twin 33196-79
JAMES GASKET
$7.90A leaking shift cover gasket compromises your engine's reliability and creates a messy workspace. The JAMES GASKET Shift Cover Gasket is engineered to seal consistently across thermal cycles, preventing oil seepage that can damage clutch components and...DS174827- SKU:
- DS174827
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- TYPE:
- SHIFTER COVER
- UNITS:
- 10 PACK
$7.90 -
JAMES GASKET Oil Pump Gasket - Big Twin 26273-80-B
JAMES GASKET
$14.70Oil leaks compromise engine performance and create costly maintenance headaches—a quality gasket is your first line of defense against seepage and pressure loss. The JAMES GASKET Oil Pump Gasket is engineered to OEM specifications for Big Twin engines,...DS174826- SKU:
- DS174826
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- STYLE:
- BODY
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
$14.70 -
On Sale
JAMES GASKET Trans Fill Plug Gasket - Big Twin 37091-80
JAMES GASKET
Now: $7.00Was: $17.40A properly sealed transmission fill plug is fundamental to maintaining fluid integrity and preventing costly leaks in your Big Twin engine. The JAMES GASKET Trans Fill Plug Gasket delivers dependable sealing with precision-engineered washers that...DS174825- SKU:
- DS174825
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- WASHER
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
- DISPLACEMENT:
- 1340 CC
- TYPE:
- PLUG
Now: $7.00Was: $17.40Qty in Cart: 0Quantity:Price:Now: $7.00Was: $17.40Subtotal: -
JAMES GASKET Head Gasket - Copper - .16" - XL 16769-73
JAMES GASKET
$33.00A quality head gasket is fundamental to engine sealing integrity—it prevents coolant and oil cross-contamination while maintaining combustion chamber pressure under extreme heat and cylinder stress. The JAMES GASKET copper construction delivers superior...DS174800- SKU:
- DS174800
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- DISPLACEMENT:
- 1000 CC
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,41 MM (0,016')
- UNITS:
- 5 PACK
- THICKNESS IMPERIAL:
- 0.016'
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- COPPER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.41 MM
$33.00 -
JAMES GASKET Derby Cover - .030" - Big Twin 25416-70
JAMES GASKET
$19.70A quality derby cover seal is the unsung hero of a clean, leak-free engine bay. This James Gasket cover seal prevents oil weeping at the inspection and derby covers—a common failure point that can leave your engine looking neglected and create...DS174790- SKU:
- DS174790
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
- THICKNESS:
- 0,80 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- DERBY COVER
- UNITS:
- EACH
$19.70 -
JAMES GASKET Clutch Cover Gasket - Big Twin 60565-36
JAMES GASKET
$38.10A leaking clutch cover gasket compromises both performance and reliability, leaving your Big Twin vulnerable to oil seepage and potential clutch contamination. The JAMES GASKET Clutch Cover Gasket delivers OEM-equivalent sealing with superior material...DS174780- SKU:
- DS174780
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- TYPE:
- CLUTCH COVER
- TYPE:
- DERBY COVER
- MATERIAL:
- CORK
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
$38.10 -
JAMES GASKET 4 Speed Trans End Gasket - Big Twin 33295-36-X
JAMES GASKET
$17.60A leaking transmission end gasket doesn't just waste fluid—it compromises your clutch integrity and invites contamination into your drivetrain. The James Gasket 4 Speed Trans End Gasket is engineered to seal reliably under the thermal and pressure...DS174755- SKU:
- DS174755
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- TYPE:
- SIDE COVER
- FEATURES:
- BEADED
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
$17.60 -
JAMES GASKET Exhaust Stud/Nut Kit EV-1
JAMES GASKET
$20.95A quality exhaust gasket and fastener kit is essential for maintaining a reliable seal at your exhaust manifold, preventing leaks that compromise performance and increase emissions. The JAMES GASKET EV-1 eliminates guesswork by pairing OEM-grade gaskets...DS174749- SKU:
- DS174749
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- FEATURES:
- GRAPHITE/KNITTED WIRE GASKETS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- GRAPHITE
- TYPE:
- EXHAUST PORT
- UNITS:
- KIT
- MATERIAL:
- METAL
$20.95 -
JAMES GASKET Fire-Ring Exhaust Gasket - Big Twin 65834-68-X
JAMES GASKET
$19.00A degraded exhaust gasket compromises sealing integrity, causing exhaust leaks that reduce engine efficiency and increase emissions. The JAMES GASKET Fire-Ring Exhaust Gasket delivers reliable, long-lasting sealing for Big Twin applications with...DS174746- SKU:
- DS174746
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
- UNITS:
- 10 PACK
$19.00 -
JAMES GASKET Copper Exhaust Gasket - BT 65834-68-A
JAMES GASKET
$19.00A proper exhaust gasket is critical to maintaining a reliable, leak-free seal between your exhaust manifold and cylinder head—any compromise here results in lost horsepower, increased emissions, and potential heat damage to surrounding components. The...DS174745- SKU:
- DS174745
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
- UNITS:
- 10 PACK
$19.00 -
JAMES GASKET Exhaust Port Gasket 65324-83
JAMES GASKET
$29.30A leaking exhaust port gasket compromises engine sealing, allows exhaust gases to escape where they shouldn't, and can lead to performance loss and potential engine damage. The JAMES GASKET Exhaust Port Gasket 65324-83 delivers a precision seal designed...DS174742- SKU:
- DS174742
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- EXHAUST PORT
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$29.30 -
JAMES GASKET Exhaust Gasket - FXR/XL 65781-82
JAMES GASKET
$12.95A properly sealed exhaust system is foundational to engine performance and longevity. This James Gasket exhaust gasket eliminates leaks that rob horsepower and allow unburned fuel to escape, ensuring your FXR or XL engine operates at peak efficiency...DS174741- SKU:
- DS174741
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- STYLE:
- CROSSOVER
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
- PRODUCT NAME:
- GASKET
$12.95 -
DRAG SPECIALTIES Exhaust Gasket - Copper - Big Twin 74052
DRAG SPECIALTIES
$9.22A compromised exhaust gasket leads to manifold leaks, power loss, and costly engine damage down the line. DRAG Specialties' copper exhaust gaskets provide reliable sealing across the full operating range of your Big Twin, preventing blow-by and...DS174739- SKU:
- DS174739
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- EXHAUST PORT
- UNITS:
- PAIR
$9.22 -
JAMES GASKET Graphite Exhaust Gasket - BT/XL 65324-83-A
JAMES GASKET
$24.10A quality exhaust gasket is critical to maintaining a proper seal between your exhaust manifold and cylinder head—any leak compromises performance, increases emissions, and creates unwanted noise. James Gaskets' graphite construction provides superior...DS174735- SKU:
- DS174735
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- TYPE:
- EXHAUST PORT
$24.10 -
JAMES GASKET Oil Pump Cover Gasket - Big Twin 26257-41
JAMES GASKET
$13.90An oil pump cover gasket is a critical sealing component that prevents oil leakage at the pump cover interface—a common failure point on Big Twin engines. Without proper sealing here, you'll face slow oil weeping that compounds into major engine damage...DS174732- SKU:
- DS174732
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- STYLE:
- COVER
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
$13.90 -
JAMES GASKET Oil Pump Cover - Big Twin 26255-41
JAMES GASKET
$13.90A quality oil pump cover is critical to maintaining proper engine sealing and preventing costly oil leaks that compromise engine longevity. The JAMES GASKET Oil Pump Cover for Big Twin engines delivers OEM-equivalent sealing performance with precision...DS174731- SKU:
- DS174731
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- STYLE:
- COVER
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
$13.90 -
JAMES GASKET Oil Pump Body Gasket 26246-68-D
JAMES GASKET
$14.70Oil seepage from your pump body isn't just messy—it's a sign of degradation that can compromise engine lubrication and long-term reliability. The JAMES GASKET Oil Pump Body Gasket 26246-68-D is engineered to seal your oil pump housing with precision,...DS174730- SKU:
- DS174730
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- STYLE:
- BODY
- RIDING STYLE:
- STREET
$14.70
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.
