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 Air/Backing Plate Gasket 29313-95
JAMES GASKET
$16.60A properly sealed air/backing plate gasket is critical to maintaining consistent engine performance and preventing oil leakage at a high-wear junction point. This JAMES GASKET OEM-specification gasket ensures a reliable seal without the guesswork of...DS173444- SKU:
- DS173444
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- FEATURES:
- INCLUDES ADHESIVE
- PRODUCT NAME:
- GASKET
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- STYLE:
- AIR CLEANER
- TYPE:
- BACKPLATE
- UNITS:
- 10 PACK
$16.60 -
JAMES GASKET Air Cleaner to Cab Gasket 29059-88-A
JAMES GASKET
$10.30A properly sealed air intake system is critical for maintaining consistent fuel mixture ratios and preventing unfiltered air from bypassing your engine's filtration. The JAMES GASKET Air Cleaner to Cab Gasket eliminates leakage between your air cleaner...DS173442- SKU:
- DS173442
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- FEATURES:
- INCLUDES ADHESIVE
- MOUNTING POSITION:
- AIR CLEANER TO CARBURETOR
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,80 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- CARBURETOR
- STYLE:
- AIR CLEANER
$10.30 -
JAMES GASKET Air Cleaner to Cab Gasket 29059-88-X
JAMES GASKET
$7.70A compromised air cleaner seal allows unfiltered air to bypass your intake system, reducing engine efficiency and increasing wear on internal components. The JAMES GASKET Air Cleaner to Cab Gasket creates a proper seal between your air cleaner assembly...DS173441- SKU:
- DS173441
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- MATERIAL:
- STEEL
- MOUNTING POSITION:
- AIR CLEANER TO CARBURETOR
- STYLE:
- AIR CLEANER
- TYPE:
- CARBURETOR
$7.70 -
JAMES GASKET Head Gasket with O-Ring .030" 16770-84-X
JAMES GASKET
$34.95A properly sealed cylinder head is non-negotiable for reliable engine performance and longevity. The JAMES GASKET Head Gasket with O-Ring delivers consistent compression sealing across thermal cycles, preventing coolant and oil seepage that can...DS173439- SKU:
- DS173439
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- CARBON
- PRODUCT NAME:
- GASKET
- MATERIAL:
- GRAPHITE
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,036'
- BORE SIZE:
- -
- BORE SIZE IMPERIAL:
- -
- THICKNESS METRIC:
- 0.91 MM
- UNITS:
- SET
- TYPE:
- CYLINDER HEAD
$34.95 -
JAMES GASKET Head Gasket with O-Ring - .045" 16770-84-B
JAMES GASKET
$39.30A quality head gasket is fundamental to maintaining combustion chamber seal and preventing coolant or oil seepage that compromises engine reliability. The JAMES GASKET Head Gasket with O-Ring delivers the precision fitment and material integrity your...DS173438- SKU:
- DS173438
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE:
- -
- BORE SIZE IMPERIAL:
- -
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER HEAD
- UNITS:
- 5 PACK
- MATERIAL:
- GRAPHITE
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,045'
- THICKNESS METRIC:
- 1.14 MM
- MATERIAL:
- CARBON
$39.30 -
JAMES GASKET Cylinder Base Gasket - 3-5/8" 16777-86-S
JAMES GASKET
$14.10A reliable cylinder base gasket is critical to maintaining compression and preventing oil leakage at the engine block interface. The JAMES GASKET Cylinder Base Gasket eliminates the need for additional sealant, saving time during assembly and reducing...DS173437- SKU:
- DS173437
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- MATERIAL:
- PAPER
- UNITS:
- 5 PACK
$14.10 -
JAMES GASKET Cylinder Base Gasket - Big Twin 16777-83-A
JAMES GASKET
$14.00A cylinder base gasket is critical to maintaining compression and preventing oil seepage at the engine block's most vulnerable junction. The JAMES GASKET Cylinder Base Gasket is engineered to seal reliably without additional gasket sealer, reducing...DS173436- SKU:
- DS173436
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- CYLINDER BASE
- DISPLACEMENT:
- 1340 CC
- THICKNESS METRIC:
- 0.51 MM
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
$14.00 -
JAMES GASKET Rocker Box Cork - Panhead 17541-48-C
JAMES GASKET
$39.60A quality rocker box gasket is essential to preventing oil leakage and maintaining proper engine sealing on your Panhead—especially critical since even small weeps can accumulate and compromise performance over time. The JAMES GASKET Rocker Box Cork...DS173435- SKU:
- DS173435
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- THICKNESS:
- 3,20 MM (0,125')
- THICKNESS METRIC:
- 3.20 MM
- THICKNESS IMPERIAL:
- 0,125'
- MATERIAL:
- CORK
- TYPE:
- ROCKER COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
$39.60 -
JAMES GASKET Trans Gasket Kit - 4 Speed 33031-70
JAMES GASKET
$53.95A worn transmission gasket kit is one of the most common sources of fluid leaks and performance degradation in vintage and classic 4-speed transmissions. JAMES Gasket delivers OEM-quality sealing with precise tolerances that prevent costly fluid loss and...DS173418- SKU:
- DS173418
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- STYLE:
- 4-SPEED
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
$53.95 -
JAMES GASKET Mylar Gasket/Seal Kit 68-FL
JAMES GASKET
$16.95A worn oil pump compromises lubrication efficiency and can lead to catastrophic engine damage. The JAMES GASKET Mylar Gasket/Seal Kit 68-FL gives you everything needed to completely rebuild or re-bush your oil pump, restoring proper flow rates and system...DS173409- SKU:
- DS173409
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- OIL PUMP
$16.95 -
JAMES GASKET Paper Gasket/Seal Kit 81-FLH
JAMES GASKET
$16.95Oil pump failures compromise lubrication delivery and engine reliability—a risk no serious builder or racer can afford. The JAMES GASKET Paper Gasket/Seal Kit gives you OEM-quality replacement components to fully restore pump performance and seal...DS173408- SKU:
- DS173408
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- OIL PUMP
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$16.95 -
JAMES GASKET Gasket/Seal Kit - XL 54-XL
JAMES GASKET
$16.95A compromised oil pump seal leads to leakage, pressure loss, and catastrophic engine failure—exactly what you're trying to avoid. The JAMES GASKET XL 54-XL kit supplies OEM-quality gaskets and seals to rebuild your pump to factory specifications,...DS173407- SKU:
- DS173407
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- OIL PUMP
- RIDING STYLE:
- STREET
$16.95 -
JAMES GASKET Gasket/Seal Kit - XL 77-XL
JAMES GASKET
$16.95A compromised oil pump gasket or seal can lead to costly leaks, reduced system pressure, and potential engine damage. The JAMES GASKET XL 77-XL kit gives you all the components needed to completely rebuild your oil pump, restoring proper sealing and...DS173406- SKU:
- DS173406
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- OIL PUMP REPAIR
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$16.95 -
JAMES GASKET Top End Gasket Kit - Panhead 17034-48
JAMES GASKET
$44.95A complete top-end gasket kit is essential for any Panhead engine rebuild—skimping on gasket quality leads to oil leaks, compression loss, and premature engine failure. JAMES GASKET delivers OEM-grade components manufactured in the USA, ensuring your...DS173405- SKU:
- DS173405
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$44.95 -
EASTERN MOTORCYCLE PARTS Oil Pump Retainer Clip - Big Twin A-11002
EASTERN MOTORCYCLE PARTS
$5.40The oil pump retainer clip is a critical fastening component that secures your Big Twin oil pump in place, preventing unwanted movement and potential catastrophic damage to your lubrication system. A properly retained oil pump ensures consistent oil...DS173403- SKU:
- DS173403
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- RETAINER RING
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
$5.40 -
JAMES GASKET Tail Lamp Lens Gasket 68122-55
JAMES GASKET
$24.30A failing tail lamp lens gasket compromises both safety and aesthetics—water intrusion leads to corrosion, electrical shorts, and failed inspections. The JAMES GASKET 68122-55 is engineered to seal out moisture while maintaining a clean, factory-correct...DS173395- SKU:
- DS173395
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- TYPE:
- TAIL LAMP LENS
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
$24.30 -
JAMES GASKET Primary Cover Gasket 60540-65
JAMES GASKET
$69.40A properly sealed primary cover is non-negotiable for keeping oil where it belongs and maintaining consistent engine performance. The JAMES GASKET Primary Cover Gasket features silicone beading that conforms precisely to mating surfaces, eliminating...DS173394- SKU:
- DS173394
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- THICKNESS IMPERIAL:
- 0,032'
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 0.81 MM
- UNITS:
- 10 PACK
- TYPE:
- PRIMARY COVER
$69.40 -
JAMES GASKET Generator Mounting Gasket - FL/XL 30143-30
JAMES GASKET
$6.00A reliable generator mounting gasket is critical to preventing oil seepage and maintaining proper engine sealing under sustained operating conditions. The JAMES GASKET Generator Mounting Gasket utilizes advanced MicroPore gasket paper technology to...DS173386- SKU:
- DS173386
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- MOUNTING POSITION:
- GENERATOR TO CASE
- RIDING STYLE:
- STREET
- TYPE:
- GENERATOR MOUNT
$6.00 -
JAMES GASKET Front Tappet Block Gasket - Big Twin 18634-48-C
JAMES GASKET
$8.60A proper seal between your tappet block and engine case is critical to maintaining oil pressure and preventing leaks during high-performance operation. This James complete gasket kit eliminates the guesswork of sourcing individual seals and O-rings,...DS173377- SKU:
- DS173377
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MOUNTING POSITION:
- FRONT
- THICKNESS METRIC:
- 0.51 MM
- PRODUCT NAME:
- GASKET
- TYPE:
- TAPPET BLOCK
- MATERIAL:
- PAPER
- THICKNESS:
- 0,51 MM (0,020')
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- UNITS:
- 10 PACK
$8.60 -
JAMES GASKET Rear Tappet Block Gasket - Big Twin 18633-48-D
JAMES GASKET
$8.60A cam change or tappet block rebuild demands precision—and mismatched or worn gaskets compromise the entire job. The JAMES GASKET Rear Tappet Block Gasket eliminates guesswork by delivering OEM-specification seals purpose-built for Big Twin engines,...DS173376- SKU:
- DS173376
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- THICKNESS:
- 0,51 MM (0,020')
- MOUNTING POSITION:
- REAR
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- TYPE:
- TAPPET BLOCK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$8.60
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.
