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
-
JAMES GASKET Rocker Box Rubber Gasket - Big Twin 17038-90
JAMES GASKET
$49.95A properly sealed rocker box is fundamental to engine longevity—this JAMES GASKET component prevents oil seepage that compromises performance and creates maintenance headaches. Designed specifically for Big Twin applications, it delivers OEM-equivalent...DS173315- SKU:
- DS173315
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
$49.95 -
JAMES GASKET Big Bore Top End Gasket Kit - 80" 17033-92
JAMES GASKET
$128.95A complete top-end gasket kit is essential for any engine rebuild—sealing integrity directly impacts compression, oil retention, and overall reliability. The JAMES GASKET Big Bore kit supplies all necessary gaskets, oil seals, and O-rings in a single...DS173275- SKU:
- DS173275
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,045'
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.625'
- THICKNESS METRIC:
- 1.14 MM
- TYPE:
- TOP END
- UNITS:
- KIT
$128.95 -
JAMES GASKET Top End Gasket Kit - Big Twin 17033-83-A
JAMES GASKET
$96.95A top-end engine rebuild demands precision-matched gaskets and seals that prevent oil weeping, combustion leakage, and premature wear. The JAMES GASKET Top End Gasket Kit supplies OEM-grade components engineered to factory specifications, eliminating the...DS173251- SKU:
- DS173251
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,045'
- THICKNESS METRIC:
- 1.14 MM
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$96.95 -
JAMES GASKET Top End Gasket Kit - 80" 17040-92
JAMES GASKET
$121.95A complete top-end gasket kit is essential for any engine rebuild—it ensures proper sealing across critical surfaces and prevents oil leakage, coolant weeping, and compression loss that compromise performance and reliability. JAMES GASKET's 80" kit...DS173250- SKU:
- DS173250
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- THICKNESS IMPERIAL:
- 0,045'
- THICKNESS METRIC:
- 1.14 MM
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
$121.95 -
JAMES GASKET Breather Cover Filter - Twin Cam 63815-99
JAMES GASKET
$15.50Rocker box breathers are critical to engine longevity—they allow pressure and moisture to escape while preventing contaminants from entering your crankcase. A quality breather filter like the JAMES GASKET unit protects internal engine components from...DS173248- SKU:
- DS173248
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MATERIAL:
- FIBER
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- FILTER
- TYPE:
- BREATHER
$15.50 -
JAMES GASKET Motor Gasket Kit with Metal - Big Twin 17035-83-B
JAMES GASKET
$132.95A Panhead engine rebuild demands precision sealing—and that's exactly what this JAMES GASKET kit delivers. This complete gasket, oil seal, and O-ring set eliminates the frustration of sourcing individual components and ensures your rebuild meets factory...DS173245- SKU:
- DS173245
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- RIDING STYLE:
- STREET
$132.95 -
JAMES GASKET Top End Gasket Kit - XL 17032-86-B
JAMES GASKET
$113.95A complete top-end gasket kit is essential for any engine rebuild—it ensures proper sealing across all critical surfaces and prevents oil leaks, coolant seepage, and combustion blow-by that compromise performance and reliability. JAMES GASKET's XL...DS173244- SKU:
- DS173244
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$113.95 -
JAMES GASKET Trans Gasket Kit - 5 Speed 33031-85
JAMES GASKET
$59.95A transmission gasket kit is critical infrastructure for maintaining fluid integrity and preventing costly leaks that compromise performance and engine longevity. The JAMES GASKET Trans Gasket Kit is engineered to factory specifications, ensuring a...DS173243- SKU:
- DS173243
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TRANSMISSION
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- STYLE:
- 5-SPEED
$59.95 -
JAMES GASKET Top End Gasket Kit - FX/FL 17034-66
JAMES GASKET
$78.95A top-end engine rebuild demands precision components that won't compromise your seal integrity under extreme operating conditions. JAMES GASKET's purpose-engineered gasket kit eliminates guesswork by delivering every critical seal, O-ring, and gasket...DS173242- SKU:
- DS173242
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$78.95 -
JAMES GASKET Top End Gasket Kit - XL 17032-91
JAMES GASKET
$136.95A complete engine rebuild demands gaskets, seals, and O-rings that maintain compression and prevent fluid leakage under extreme operating conditions. JAMES GASKET's Top End Gasket Kit supplies OEM-quality components engineered to specification,...DS173241- SKU:
- DS173241
- Availability:
- Ships Same Business Day
- Weight:
- 0.64 LBS
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.500'
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$136.95 -
JAMES GASKET Top End Gasket Kit - XL 17030-72-A
JAMES GASKET
$46.95A proper top-end gasket kit is non-negotiable for any engine rebuild—sealing failures lead to oil leaks, compression loss, and catastrophic engine damage. The JAMES GASKET Top End Gasket Kit delivers OEM-grade sealing surfaces with precision-cut...DS173240- SKU:
- DS173240
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- KIT
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$46.95 -
JAMES GASKET Complete Motor Gasket Kit - FX/FL 17029-70
JAMES GASKET
$128.95A complete engine rebuild demands precision gaskets and seals that won't compromise your motor's integrity or leak under pressure. The JAMES GASKET Complete Motor Gasket Kit delivers OEM-quality components engineered to handle the demands of FX/FL...DS173239- SKU:
- DS173239
- Availability:
- Ships Same Business Day
- Weight:
- 1.63 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$128.95 -
JAMES GASKET Trans Gasket/Seal Kit - Twin Cam 33031-99
JAMES GASKET
$52.95Transmission gasket and seal failures lead to costly fluid leaks, loss of pressure, and potential drivetrain damage—especially in high-performance applications where tolerances are tight. The JAMES GASKET Trans Gasket/Seal Kit ensures a proper seal...DS173238- SKU:
- DS173238
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
$52.95 -
JAMES GASKET Air Cleaner Back Plate Gasket 29062-95-B
JAMES GASKET
$17.20A properly sealed air cleaner assembly is fundamental to maintaining consistent air-fuel ratios and preventing unmetered air from compromising engine performance. The JAMES GASKET Air Cleaner Back Plate Gasket ensures a complete seal between your air...DS173235- SKU:
- DS173235
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- STYLE:
- CARBURETOR
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- BACKPLATE
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$17.20 -
JAMES GASKET Cam Gear - Quick Change - Twin Cam 25244-99-K
JAMES GASKET
$56.95Cam gear changes demand precision and reliability—any leak or misalignment can cost you race time and engine integrity. The JAMES GASKET Cam Gear Quick Change kit eliminates guesswork by bundling every seal, gasket, and O-ring you need for a complete,...DS173229- SKU:
- DS173229
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- RIDING STYLE:
- STREET
- TYPE:
- CAM CHANGE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$56.95 -
JAMES GASKET Cam Cover Gasket - Twin Cam 25244-99
JAMES GASKET
$34.10Cam cover gaskets are critical sealing components that prevent oil leakage from your engine's top end—a failure here leads to mess, contamination, and potential engine damage. The JAMES GASKET Twin Cam 25244-99 is OEM-equivalent replacement gasket...DS173228- SKU:
- DS173228
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- UNITS:
- 5 PACK
- MATERIAL:
- PAPER
- TYPE:
- CAM COVER
- RIDING STYLE:
- STREET
- FEATURES:
- BEADED
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- GASKET
$34.10 -
JAMES GASKET Rocker Cover Gasket - Twin Cam 17386-99
JAMES GASKET
$29.95Rocker cover gaskets are a critical seal that directly impact oil retention and engine longevity—a marginal failure here leads to oil weeping, messy engine bays, and potential bearing damage. The JAMES GASKET 17386-99 combines a steel foundation with a...DS173223- SKU:
- DS173223
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- STEEL
- TYPE:
- ROCKER BOX
- UNITS:
- PAIR
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- UPPER
$29.95 -
JAMES GASKET Motor Gasket Kit - Twin Cam 88" 17053-99
JAMES GASKET
$138.95A complete engine rebuild demands precision-engineered gaskets, seals, and O-rings that won't compromise your build's integrity or longevity. The JAMES GASKET Motor Gasket Kit delivers OEM-quality components designed specifically for Twin Cam 88"...DS173222- SKU:
- DS173222
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 1.17 MM
- BORE SIZE IMPERIAL:
- 3.750'
- TYPE:
- MOTOR
- UNITS:
- KIT
- THICKNESS IMPERIAL:
- 0,046'
- TYPE:
- COMPLETE
- RIDING STYLE:
- STREET
$138.95 -
JAMES GASKET Top End Gasket Kit - Twin Cam 17052-99
JAMES GASKET
$125.95A complete top-end gasket kit is essential when rebuilding or refreshing your Twin Cam engine—it ensures proper sealing across all critical surfaces and prevents oil leakage that can compromise engine performance and longevity. JAMES GASKET delivers...DS173221- SKU:
- DS173221
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- BORE SIZE IMPERIAL:
- 3.750'
- THICKNESS METRIC:
- 1.14 MM
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,045'
$125.95 -
JAMES GASKET Exhaust Port Gasket 17048-98
JAMES GASKET
$16.95A failing exhaust port gasket compromises both performance and reliability, allowing exhaust gases to escape where they shouldn't and creating unnecessary heat loss. The JAMES GASKET Exhaust Port Gasket 17048-98 delivers a precision seal that maintains...DS173220- SKU:
- DS173220
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- STREET
$16.95
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.
