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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On Sale
COMETIC Head Gasket - .04"- Evo - 3.5" C9689
COMETIC
MSRP: $61.90Now: $58.00Was: $61.90A quality head gasket is the foundation of cylinder head sealing—failure here means catastrophic engine damage. The COMETIC C9689 MLS design delivers the precision bore control and load consistency that high-performance engines demand, whether you're...DS172087- SKU:
- DS172087
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- PAIR
- BORE SIZE:
- 3,500'
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 1,02 MM (0,040')
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- LAYERED STEEL
- THICKNESS IMPERIAL:
- 0,040'
MSRP: $61.90Now: $58.00Was: $61.90 -
JAMES GASKET Complete Motor Gasket Kit - XL 17026-73
JAMES GASKET
$125.95A complete engine gasket kit eliminates the guesswork and potential for incomplete rebuilds by providing all top-quality gaskets, oil seals, and o-rings in one package. Rather than sourcing individual components from multiple suppliers, you get...DS181179- SKU:
- DS181179
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$125.95 -
JAMES GASKET Complete Motor Gasket Kit - XL 17026-86
JAMES GASKET
$167.95A complete engine rebuild demands gaskets and seals that won't compromise your work. This JAMES GASKET kit eliminates the frustration of sourcing individual components—everything you need for a full motor teardown and reassembly is here. U.S...DS181178- SKU:
- DS181178
- Availability:
- Ships Same Business Day
- Weight:
- 1.94 LBS
- TYPE:
- COMPLETE
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$167.95 -
JAMES GASKET Induction Module Gasket Kit - FL 27202-95-K
JAMES GASKET
$24.95Fuel system reliability starts with quality gaskets and seals—a single failed O-ring can compromise your entire induction system and cost you race day. The JAMES GASKET Induction Module Gasket Kit eliminates guesswork by providing precision-engineered...DS174988- SKU:
- DS174988
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- FUEL INJECTOR
- UNITS:
- KIT
$24.95 -
JAMES GASKET Big Bore Base Steel - Big Twin 16777-66-X
JAMES GASKET
$44.95A proper base gasket is foundational to engine reliability—it seals critical surfaces and prevents oil leakage that can compromise performance and longevity. The JAMES GASKET Big Bore Base Steel delivers the precision fit and material quality that Big...DS174983- SKU:
- DS174983
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- BORE SIZE IMPERIAL:
- 3.625'
- FEATURES:
- BEADED
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CYLINDER BASE
- THICKNESS IMPERIAL:
- 0,032'
- RIDING STYLE:
- STREET
- UNITS:
- SET
$44.95 -
JAMES GASKET Big Bore Top End Gasket Kit - 3-5/8" 17034-78-S
JAMES GASKET
$88.95A complete engine rebuild demands precision-matched gaskets, seals, and O-rings that maintain compression and prevent oil leakage under sustained load. The JAMES GASKET Big Bore Top End Gasket Kit delivers the OEM-equivalent quality you need when...DS174982- SKU:
- DS174982
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$88.95 -
JAMES GASKET Metal Base Gasket - 3-5/8" - Big Twin 16777-66-SX
JAMES GASKET
$44.95A properly sealed engine base is fundamental to preventing oil leaks and maintaining consistent crankcase pressure in Big Twin applications. The JAMES GASKET Metal Base Gasket eliminates the guesswork of gasket sealer compatibility and application by...DS174980- SKU:
- DS174980
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- FEATURES:
- BEADED
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
$44.95 -
JAMES GASKET Top End Gasket Kit - E EL 17034-38
JAMES GASKET
$59.95A complete engine rebuild demands precision-engineered gaskets and seals that maintain compression and prevent oil leakage under sustained load. JAMES GASKET's top-end kit eliminates the guesswork by supplying OEM-quality gaskets, oil seals, and O-rings...DS174975- SKU:
- DS174975
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- UNITS:
- KIT
$59.95 -
JAMES GASKET Top End Gasket Kit - FL/FLH 17034-66-X
JAMES GASKET
$113.95A complete top-end gasket rebuild demands precision-fit seals that won't compromise under sustained RPM. JAMES GASKET delivers OEM-grade gaskets, oil seals, and O-rings engineered to eliminate leaks and maintain compression integrity across the entire...DS174973- SKU:
- DS174973
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- UNITS:
- KIT
$113.95 -
JAMES GASKET Top End Gasket Kit - 3-5/8" - EVO/Big Twin 17033-83-S
JAMES GASKET
$107.95A top-end gasket failure can sideline your engine and derail your season. This JAMES GASKET kit delivers all the sealing components you need for a complete, reliable rebuild—gaskets, oil seals, and O-rings engineered to factory specifications and made...DS174972- SKU:
- DS174972
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 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
$107.95 -
JAMES GASKET Complete Gasket Set - E-EL 17028-36
JAMES GASKET
$90.95A complete engine rebuild demands precision sealing at every junction—compromised gaskets lead to oil leaks, compression loss, and costly downtime. The JAMES GASKET Complete Gasket Set delivers all necessary sealing components for a full Panhead engine...DS174965- SKU:
- DS174965
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$90.95 -
JAMES GASKET Primary Gasket - .62" 34952-52-A
JAMES GASKET
$65.80A properly sealed primary case is non-negotiable for reliable engine performance and oil containment. The JAMES GASKET Primary Gasket delivers OEM-equivalent or superior sealing with silicone beading technology, ensuring your engine stays dry under...DS174963- SKU:
- DS174963
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- STYLE:
- PRIMARY
- THICKNESS METRIC:
- 1.60 MM
- RIDING STYLE:
- STREET
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.062'
- TYPE:
- COVER
- UNITS:
- 10 PACK
$65.80 -
JAMES GASKET Primary Cover Gasket - .030" 34955-67-A
JAMES GASKET
$49.50A failing primary cover gasket compromises engine sealing and invites oil leakage into your cases—exactly what you don't need mid-race or mid-ride. The JAMES GASKET Primary Cover Gasket delivers OEM-equivalent sealing performance with silicone beading...DS174962- SKU:
- DS174962
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- COVER
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,030'
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 0.80 MM
- STYLE:
- PRIMARY
$49.50 -
JAMES GASKET Primary Gasket - .030" 34955-75-X
JAMES GASKET
$66.90A properly sealed primary case is non-negotiable for engine reliability and oil retention. The JAMES GASKET Primary Gasket delivers OEM-equivalent or superior sealing performance with factory-grade silicone beading, eliminating leaks that can compromise...DS174961- SKU:
- DS174961
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- SILICONE
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- FEATURES:
- BEADED
- RIDING STYLE:
- STREET
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
$66.90 -
JAMES GASKET Primary Gasket - .30" 34955-89-X
JAMES GASKET
$66.20A primary gasket failure doesn't just leak—it compromises your entire engine sealing system and can lead to costly internal damage. The JAMES GASKET Primary Gasket delivers OEM-equivalent performance with silicone beading for superior sealing integrity,...DS174960- SKU:
- DS174960
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- FEATURES:
- BEADED
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,030'
- UNITS:
- 5 PACK
- THICKNESS METRIC:
- 0.80 MM
- TYPE:
- COVER
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$66.20 -
JAMES GASKET Primary Gasket with Silicon - 5 Speed 34901-79-B
JAMES GASKET
$110.70A faulty primary gasket compromises engine sealing and invites oil leakage into your crankcase—a costly failure on the track or street. The JAMES GASKET Primary Gasket with Silicon delivers OEM-equivalent performance with enhanced silicone beading for...DS174959- SKU:
- DS174959
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- TYPE:
- COVER
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- UNITS:
- 5 PACK
$110.70 -
JAMES GASKET Primary Cover Gasket - .030" 34901-79
JAMES GASKET
$77.40A compromised primary cover gasket will leak oil and compromise engine aesthetics—this JAMES gasket delivers OEM-equivalent sealing performance with proven silicone beading technology. Whether you're rebuilding a motor or replacing a failed gasket, the ...DS174958- SKU:
- DS174958
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- THICKNESS METRIC:
- 0.80 MM
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,030'
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
- TYPE:
- COVER
- PRODUCT NAME:
- GASKET
- STYLE:
- PRIMARY
$77.40 -
JAMES GASKET Primary Gasket Kit 34955-75-K
JAMES GASKET
$33.95A properly sealed primary gasket is non-negotiable for maintaining consistent pressure, preventing fluid seepage, and ensuring reliable engine performance. The JAMES GASKET Primary Gasket Kit 34955-75-K delivers OEM-equivalent quality with reinforced...DS174956- SKU:
- DS174956
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- FEATURES:
- BEADED
- MATERIAL:
- SILICONE
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
$33.95 -
JAMES GASKET Primary Gasket Kit 34955-89-K
JAMES GASKET
$33.95A reliable primary gasket kit is foundational to preventing oil seepage and maintaining crankcase integrity under sustained high RPM operation. The JAMES GASKET Primary Gasket Kit 34955-89-K delivers OEM-equivalent sealing performance with...DS174955- SKU:
- DS174955
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- FEATURES:
- BEADED
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- SILICONE
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
$33.95 -
JAMES GASKET Primary Gasket Kit 34901-79-K
JAMES GASKET
$67.95A properly sealed primary gasket is non-negotiable for maintaining compression, preventing oil weeping, and ensuring reliable engine performance over extended service intervals. The JAMES GASKET Primary Gasket Kit 34901-79-K delivers OEM-spec sealing...DS174954- SKU:
- DS174954
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- SILICONE
- TYPE:
- PRIMARY COVER
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- FEATURES:
- BEADED
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,062'
- THICKNESS METRIC:
- 1.60 MM
- MATERIAL:
- PAPER
$67.95
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.
