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: $61.90Center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements, Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load...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
$125.95To-quality gaskets, oil seals, and o-rings necessary to rebuild an engine, Made in the U.S.A.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
$167.95To-quality gaskets, oil seals, and o-rings necessary to rebuild an engine, Made in the U.S.A.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
$24.95Kit contains fuel fitting O-rings, Made in the U.S.A.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
$44.95Require no gasket sealer, Made in the U.S.A.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
$88.95Top-quality gaskets, oil seals and O-rings necessary to rebuild an engine, Made in the U.S.A.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
$44.95Require no gasket sealer, Made in the U.S.A.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
$59.95Top-quality gaskets, oil seals and O-rings necessary to rebuild an engine, Made in the U.S.A.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
$113.95Top-quality gaskets, oil seals and O-rings necessary to rebuild an engine, Made in the U.S.A.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
$107.95Top-quality gaskets, oil seals and O-rings necessary to rebuild an engine, Made in the U.S.A.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
$90.95Contain gaskets, oil seals and O-rings necessary to completely rebuild a Panhead engine, Made in the U.S.A.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
$65.80Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.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
$49.50Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.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
$66.90Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.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
$66.20Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.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
$110.70Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.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
$77.40Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.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
$33.95Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.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
$33.95Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.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
$67.95Top quality gaskets, seals and o-rings meet or exceed OEM specifications, Primary gasket features silicone beading, Made in the U.S.A.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.
