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
-
On Sale
COMETIC Top End Gasket Kit - 883 C9194
COMETIC
MSRP: $229.90Now: $216.00Was: $229.90A failing top-end gasket can compromise combustion chamber integrity and lead to costly coolant leaks or compression loss. The COMETIC C9194 eliminates guesswork by supplying every gasket, seal, and O-ring needed for a complete top-end rebuild—engineered...09344805- SKU:
- 09344805
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE SIZE IMPERIAL:
- 3.000'
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,000'
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- TYPE:
- TOP END
- DISPLACEMENT:
- 883 CC
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.76 MM
MSRP: $229.90Now: $216.00Was: $229.90Qty in Cart: 0Quantity:Price:MSRP: $229.90Now: $216.00Was: $229.90Subtotal: -
On Sale
COMETIC Primary Gasket Kit C9210
COMETIC
MSRP: $56.65Now: $53.00Was: $56.65A primary gasket kit is fundamental to any high-performance engine build—seal failure leads to oil weeping, contamination, and power loss. Cometic's AFM material delivers the reliability you need for both street and race applications, with superior...09344806- SKU:
- 09344806
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
MSRP: $56.65Now: $53.00Was: $56.65 -
On Sale
COMETIC Primary Gasket C9309F1
COMETIC
MSRP: $45.10Now: $42.00Was: $45.10A properly sealed primary cover is critical to maintaining oil pressure, preventing leakage, and extending engine life—especially in high-performance applications where thermal cycling and vibration accelerate gasket failure. Cometic's AFM gaskets...09344808- SKU:
- 09344808
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- TYPE:
- PRIMARY
- THICKNESS:
- 1,52 MM (0,060')
- UNITS:
- EACH
- THICKNESS IMPERIAL:
- 0.060'
MSRP: $45.10Now: $42.00Was: $45.10 -
On Sale
COMETIC Primary Gasket - Softail C9607F1
COMETIC
MSRP: $45.10Now: $42.00Was: $45.10A properly sealed primary case is non-negotiable for reliable Softail performance—leaks compromise your engine's integrity and create maintenance headaches. The COMETIC Primary Gasket C9607F1 eliminates guesswork with precision-engineered gasket...09344809- SKU:
- 09344809
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- PRIMARY
- RIDING STYLE:
- STREET
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- UNITS:
- EACH
MSRP: $45.10Now: $42.00Was: $45.10 -
On Sale
COMETIC Engine Gasket Kit - EVO/XL C9755F
COMETIC
MSRP: $257.20Now: $242.00Was: $257.20A quality gasket kit is the foundation of reliable engine sealing—leaks, compression loss, and coolant mixing can cascade into catastrophic engine failure. The COMETIC C9755F delivers multi-layer steel construction and Viton® sealing surfaces across all...09344812- SKU:
- 09344812
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- BORE SIZE IMPERIAL:
- 3.000'
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,000'
- UNITS:
- KIT
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
MSRP: $257.20Now: $242.00Was: $257.20 -
On Sale
COMETIC Complete Gasket Kit - Big Twin C10112
COMETIC
MSRP: $209.95Now: $197.00Was: $209.95A complete gasket failure can leave you stranded mid-season or cost you a race. COMETIC's Big Twin C10112 kit eliminates the guesswork by providing OEM-quality gaskets for every critical seal on your engine—head gaskets, base gaskets, valve stems, and...09344733- SKU:
- 09344733
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.76 MM
- BORE SIZE:
- 3,937'
- BORE SIZE IMPERIAL:
- 3.937'
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
MSRP: $209.95Now: $197.00Was: $209.95Qty in Cart: 0Quantity:Price:MSRP: $209.95Now: $197.00Was: $209.95Subtotal: -
On Sale
COMETIC Complete Gasket Kit - Big Twin C10113
COMETIC
MSRP: $209.95Now: $197.00Was: $209.95A complete gasket failure can cost you days in the shop and thousands in lost racing time. The COMETIC Complete Gasket Kit for Big Twin engines eliminates guesswork by pairing the right material to each sealing surface—Multi-Layer Steel for cylinder...09344734- SKU:
- 09344734
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- BORE SIZE IMPERIAL:
- 4.060'
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- KIT
- BORE SIZE:
- 4,060'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
MSRP: $209.95Now: $197.00Was: $209.95 -
On Sale
COMETIC Head Gasket C9564-2
COMETIC
MSRP: $23.05Now: $22.00Was: $23.05A head gasket failure can compromise your engine's integrity and cost you significant downtime and money. The COMETIC C9564-2 delivers reliable sealing across demanding racing and high-performance applications by distributing load evenly and minimizing...09344708- SKU:
- 09344708
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS METRIC:
- 0.81 MM
- UNITS:
- PAIR
- THICKNESS IMPERIAL:
- 0,032'
- TYPE:
- CYLINDER HEAD
MSRP: $23.05Now: $22.00Was: $23.05 -
On Sale
COMETIC Head Gasket C9565-2
COMETIC
MSRP: $23.05Now: $22.00Was: $23.05A head gasket is your engine's first line of defense against combustion pressure, coolant leaks, and oil bypass—and it demands precision engineering to perform under extreme conditions. The COMETIC C9565-2 uses multi-layer steel construction with...09344709- SKU:
- 09344709
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,032'
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- UNITS:
- PAIR
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CYLINDER HEAD
MSRP: $23.05Now: $22.00Was: $23.05 -
On Sale
COMETIC Head Gasket C9566-2
COMETIC
MSRP: $23.05Now: $22.00Was: $23.05A head gasket is your engine's critical seal against combustion pressure, coolant leakage, and oil seepage. The COMETIC C9566-2 uses multi-layer steel construction with load-control embossments to maintain consistent clamping force across the sealing...09344710- SKU:
- 09344710
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,043'
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.09 MM
- THICKNESS:
- 1,09 MM (0,043')
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
MSRP: $23.05Now: $22.00Was: $23.05 -
COMETIC Cylinder Base Gasket C9603-2
COMETIC
$7.00A properly sealed cylinder base is critical to maintaining compression and preventing oil leakage on your Sportster. The COMETIC Cylinder Base Gasket C9603-2 is engineered to withstand the thermal cycling and pressure demands of high-performance riding,...09344715- SKU:
- 09344715
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,79 MM (0,031')
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- MATERIAL:
- FIBER
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- STANDARD
- THICKNESS IMPERIAL:
- 0,031'
$7.00 -
On Sale
COMETIC Pushrod Cover Seals C9606
COMETIC
Now: $6.00Was: $6.40Pushrod cover leaks are a silent killer of engine cleanliness and long-term reliability. The COMETIC C9606 Pushrod Cover Seals kit contains OEM-equivalent seals and O-rings engineered to eliminate seepage at critical engine junctions. Whether you're...09344716- SKU:
- 09344716
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- STREET
- TYPE:
- PUSHROD COVER
- UNITS:
- 25 PACK
- PRODUCT NAME:
- GASKET
Now: $6.00Was: $6.40Qty in Cart: 0Quantity:Price:Now: $6.00Was: $6.40Subtotal: -
On Sale
COMETIC Cylinder Base Gasket C9618
COMETIC
MSRP: $11.95Now: $11.00Was: $11.95A compromised cylinder base gasket will rob your Sportster of compression and invite oil seepage into your cases—two problems that compound quickly into expensive downtime. The COMETIC C9618 cylinder base gasket delivers the seal integrity you need to...09344718- SKU:
- 09344718
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- THICKNESS:
- 0,79 MM (0,031')
- THICKNESS IMPERIAL:
- 0,031'
- PRODUCT NAME:
- GASKET
- MATERIAL:
- FIBER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
MSRP: $11.95Now: $11.00Was: $11.95 -
On Sale
COMETIC Head Gasket C9698-2
COMETIC
MSRP: $34.60Now: $33.00Was: $34.60A reliable head gasket is critical to maintaining combustion chamber integrity, oil containment, and coolant sealing under extreme pressure and temperature cycles. The COMETIC C9698-2 delivers precision MLS construction that distributes clamping load...09344719- SKU:
- 09344719
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS METRIC:
- 0.51 MM
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
MSRP: $34.60Now: $33.00Was: $34.60Qty in Cart: 0Quantity:Price:MSRP: $34.60Now: $33.00Was: $34.60Subtotal: -
On Sale
COMETIC Cam Service Gasket Kit C9624F
COMETIC
MSRP: $26.20Now: $25.00Was: $26.20A cam change demands precision—and that starts with the right gasket kit. The COMETIC C9624F eliminates guesswork by bundling every seal, gasket, and O-ring you need for a complete, leak-free cam service. Skip the hassle of sourcing components...09341358- SKU:
- 09341358
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- CAM CHANGE
- PRODUCT NAME:
- GASKET KIT
MSRP: $26.20Now: $25.00Was: $26.20 -
On Sale
COMETIC Oil Pump Paper Gasket C9383
COMETIC
Now: $7.00Was: $7.40A failing oil pump gasket compromises engine lubrication and can lead to catastrophic bearing wear or complete engine failure. The COMETIC Oil Pump Paper Gasket C9383 provides a reliable OEM-quality seal that prevents oil leakage at the pump housing,...09341361- SKU:
- 09341361
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- THICKNESS METRIC:
- 0.25 MM
- MATERIAL:
- VULCANIZED FIBER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- MATERIAL:
- PAPER
Now: $7.00Was: $7.40Qty in Cart: 0Quantity:Price:Now: $7.00Was: $7.40Subtotal: -
On Sale
COMETIC Oil Pump Paper Gasket C9381
COMETIC
Now: $7.00Was: $7.40A failing oil pump gasket compromises engine lubrication and invites catastrophic bearing damage—this is non-negotiable for any serious build. The COMETIC C9381 delivers OEM-equivalent sealing reliability with paper gasket construction that handles peak...09341362- SKU:
- 09341362
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- MATERIAL:
- VULCANIZED FIBER
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
Now: $7.00Was: $7.40 -
On Sale
COMETIC Oil Pump Paper Gasket C9384
COMETIC
Now: $7.00Was: $7.40An oil pump gasket is a critical sealing component that prevents oil leakage at the pump housing, maintaining proper lubrication pressure throughout your engine. Cometic's paper gasket construction provides reliable sealing performance while resisting...09341364- SKU:
- 09341364
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- PAPER
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.25 MM
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
Now: $7.00Was: $7.40Qty in Cart: 0Quantity:Price:Now: $7.00Was: $7.40Subtotal: -
On Sale
COMETIC Inspection Cover Gasket - XL C9326F5
COMETIC
Now: $15.00Was: $16.40A leaking inspection cover gasket compromises engine sealing and invites contamination into your engine bay—exactly what you don't need during competition or track days. The COMETIC C9326F5 delivers OEM-quality sealing with the reliability that...09341365- SKU:
- 09341365
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- UNITS:
- 5 PACK
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- INSPECTION COVER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
Now: $15.00Was: $16.40 -
On Sale
COMETIC Head Gasket - 3.937" x .030" C10083-030
COMETIC
MSRP: $59.80Now: $56.00Was: $59.80A head gasket is your engine's critical seal—compromising on quality means risking blown gaskets, coolant leaks, and catastrophic engine damage. The COMETIC C10083-030 uses multi-layer steel construction with load control embossments to maintain even...09343145- SKU:
- 09343145
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE IMPERIAL:
- 3.937'
- THICKNESS:
- 0,76 MM (0,030')
- MATERIAL:
- VITON
- THICKNESS IMPERIAL:
- 0,030'
- BORE SIZE:
- 3,937'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
MSRP: $59.80Now: $56.00Was: $59.80
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.
