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 Derby Cover Gasket - 5 Hole C9152F1
COMETIC
MSRP: $10.95Now: $10.00Was: $10.95A compromised derby cover gasket leads to oil seepage, cosmetic damage, and potential internal contamination on your Harley. The Cometic C9152F1 delivers a precision-engineered seal that eliminates weeping and keeps your engine compartment clean. This is...09341240- SKU:
- 09341240
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- EACH
- MATERIAL:
- SILICONE
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- DERBY COVER
MSRP: $10.95Now: $10.00Was: $10.95Qty in Cart: 0Quantity:Price:MSRP: $10.95Now: $10.00Was: $10.95Subtotal: -
On Sale
COMETIC Primary Gasket Kit C9888
COMETIC
MSRP: $130.15Now: $122.00Was: $130.15If you're rebuilding a primary clutch system, gasket failure isn't an option—it compromises sealing integrity and defeats the purpose of precision machine work. The COMETIC Primary Gasket Kit C9888 uses proprietary AFM (Aluminum Foamette Material)...09340745- SKU:
- 09340745
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
- UNITS:
- KIT
MSRP: $130.15Now: $122.00Was: $130.15 -
On Sale
COMETIC Top End Gasket - Twin Cam C9146
COMETIC
MSRP: $150.10Now: $141.00Was: $150.10Gasket failure is one of the most common causes of top-end leaks and performance loss in Twin Cam engines. The COMETIC C9146 gasket kit eliminates guesswork by providing every seal and gasket you need for a complete, reliable top-end rebuild—eliminating...09341206- SKU:
- 09341206
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- DISPLACEMENT:
- 96'
- MATERIAL:
- RUBBER
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- STAINLESS STEEL
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,750'
- DISPLACEMENT:
- 88'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
MSRP: $150.10Now: $141.00Was: $150.10 -
On Sale
COMETIC Head Gasket - 3 5/8" - .040" C9985
COMETIC
MSRP: $61.90Now: $58.00Was: $61.90A quality head gasket is the foundation of reliable engine sealing—without it, you're risking compression loss, coolant leaks, and catastrophic engine failure. The COMETIC C9985 uses multi-layer steel construction with load control embossments to...09340797- SKU:
- 09340797
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- BORE SIZE:
- 3,625'
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- LAYERED STEEL
- MATERIAL:
- VITON
- THICKNESS:
- 1,02 MM (0,040')
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
MSRP: $61.90Now: $58.00Was: $61.90 -
On Sale
COMETIC Complete Gasket Kit - 1200 XL C9758F
COMETIC
MSRP: $279.25Now: $262.00Was: $279.25A complete gasket kit eliminates the guesswork when rebuilding or refreshing your 1200 XL engine—one order covers every critical seal without hunting for individual components. Cometic's multi-layer construction and Viton coatings ensure reliable...09340806- SKU:
- 09340806
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- BORE SIZE:
- 3,500'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- BORE SIZE IMPERIAL:
- 3.500'
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
MSRP: $279.25Now: $262.00Was: $279.25 -
On Sale
COMETIC Complete Gasket Kit - 1550 - .040 C9920
COMETIC
MSRP: $209.95Now: $197.00Was: $209.95A complete gasket kit eliminates the guesswork and potential for leaks when you're doing a full engine rebuild or major overhaul. Rather than chasing down individual gaskets from multiple suppliers, you get a comprehensive solution engineered for your...09340807- SKU:
- 09340807
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- THICKNESS METRIC:
- 1.02 MM
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- BORE SIZE:
- 3,875'
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
MSRP: $209.95Now: $197.00Was: $209.95 -
On Sale
COMETIC Complete Gasket Kit - 4 Speed C9964
COMETIC
MSRP: $190.00Now: $179.00Was: $190.00A complete gasket kit is the foundation of a reliable engine assembly—sealing failures lead to oil leaks, coolant loss, and catastrophic engine damage. The COMETIC C9964 eliminates guesswork by bundling every gasket you need for a 4-speed build in one...09340809- SKU:
- 09340809
- Availability:
- Ships Same Business Day
- Weight:
- 1.76 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
MSRP: $190.00Now: $179.00Was: $190.00 -
On Sale
COMETIC Complete Gasket Kit - 5 Speed C9965
COMETIC
MSRP: $274.00Now: $258.00Was: $274.00A complete gasket failure can compromise your entire engine's integrity and cost you a race or thousands in repairs. The COMETIC C9965 Complete Gasket Kit eliminates the guesswork by pairing application-specific materials—from MLS head gaskets to...09340811- SKU:
- 09340811
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
MSRP: $274.00Now: $258.00Was: $274.00 -
On Sale
COMETIC Complete Gasket Kit - 74" - FL C9900
COMETIC
MSRP: $222.55Now: $209.00Was: $222.55A complete gasket kit is your insurance policy against oil seepage, coolant leaks, and catastrophic failures that sideline your bike. COMETIC's 74" FL gasket kit uses application-specific materials—MLS head gaskets, Viton seals, and race-grade exhaust...09340812- SKU:
- 09340812
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- BORE SIZE:
- 3,437'
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.437'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
MSRP: $222.55Now: $209.00Was: $222.55Qty in Cart: 0Quantity:Price:MSRP: $222.55Now: $209.00Was: $222.55Subtotal: -
On Sale
COMETIC Head Gasket - .040" - MLS C9205
COMETIC
MSRP: $61.90Now: $58.00Was: $61.90A head gasket failure can cost you a race, a season, or worse—your engine. The COMETIC C9205 MLS head gasket delivers the reliable sealing and durability demanded by serious racers and high-output builds, where factory gaskets simply won't cut it. Its...09341402- SKU:
- 09341402
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE SIZE:
- 3,000'
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- MATERIAL:
- LAYERED STEEL
- MATERIAL:
- VITON
- THICKNESS:
- 1,02 MM (0,040')
- BORE SIZE IMPERIAL:
- 3.000'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
MSRP: $61.90Now: $58.00Was: $61.90 -
On Sale
COMETIC Gasket Kit - EVO/Big Twin C9130
COMETIC
MSRP: $110.20Now: $104.00Was: $110.20Gasket failure on your EVO or Big Twin isn't just an inconvenience—it's catastrophic. Hot spots in the combustion chamber and uneven heat dissipation are the primary culprits behind blown gaskets and costly rebuilds. The COMETIC C9130 Gasket Kit...09341203- SKU:
- 09341203
- Availability:
- Ships Same Business Day
- Weight:
- 0.77 LBS
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- RUBBER
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- MATERIAL:
- STAINLESS STEEL
- TYPE:
- TOP END
MSRP: $110.20Now: $104.00Was: $110.20 -
On Sale
COMETIC Complete Gasket Kit - 1200 EVO - .040" C9133
COMETIC
MSRP: $202.60Now: $190.00Was: $202.60A complete gasket failure can sideline your 1200 EVO and cost you critical track time or riding season. This COMETIC kit eliminates guesswork by providing OEM-quality gaskets for every critical seal point—from head to exhaust—using purpose-built...09341204- SKU:
- 09341204
- Availability:
- Ships Same Business Day
- Weight:
- 1.74 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- MATERIAL:
- STEEL
- THICKNESS METRIC:
- 1.02 MM
- THICKNESS IMPERIAL:
- 0,040'
- BORE SIZE:
- 3,8125'
- BORE SIZE IMPERIAL:
- 3.8125'
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
MSRP: $202.60Now: $190.00Was: $202.60Qty in Cart: 0Quantity:Price:MSRP: $202.60Now: $190.00Was: $202.60Subtotal: -
On Sale
COMETIC Top End Gasket - Twin Cam C9147
COMETIC
MSRP: $150.10Now: $141.00Was: $150.10A top-end rebuild demands gaskets engineered to handle extreme combustion pressures and thermal cycling without compromise. The COMETIC C9147 kit eliminates the guesswork—every seal you need to rebuild from the cylinder base upward comes in one complete...09341207- SKU:
- 09341207
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.875'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- DISPLACEMENT:
- 103'
- DISPLACEMENT:
- 95'
- MATERIAL:
- STAINLESS STEEL
- BORE SIZE:
- 3,875'
- MATERIAL:
- RUBBER
MSRP: $150.10Now: $141.00Was: $150.10 -
On Sale
COMETIC Complete Gasket Kit - FXD C9148
COMETIC
MSRP: $209.95Now: $197.00Was: $209.95A complete gasket failure can cost you a race—or worse, sideline your engine indefinitely. The COMETIC Complete Gasket Kit for FXD ensures a reliable seal across every critical junction in your motor, letting you focus on performance instead of worrying...09341208- SKU:
- 09341208
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,750'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- MATERIAL:
- STEEL
MSRP: $209.95Now: $197.00Was: $209.95 -
On Sale
COMETIC Complete Gasket Kit - FXD C9149
COMETIC
MSRP: $209.95Now: $197.00Was: $209.95A complete gasket kit eliminates the guesswork when rebuilding or refreshing your FXD engine—one order covers everything from head gaskets to primary covers, so you're not chasing down individual components later. Cometic's multi-layer construction and...09341209- SKU:
- 09341209
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- BORE SIZE:
- 3,875'
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- THICKNESS METRIC:
- 0.76 MM
- UNITS:
- KIT
MSRP: $209.95Now: $197.00Was: $209.95 -
On Sale
COMETIC Primary Gasket Kit C9150
COMETIC
MSRP: $121.75Now: $114.00Was: $121.75A primary gasket kit is only as good as its ability to seal consistently under extreme heat and pressure—and that's where Cometic's AFM material excels. If you're running a high-performance engine, factory gaskets won't cut it; they'll blow out, leak,...09341210- SKU:
- 09341210
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- TYPE:
- PRIMARY
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
MSRP: $121.75Now: $114.00Was: $121.75Qty in Cart: 0Quantity:Price:MSRP: $121.75Now: $114.00Was: $121.75Subtotal: -
On Sale
COMETIC Cam Cover Gasket - Big Twin C9302F5
COMETIC
Now: $22.00Was: $23.50A leaking cam cover gasket compromises engine sealing and can lead to oil seepage onto critical engine components. The COMETIC Cam Cover Gasket for Big Twin engines delivers reliable, long-lasting sealing with premium materials designed to handle...20111497- SKU:
- 20111497
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- TYPE:
- CAM COVER
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- 5 PACK
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
Now: $22.00Was: $23.50 -
On Sale
COMETIC Cam Cover Gasket - Big Twin C9334F5
COMETIC
Now: $41.00Was: $44.00A leaking cam cover gasket compromises engine cleanliness and can lead to oil seepage onto critical components. The COMETIC Cam Cover Gasket C9334F5 delivers factory-spec sealing performance with superior material durability, eliminating the need for...20111499- SKU:
- 20111499
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- CAM COVER
Now: $41.00Was: $44.00 -
On Sale
COMETIC Cam Cover Gasket - XL C9311F5
COMETIC
Now: $50.00Was: $53.50A failing cam cover gasket can silently sabotage your engine—leaking oil onto hot components, creating fire hazards, and compromising internal cleanliness. The COMETIC Cam Cover Gasket XL C9311F5 delivers OEM-grade sealing with superior materials and...20111501- SKU:
- 20111501
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS IMPERIAL:
- 0.060'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- TYPE:
- CAM COVER
Now: $50.00Was: $53.50 -
On Sale
COMETIC Cam Cover Gasket - XL C9313F5
COMETIC
Now: $45.00Was: $48.20A failing cam cover gasket compromises engine sealing and invites oil leakage into critical ignition components—exactly what you don't need during a race or long-distance drive. COMETIC's cam cover gasket delivers the precision fit and material...20111502- SKU:
- 20111502
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- CAM COVER
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS METRIC:
- 1.52 MM
- UNITS:
- 5 PACK
Now: $45.00Was: $48.20
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.
